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Disentangling the near infrared continuum spectral components of the
inner 500 pc of Mrk 573: two-dimensional maps: We present a near infrared study of the spectral components of the continuum
in the inner 500$\times$500 pc$^2$ of the nearby Seyfert galaxy Mrk573 using
adaptive optics near-infrared integral field spe... | astro-ph_GA |
A southern hemisphere survey of the 5780 and 6284 Å diffuse
interstellar bands: correlation with the extinction: We present a new database of 5780.5 and 6283.8 {\AA} DIB measurements and
also study their correlation with the reddening. The database is based on
high-resolution, high-quality spectra of early-type nearb... | astro-ph_GA |
CO luminosity function from Herschel-selected galaxies and the
contribution of AGN: We derive the CO luminosity function (LF) for different rotational
transitions (i.e. (1-0), (3-2), (5-4)) starting from the Herschel LF by
Gruppioni et al. and using appropriate $L'_{\rm CO} - L_{\rm IR}$ conversions
for different gal... | astro-ph_GA |
ATCA observations of SiO masers in the Galactic center: We present the Australia Telescope Compact Array (ATCA) observations of the
SiO masers in the Galactic center in transitions of v=1, J=2--1 at 86 GHz and
v=1, J=1--0 at 43 GHz. Two 86-GHz SiO masers were detected within the central
parsec, and they are associated ... | astro-ph_GA |
Star clusters near and far; tracing star formation across cosmic time: Star clusters are fundamental units of stellar feedback and unique tracers of
their host galactic properties. In this review, we will first focus on their
constituents, i.e.\ detailed insight into their stellar populations and their
surrounding ioni... | astro-ph_GA |
Ionized gas in the NGC 3077 galaxy: The nearby dwarf galaxy NGC 3077 is known for its peculiar morphology, which
includes numerous dust lanes and emission-line regions. The interstellar medium
in this galaxy is subject to several perturbing factors. These are primarily
the central starburst and tidal structures in the ... | astro-ph_GA |
A comprehensive view of the Virgo Stellar Stream: Radial velocities and metallicities have been measured for 82 RR Lyrae
identified by the QUEST survey in the direction of the Virgo constellation.
Distributed over 90 sq. deg. of the sky, they lie from 4 to 23 kpc from the
Sun. Using an algorithm for finding groups in p... | astro-ph_GA |
NGDEEP Epoch 1: Spatially Resolved H$α$ Observations of Disk and
Bulge Growth in Star-Forming Galaxies at $z \sim$ 0.6-2.2 from JWST NIRISS
Slitless Spectroscopy: We study the H$\alpha$ equivalent width, EW(H$\alpha$), maps of 19 galaxies
at $0.6 < z < 2.2$ in the Hubble Ultra Deep Field (HUDF) derived from NIRISS
... | astro-ph_GA |
Spectro-photometric decomposition of galaxy structural components: Galaxies are complex systems made up of different structural components such
as bulges, discs, and bars. Understanding galaxy evolution requires unveiling,
independently, their history of stellar mass and metallicity assembly. We
introduce C2D, a new al... | astro-ph_GA |
Angular Momentum of Dwarf Galaxies: We present measurements of baryonic mass Mb and specific angular momentum
(sAM) jb in 14 rotating dwarf Irregular (dIrr) galaxies from the LITTLE THINGS
sample. These measurements, based on 21cm kinematic data from the Very Large
Array and stellar mass maps from the Spitzer Space Tel... | astro-ph_GA |
The Imprint of Reionization on the Star Formation Histories of Dwarf
Galaxies: We explore the impact of cosmic reionization on nearby isolated dwarf
galaxies using a compilation of SFHs estimated from deep HST data and a
cosmological hydrodynamical simulation of the Local Group. The nearby dwarfs
show a wide diversit... | astro-ph_GA |
The Transition Region between Brightest Cluster Galaxies and
Intra-Cluster Light in Galaxy Groups and Clusters: We take advantage of a state-of-art semi analytic model of galaxy formation,
and the model presented in \citet{contini21a}, to investigate the mass
distribution of Brightest Cluster Galaxies (BCGs) and Intr... | astro-ph_GA |
The DiskMass Survey. VIII. On the Relationship Between Disk Stability
and Star Formation: We study the relationship between the stability level of late-type galaxy
disks and their star-formation activity using integral-field gaseous and
stellar kinematic data. Specifically, we compare the two-component (gas+stars)
st... | astro-ph_GA |
Survey of Gravitationally-lensed Objects in HSC Imaging (SuGOHI). II.
