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Comparing Simulated Emission from Molecular Clouds Using Experimental
Design: We propose a new approach to comparing simulated observations that enables us
to determine the significance of the underlying physical effects. We utilize
the methodology of experimental design, a subfield of statistical analysis, to
establ... | astro-ph_GA |
Discovery of the elusive thioketenylium, HCCS+, in TMC-1: We report the detection in TMC-1 of the cation HCCS+ (3Sigma-), which is the
protonated form of the widespread radical CCS. This is the first time that a
protonated radical has been detected in a cold dark cloud. Twenty-six hyperfine
components from twelve rotat... | astro-ph_GA |
A New Multi-Tracer Approach to Defining the Spiral arm width in the
Milky Way: We analyze recent observations of the spiral arm width in the Milky Way, as a
function of the galactic radius, and we compare this relation with the
prediction from the density wave theory. We use the following method: in each
spiral arm, ... | astro-ph_GA |
History and destiny of an emerging early-type galaxy: New IFU insights
on the major-merger remnant NGC7252: NGC7252, which is one of the nearest major-merger galaxy remnants, is an
ideal laboratory to study the processes inherent to the transformation of disc
galaxies to ellipticals as observed about ~1Gyr after the ... | astro-ph_GA |
Tightening the belt: Constraining the mass and evolution in SDC335: Recent ALMA observations identified one of the most massive star-forming
cores yet observed in the Milky Way; SDC335-MM1, within the infrared dark cloud
SDC335.579-0.292. Along with an accompanying core MM2, SDC335 appears to be in
the early stages of ... | astro-ph_GA |
Modeling and Analysis of a Spectrum of the Globular Cluster NGC 2419: NGC 2419 is the most distant massive globular cluster in the outer Galactic
halo. It is unusual also due to the chemical peculiarities found in its red
giant stars in recent years. We study the stellar population of this unusual
object using spectra ... | 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 |
The chemical structure of young high-mass star-forming clumps: (II)
parsec-scale CO depletion and deuterium fraction of $\rm HCO^+$: The physical and chemical properties of cold and dense molecular clouds are
key to understanding how stars form. Using the IRAM 30 m and NRO 45 m
telescopes, we carried out a Multiwavel... | astro-ph_GA |
Revisiting the alignment of radio galaxies in the ELAIS-N1 field: Aims. Previous studies reported an alignment of the major axes of radio
galaxies on various angular scales. Here, we study the alignment of radio
galaxies in the ELAIS-N1 Low Frequency ARray (LOFAR) deep field, which covers
an area of 25 $\rm deg^2$. \ne... | astro-ph_GA |
The Thirteenth Data Release of the Sloan Digital Sky Survey: First
Spectroscopic Data from the SDSS-IV Survey MApping Nearby Galaxies at Apache
Point Observatory: The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began
observations in July 2014. It pursues three core programs: APOGEE-2, MaNGA, and
eBO... | astro-ph_GA |
Is there a maximum mass for black holes in galactic nuclei?: The largest observed supermassive black holes (SMBHs) have a mass of M_BH ~
10^{10} M_sun, nearly independent of redshift, from the local (z~0) to the
early (z>6) Universe. We suggest that the growth of SMBHs above a few 10^{10}
M_sun is prevented by small-sc... | astro-ph_GA |
Machine Learning for Galactic Archaeology: A chemistry-based neural
network method for identification of accreted disc stars: We develop a method ('Galactic Archaeology Neural Network', GANN) based on
neural network models (NNMs) to identify accreted stars in galactic discs by
only their chemical fingerprint and age,... | astro-ph_GA |
A population of ultraviolet-dim protoclusters detected in absorption: Galaxy protoclusters, which will eventually grow into the massive clusters we
see in the local universe, are usually traced by locating overdensities of
galaxies. Large spectroscopic surveys of distant galaxies now exist, but their
sensitivity depend... | astro-ph_GA |
Two step ejection of massive stars and the issue of their formation in
isolation: In this paper we investigate the combined effect of massive binary ejection
from star clusters and a second acceleration of a massive star during a
subsequent supernova explosion. We call this the "two-step-ejection" scenario.
The main ... | astro-ph_GA |
The chemical evolution of galaxies with a variable IGIMF: Standard analytical chemical evolution modelling of galaxies has been
assuming the stellar initial mass function (IMF) to be invariant and fully
sampled allowing fractions of massive stars to contribute even in dwarf
galaxies with very low star formation rates (... | astro-ph_GA |
Galaxy stellar mass assembly: the difficulty matching observations and
semi-analytical predictions: Semi-analytical models (SAMs) are currently the best way to understand the
formation of galaxies within the cosmic dark-matter structures. While they
fairly well reproduce the local stellar mass functions, correlation ... | astro-ph_GA |
A First Look at Galaxy Flyby Interactions. II. Do Flybys matter?: In the second paper of this series, we present results from cosmological
simulations on the demographics of flyby interactions to gauge their potential
impact on galaxy evolution. In a previous paper, we demonstrated that flybys --
an interaction where t... | astro-ph_GA |
Relativistic dynamics of stars near a supermassive black hole: General relativistic precession limits the ability of gravitational
encounters to increase the eccentricity $e$ of orbits near a supermassive black
hole (SBH). This "Schwarzschild barrier" (SB) has been shown to play an
important role in the orbital evoluti... | astro-ph_GA |
Statistical association between the candidate repeating FRB 20200320A
and a galaxy group: We present results from angular cross-correlations between select samples of
CHIME/FRB repeaters and galaxies in three photometric galaxy surveys, which
have shown correlations with the first CHIME/FRB catalog