Environments and Line-of-Sight Structure of Strong Gravitational Lens
Galaxies to z ~ 0.8: We investigate the local and line-of-sight overdensities of strong
gravitational lens galaxies using wide-area multiband imaging from the Hyper
Suprime-Cam... | astro-ph_GA |
A Photodissociation Region study of NGC 4038: We present a model of the photodissociation regions of NGC 4038, which is
part of the Antennae galaxies. We have considered one-dimensional slabs of
uniform density all having a maximum $A_V=10\,{\rm mag}$, interacting with
plane-parallel radiation. The density range in our... | astro-ph_GA |
The H$α$ broadband photometric reverberation mapping of four
Seyfert 1 galaxies: Broadband photometric reverberation mapping (PRM) have been investigated for
AGNs in recent years, but mostly on accretion disk continuum RM. Due to the
small fraction of broad emission lines in the broadband, PRM for emission lines
is v... | astro-ph_GA |
Cosmological simulations of dwarfs: the need for ISM physics beyond SN
feedback alone: The dominant feedback mechanism in low mass haloes is usually assumed to take
the form of massive stars exploding as supernovae (SNe). We perform very high
resolution cosmological zoom-in simulations of five dwarf galaxies to z = 4... | astro-ph_GA |
The evolutionary tracks of young massive star clusters: Stars mostly form in groups consisting of a few dozen to several ten thousand
members. For 30 years, theoretical models provide a basic concept of how such
star clusters form and develop: they originate from the gas and dust of
collapsing molecular clouds. The con... | astro-ph_GA |
ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: The Infrared
Excess of UV-selected z=2-10 galaxies as a function of UV-continuum Slope and
Stellar Mass: We make use of deep 1.2mm-continuum observations (12.7microJy/beam RMS) of a
1 arcmin^2 region in the Hubble Ultra Deep Field to probe dust-enshrouded st... | astro-ph_GA |
Powerful H2 Line Cooling in Stephan's Quintet II. Group-wide Gas and
Shock Modeling of the Warm H2 and a Comparison with [CII]157.7um Emission and
Kinematics: We map for the first time the two-dimensional H_2 excitation of warm
intergalactic gas in Stephan's Quintet on group-wide (50 x 35 kpc^2) scales to
quantify ... | astro-ph_GA |
Probing star formation and feedback in dwarf galaxies. Integral field
view of the blue compact galaxy Tololo 1937-423: (Abridged) Blue compact galaxies (BCG) are gas-rich, low-mass, small systems
that form stars at unusually high rates. This makes them excellent laboratories
for investigating the process of star-form... | astro-ph_GA |
Identification of High-Redshift Galaxy Overdensities in GOODS-N and
GOODS-S: We conduct a systematic search for high-redshift galaxy overdensities at $4.9
< z_{\,\mathrm{spec}} < 8.9$ in both the GOODS-N and GOODS-S fields using
JWST/NIRCam imaging from JADES and JEMS in addition to JWST/NIRCam wide field
slitless sp... | astro-ph_GA |
The pattern speeds of vertical breathing waves: We measure and compare the pattern speeds of vertical breathing, vertical
bending, and spiral density waves in two isolated N-body+SPH simulations, using
windowed Fourier transforms over 1 Gyr time intervals. We show that the pattern
speeds of the breathing waves match th... | astro-ph_GA |
Disk Evolution in W5: Intermediate Mass Stars at 2-5 Myr: We present the results of a survey of young intermediate mass stars (age
$<$~5 Myr, 1.5 $<M_{\star} \leq $ 15 $M_{\odot}$) in the W5 massive star
forming region. We use combined optical, near-infrared and {\it Spitzer} Space
Telescope photometry and optical spec... | astro-ph_GA |
Star Formation in a Strongly Magnetized Cloud: We study star formation in the Center Ridge 1 (CR1) clump in the Vela C giant
molecular cloud, selected as a high column density region that shows the lowest
level of dust continuum polarization angle dispersion, likely indicating that
the magnetic field is relatively stro... | astro-ph_GA |
A near-infrared study of the obscured 3C129 galaxy cluster: We present a catalogue of 261 new infrared selected members of the 3C129
galaxy cluster. The cluster, located at $z \approx$ 0.02, forms part of the
Perseus-Pisces filament and is obscured at optical wavelengths due to its
location in the zone of avoidance. We... | astro-ph_GA |
Outflow and metallicity in the broad-line region of low-redshift active
galactic nuclei: Outflows in active galactic nuclei (AGNs) are crucial to understand in
investigating the co-evolution of supermassive black holes (SMBHs) and their
host galaxies since outflows may play an important role as an AGN feedback
mechan... | astro-ph_GA |
The Role of Non-ionizing Radiation Pressure in Star Formation: The
Stability of Cores and Filaments: Stars form when filaments and dense cores in molecular clouds fragment and
collapse due to self-gravity. In the most basic analyses of gravitational
stability, the competition between self-gravity and thermal pressure... | astro-ph_GA |
CO in OH/IR stars close to the Galactic centre: Aims: A pilot project has been carried out to measure circumstellar CO
emission from three OH/IR stars close to the Galactic centre. The intention was
to find out whether it would be possible to conduct a large-scale survey for
mass-loss rates using, for example, the Atac... | astro-ph_GA |
Herschel Observations of the T Cha Transition Disk: Constraining the
Outer Disk Properties: T Cha is a nearby (d = 100 pc) transition disk known to have an optically
thin gap separating optically thick inner and outer disk components. Huelamo et
al. (2011) recently reported the presence of a low-mass object candidate... | astro-ph_GA |
Enhanced X-ray Emission from the Most Radio-Powerful Quasar in the
Universe's First Billion Years: We present deep (265 ks) Chandra X-ray observations of PSO
J352.4034$-$15.3373, a quasar at z=5.831 that, with a radio-to-optical flux
ratio of R>1000, is one of the radio-loudest quasars in the early universe and
is th... | astro-ph_GA |
Imprints of interaction processes in the globular cluster system of NGC
3640: We present a wide-field study of the globular cluster systems (GCS) of the
elliptical galaxy NGC 3640 and its companion NGC 3641, based on observations
from Gemini Multi-Object Spectrograph/Gemini. NGC 3640 is a shell galaxy which
presents ... | astro-ph_GA |
The Carina Project. VIII. The α-element abundances: We have performed a new abundance analysis of Carina Red Giant (RG) stars
from spectroscopic data collected with UVES (high resolution) and
FLAMES/GIRAFFE (high and medium resolution) at ESO/VLT. The former sample
includes 44 RGs, while the latter consists of 65 (high... | astro-ph_GA |
On the carriers of the 3.4-micrometer absorption and emission bands, and
their evolution: Based on the results of chemical analysis and simulation of kerogens and
immature coals, a large number of chemical structures carrying the 3.4-mum
feature were studied by means of computer simulation codes. Further selection
cr... | astro-ph_GA |
Gentle heating by mixing in cooling flow clusters: We analyze three-dimensional hydrodynamical simulations of the interaction of
jets and the bubbles they inflate with the intra-cluster medium (ICM), and show
that the heating of the ICM by mixing hot bubble gas with the ICM operates over
tens of millions of years, and ... | astro-ph_GA |
Probing The Ultraviolet Luminosity Function of the Earliest Galaxies
with the Renaissance Simulations: In this paper, we present the first results from the Renaissance Simulations,
a suite of extremely high-resolution and physics-rich AMR calculations of high
redshift galaxy formation performed on the Blue Waters sup... | astro-ph_GA |
An evolutionary continuum from nucleated dwarf galaxies to star clusters: Systematic studies have revealed hundreds of ultra-compact dwarf galaxies
(UCDs) in the nearby Universe. With half-light radii $r_h$ of approximately
10-100 parsecs and stellar masses $M_*$ $\approx$ $10^6-10^8$ solar masses,
UCDs are among the d... | astro-ph_GA |
Post-Starburst Galaxies in SDSS-IV MaNGA: Post-starburst galaxies, identified by their unusually strong Balmer
absorption lines and weaker than average emission lines, have traditionally
been selected based on their central stellar populations. Here we identify 360
galaxies with post-starburst regions from the MaNGA in... | astro-ph_GA |
MIGHTEE-HI: the HI Size-Mass relation over the last billion years: We present the observed HI size-mass relation of $204$ galaxies from the
MIGHTEE Survey Early Science data. The high sensitivity of MeerKAT allows us to
detect galaxies spanning more than 4 orders of magnitude in HI mass, ranging
from dwarf galaxies to ... | astro-ph_GA |
The GALAH survey: Elemental abundances in open clusters using joint
effective temperature and surface gravity photometric priors: The ability to measure precise and accurate stellar effective temperatures
($T_{\rm{eff}}$) and surface gravities ($\log(g)$) is essential in determining
accurate and precise abundances of... | astro-ph_GA |
Galactic Orbital Effects on Pulsar Timing: In the currently accepted paradigm, dark matter is hypothesized as an
explanation of the flat rotation curves of galaxies under the assumption of
virialized orbits. The use of millisecond pulsar timing as a probe of Galactic
dark matter content is explored as a means of relaxi... | astro-ph_GA |
Stellar population analysis of MaNGA early-type galaxies: IMF dependence
and systematic effects: We study systematics associated with estimating simple stellar population
(SSP) parameters -- age, metallicity [M/H], $\alpha$-enhancement [$\alpha$/Fe]
and IMF shape -- and associated $M_*/L$ gradients, of elliptical slo... | astro-ph_GA |
Bipolar Outflows out to 10~kpc for Massive Galaxies at Redshift
$z\approx 1$: Galactic outflows are believed to play a critical role in the evolution of
galaxies by regulating their mass build-up and star formation. Theoretical
models assumes bipolar shapes for the outflows that extends well into the
circumgalctic me... | astro-ph_GA |
Metal flows of the circumgalactic medium, and the metal budget in
galactic halos: We present an analysis of the flow of metals through the circumgalactic
medium (CGM) in the Feedback in Realistic Environments (FIRE) simulations of
galaxy formation, ranging from isolated dwarfs to $L*$ galaxies. We find that
nearly al... | astro-ph_GA |
Increasing the Scientific Return of Stellar Orbits at the Galactic
Center: We report a factor of $\sim$3 improvement in Keck Laser Guide Star Adaptive
Optics (LGSAO) astrometric measurements of stars near the Galaxy's supermassive
black hole (SMBH). By carrying out a systematic study of M92, we have produced
a more a... | astro-ph_GA |
The Presence of Weak Active Galactic Nuclei in High Redshift Star
Forming Galaxies: We present [OIII 5007A] observations of the star forming galaxy HDF-BMZ1299
(z=1.598) using Keck Observatory's Adaptive Optics system with the
near-infrared integral field spectrograph OSIRIS. Using previous Halpha and
[NII] measureme... | astro-ph_GA |
CO, H2O, H2O+ line and dust emission in a z = 3.63 strongly lensed
starburst merger at sub-kiloparsec scales: Using ALMA, we report high angular-resolution observations of the redshift
z=3.63 galaxy, G09v1.97, one of the most luminous strongly lensed galaxies
discovered by the H-ATLAS survey. We present 0"2-0"4 resol... | astro-ph_GA |
Planetary Nebula Candidates Uncovered with the HASH Research Platform: A detailed examination of new high quality radio catalogues (e.g. Cornish) in
combination with available mid-infrared (MIR) satellite imagery (e.g. Glimpse)
has allowed us to find 70 new planetary nebula (PN) candidates based on
existing knowledge o... | astro-ph_GA |
New insights on the recoiling/binary black hole candidate J0927+2943 via
molecular gas observations: The peculiar QSO J0927+2943 shows multiple sets of emission lines in its
optical spectrum. This signature has been interpreted as the relative motion
between a black hole, either recoiling or bound in a binary system,... | astro-ph_GA |
AGN feedback duty cycle in Planck SZ selected clusters using Chandra
observations: We present a systematic study of X-ray cavities using archival Chandra
observations of nearby galaxy clusters selected by their Sunyaev-Zel'dovich
(SZ) signature in the Planck survey, which provides a nearly unbiased
mass-selected samp... | astro-ph_GA |
Binary Frequencies in Globular Clusters: Binary stars are predicted to have an important role in the evolution of
globular clusters, so we obtained binary fractions for 35 globular clusters
that were imaged in the F606W and F814W with the ACS on the Hubble Space
Telescope. When compared to the values of prior efforts (... | astro-ph_GA |
Origin of reduced dynamical friction by dark matter halos with net
prograde rotation: We provide an explanation for the reduced dynamical friction on galactic bars
in spinning dark matter halos. Earlier work based on linear theory predicted an
increase in dynamical friction when dark halos have a net forward rotation... | astro-ph_GA |
Multi-Element Abundance Measurements from Medium-Resolution Spectra. IV.
Alpha Element Distributions in Milky Way Dwarf Satellite Galaxies: We derive the star formation histories of eight dwarf spheroidal (dSph) Milky
Way satellite galaxies from their alpha element abundance patterns. Nearly 3000
stars from our previ... | astro-ph_GA |
High-quality strong lens candidates in the final Kilo Degree survey
footprint: We present 97 new high-quality strong lensing candidates found in the final
$\sim 350\,\rm deg^2$, that completed the full $\sim 1350\,\rm deg^2$ area of
the Kilo-Degree Survey (KiDS). Together with our previous findings, the final
list of... | astro-ph_GA |
Rapid dynamical mass segregation and properties of fractal star clusters: We investigate the evolution of young star clusters using N-body simulations.
We confirm that subvirial and fractal-structured clusters will dynamically mass
segregate on a short timescale (within 0.5 Myr). We adopt a modified
minimum-spanning-tr... | astro-ph_GA |
The Universe is at Most 88% Neutral at z=10.6: Recent observations of GN-z11 with JWST have revealed a Ly$\alpha$ emission
line with an equivalent width of 18$\pm 2$ angstroms. At z=10.6, this galaxy is
expected to lie in the heart of reionization. We use a series of inhomogeneous
reionization simulations to derive the... | astro-ph_GA |
Ionization compression impact on dense gas distribution and star
formation, Probability density functions around H ii regions as seen by
Herschel: Ionization feedback should impact the probability distribution function (PDF)
of the column density around the ionized gas. We aim to quantify this effect
and discuss it... | astro-ph_GA |
Exploring AGN - starburst coexistence in galaxies at z$\sim$ 0.8 by the
[OIII]4959+5007/[OIII]4363 line ratio: We analyze by detailed modelling the spectra observed from the sample
galaxies at z$\sim$0.8 presented by Ly et al (2015), constraining the models by
the [OIII]5007+4959/[OIII]4363 line ratios. Composite mod... | astro-ph_GA |
A Photometric and Kinematic Analysis of UDG1137+16 (dw1137+16): Probing
Ultra-Diffuse Galaxy Formation in a Group Environment: The dominant physical formation mechanism(s) for ultra-diffuse galaxies
(UDGs) is still poorly understood. Here, we combine new, deep imaging from the
Jeanne Rich Telescope with deep integral... | astro-ph_GA |
Physical properties of circumnuclear ionising clusters. II. NGC 7469: Circumnuclear star forming regions (CNSFR) are massive clusters found close
to galactic nuclei. These entities give us an excellent opportunity to study
star formation in environments with high metallicity and to relate it with
active galactic nuclei... | astro-ph_GA |
First images of the molecular gas around a born-again star revealed by
ALMA: Born-again stars allow probing stellar evolution in human timescales and
provide the most promising path for the formation of hydrogen-deficient
post-asymptotic giant branch objects, but their cold and molecular components
remain poorly expl... | astro-ph_GA |
An [$α$/Fe]-enhanced thick disk in a Milky Way Analogue: The Milky Way disk consists of two prominent components - a thick,
alpha-rich, low-metallicity component and a thin, metal-rich, low-alpha
component. External galaxies have been shown to contain thin and thick disk
components, but whether distinct components in t... | astro-ph_GA |
Galactic Orbits of Globular Clusters in the Region of the Galactic Bulge: Galactic orbits have been constructed over long time intervals for ten
globular clusters located near the Galactic center. A model with an axially
symmetric gravitational potential for the Galaxy was initially applied, after
which a non-axially s... | astro-ph_GA |
Cosmic rays in molecular clouds probed by H$_{2}$ rovibrational lines --
Perspectives for the James Webb Space Telescope: Cosmic rays (CRs) at sub-TeV energies play a fundamental role in the chemical
and dynamical evolution of molecular clouds, as they control the ionisation,
dissociation, and excitation of H$_{2}$. ... | astro-ph_GA |
A Gaia based photometric and kinematic analysis of the old open cluster
King 11: This paper presents an investigation of an old age open cluster King 11 using
Gaia's Early Data Release 3 (EDR3) data. Considering the stars with membership
probability ($P_{\mu}$) $> 90\%$, we identified 676 most probable cluster
member... | astro-ph_GA |
Star formation in the outskirts of DDO 154: A top-light IMF in a nearly
dormant disc: We present optical photometry of Hubble Space Telescope (HST) ACS/WFC data of
the resolved stellar populations in the outer disc of the dwarf irregular
galaxy DDO 154. The photometry reveals that young main sequence stars are
almost... | astro-ph_GA |
The nuclear properties and extended morphologies of powerful radio
galaxies: the roles of host galaxy and environment: Powerful radio galaxies exist as either compact or extended sources, with the
extended sources traditionally classified by their radio morphologies as
Fanaroff--Riley (FR) type I and II sources. FRI/... | astro-ph_GA |
Preliminary results of using k-Nearest Neighbours Regression to estimate
the redshift of radio selected datasets: In the near future, all-sky radio surveys are set to produce catalogues of
tens of millions of sources with limited multi-wavelength photometry.
Spectroscopic redshifts will only be possible for a small f... | astro-ph_GA |
The WISSH quasars project XI. The mean Spectral Energy Distribution and
Bolometric Corrections of the most luminous quasars: Hyper-luminous Quasi-Stellar Objects (QSOs) represent the ideal laboratory to
investigate Active Galactic Nuclei (AGN) feedback mechanism since their
formidable energy release causes powerful w... | astro-ph_GA |
Period-Luminosity Relations for Galactic classical Cepheids in the Sloan
bands: We present the first period-luminosity (PL) and period-Wesenheit (PW)
relations in the Sloan-Pans-STARRS gP1rP1iP1 bands for classical fundamental
mode Cepheids in the Milky Way. We used a relatively modest number of 76 stars
for the PL a... | astro-ph_GA |
AGN-driven Cold Gas Outflow of NGC 1068 Characterized by
Dissociation-Sensitive Molecules: Recent developments in (sub-)millimeter facilities have drastically changed
the amount of information obtained from extragalactic spectral scans. In this
paper, we present a feature extraction technique using principal componen... | astro-ph_GA |
Extremely inverted peaked spectrum radio sources: We report our ongoing search for extremely inverted spectrum compact radio
galaxies, for which the defining feature in the radio spectrum is not the
spectral peak, but instead the slope of the spectrum (alpha) in the
high-opacity (i.e., lower frequency) part of the radi... | astro-ph_GA |
Discovery of a very Lyman-$α$-luminous quasar at z=6.62: Distant luminous quasars provide important information on the growth of the
first supermassive black holes, their host galaxies and the epoch of
reionization. The identification of quasars is usually performed through
detection of their Lyman-$\alpha$ line redshi... | astro-ph_GA |
Lens galaxies in the Illustris simulation: power-law models and the bias
of the Hubble constant from time-delays: A power-law density model, i.e., $\rho(r) \propto r^{-\gamma'}$ has been
commonly employed in strong gravitational lensing studies, including the
so-called time-delay technique used to infer the Hubble co... | astro-ph_GA |
Magnetic field measurement in TMC-1C using 22.3 GHz CCS Zeeman splitting: Measurement of magnetic fields in dense molecular clouds is essential for
understanding the fragmentation process prior to star formation. Radio
interferometric observations of CCS 22.3 GHz emission, from the starless core
TMC-1C, have been carri... | astro-ph_GA |
Kinematics and Mass Modeling of Messier 33: Halpha observations: As part of a long-term project to revisit the kinematics and dynamics of the
large disc galaxies of the Local Group, we present the first deep, wide-field
(42' x 56') 3D-spectroscopic survey of the ionized gas disc of Messier 33.
Fabry-Perot interferometr... | astro-ph_GA |
Mid Infrared View of the High Mass Star Formation Region W51A: In this paper we present the results of a mid infrared study of G49.5-0.4, or
W51A, part of the massive starbirth complex W51. Combining public data from the
$Spitzer$ IRAC camera, and Gemini mid infrared camera T-ReCS at 7.73, 9.69,
12.33 and 24.56 \micron... | astro-ph_GA |
How the power spectrum of dust continuum images may hide the presence of
a characteristic filament width: Herschel observations of interstellar clouds support a paradigm for star
formation in which filaments play a central role. One of the foundations of
this paradigm is the finding, based on studies of the radial co... | astro-ph_GA |
An accurate low-redshift measurement of the cosmic neutral hydrogen
density: Using a spectral stacking technique, we measure the neutral hydrogen (HI)
properties of a sample of galaxies at $z < 0.11$ across 35 pointings of the
Westerbork Synthesis Radio Telescope (WSRT). The radio data contains 1,895
galaxies with re... | astro-ph_GA |
Stellar Velocity Dispersion in Mergers: The Effects of Dust and Star
Formation: We investigate the effects of stellar evolution and dust on measurements of
stellar velocity dispersion in mergers of disk galaxies. $N$-body simulations
and radiative transfer analysis software are used to obtain mass-weighted and
flux-w... | astro-ph_GA |
Linking Compact Dwarf Starburst Galaxies in the RESOLVE Survey to
Downsized Blue Nuggets: We identify and characterize compact dwarf starburst (CDS) galaxies in the
RESOLVE survey, a volume-limited census of galaxies in the local universe, to
probe whether this population contains any residual ``blue nuggets,'' a cla... | astro-ph_GA |
Bivariate Luminosity Function of Galaxy Pairs: We measure the bivariate luminosity function (BLF) of galaxy pairs and use it
to probe and characterize the galaxy-galaxy interaction between pair members.
The galaxy pair sample is selected from the main galaxy sample of Sloan Digital
Sky Survey and supplied with a signif... | astro-ph_GA |
How do disks and planetary systems in high-mass open clusters differ
from those around field stars?: Only star clusters that are sufficiently compact and massive survive largely
unharmed beyond 10 Myr. However, their compactness means a high stellar density
which can lead to strong gravitational interactions between ... | astro-ph_GA |
The Mass Distributions of Starless and Protostellar Cores in Gould Belt
Clouds: Using data from the SCUBA Legacy Catalogue (850 um) and Spitzer Space
Telescope (3.6 - 70 um), we explore dense cores in the Ophiuchus, Taurus,
Perseus, Serpens, and Orion molecular clouds. We develop a new method to
discriminate submilli... | astro-ph_GA |
On the relation of host properties and environment of AGN galaxies
across the standard optical diagnostic diagram: We study the host properties and environment of active galactic nuclei (AGNs)
galaxies, taken from SDSS-DR12, across the $\text{[O III]}/\text{H}\beta$ vs
$\text{[N II]}/\text{H}\alpha$ diagnostic diagra... | astro-ph_GA |
Long-term optical spectral monitoring of a changing-look AGN NGC 3516 I:
Continuum and broad-line flux variability: Here we present the long-term optical spectral monitoring of a changing-look
active galactic nuclei (AGN) NGC 3516 that covers 22 years (from 1996 to 2018).
We explore a variability in the broad lines a... | astro-ph_GA |
Formation of supermassive stars in the first star clusters: The formation of supermassive stars is believed to be an essential
intermediate step for the formation of the massive black hole seeds that become
the supermassive black holes powering the quasars observed in the early
Universe. Numerical simulations have show... | astro-ph_GA |
Galactic Disk Bulk Motions as Revealed by the LSS-GAC DR2: We report a detailed investigation of the bulk motions of the nearby Galactic
stellar disk, based on three samples selected from the LSS-GAC DR2: a global
sample containing 0.57 million FGK dwarfs out to $\sim$ 2 kpc, a local subset
of the global sample consist... | astro-ph_GA |
Carbon, nitrogen and oxygen abundance gradients in M101 and M31: We present deep spectrophotometry of 18 HII regions in the nearby massive
spiral galaxies M101 and M31. We have obtained direct determinations of
electron temperature in all the nebulae. We detect the CII 4267 line in several
HII regions, permitting to de... | astro-ph_GA |
Size, shade or shape? The contribution of galaxies of different types to
the star-formation history of the Universe from SDSS-IV MaNGA: By fitting stellar populations to SDSS-IV MaNGA survey observations of ~7000
suitably-weighted individual galaxies, we reconstruct the star-formation
history of the Universe, which w... | astro-ph_GA |
Wide field polarimetry around the Perseus cluster at 350 MHz: This paper investigates the fascinating diffuse polarization structures at
350 MHz that have previously been tentatively attributed to the Perseus cluster
and, more specifically, tries to find out whether the structures are located at
(or near) the Perseus c... | astro-ph_GA |
The interacting late-type host galaxy of the radio-loud narrow-line
Seyfert 1 IRAS 20181-2244: Narrow-line Seyfert 1 galaxies (NLS1s) are a class of active galactic nuclei
(AGN) which are known to be one of the few sources of $\gamma$ rays, which
originate in a relativistic beamed jet. Becuase of their relatively lar... | astro-ph_GA |
Detection of Broad H$α$ Emission Lines in the Late-time Spectra of
a Hydrogen-poor Superluminous Supernova: iPTF13ehe is a hydrogen-poor superluminous supernova (SLSN) at z=0.3434, with
a slow-evolving light curve and spectral features similar to SN2007bi. It rises
within (83-148)days (rest-frame) to reach a peak bol... | astro-ph_GA |
The Local Dark Matter Density from SDSS-SEGUE G-dwarfs: We derive the local dark matter density by applying the integrated Jeans
equation method from Silverwood et al. (2016) to SDSS-SEGUE G-dwarf data
processed and presented by B\"udenbender et al. (2015). We use the MultiNest
Bayesian nested sampling software to fit ... | astro-ph_GA |
Variations of Broad Emission Lines from periodicity QSOs under the
interpretation of supermassive binary black holes with misaligned
circumbinary broad line regions: Quasars with periodic light curves are considered as candidates of
supermassive binary black hole (BBH) systems. One way for further confirmations
may... | astro-ph_GA |
The Tucana dwarf spheroidal: a distant backsplash galaxy of M31?: We use the APOSTLE Local Group (LG) cosmological hydro-simulations to examine
the properties of "backsplash" galaxies, i.e, dwarfs which were within the
virial boundaries of the Milky Way (MW) or M31 in the past, but are today
outside their virial radius... | astro-ph_GA |
LAGER Ly$α$ Luminosity Function at $z\sim7$, Implications for
Reionization: We present a new measurement of the Ly$\alpha$ luminosity function at
redshift $z=6.9$, finding moderate evolution from $z=5.7$ that is consistent
with a fully or largely ionized $z\sim7$ intergalactic medium. Our result is
based on four fiel... | astro-ph_GA |
Detailed study of the Bootes field using 300-500 MHz uGMRT observations:
Source Properties and radio--infrared correlations: The dominant source of radio continuum emissions at low frequencies is
synchrotron radiation, which originates from star-forming regions in disk
galaxies and from powerful jets produced by acti... | astro-ph_GA |
The Far-IR View of Star and Planet Forming Regions: The far-IR range is a critical wavelength range to characterize the physical
and chemical processes that transform the interstellar material into stars and
planets. Objects in the earliest phases of stellar and planet evolution release
most of their energy at these lo... | astro-ph_GA |
X-shaped Radio Galaxies: Optical Properties, Large-scale Environment and
Relationship to Radio Structure: In order to find clues to the origin of the "winged" or "X-shaped" radio
galaxies (XRGs) we investigate here the parent galaxies of a large sample of
106 XRGs for optical-radio axes alignment, interstellar medium... | astro-ph_GA |
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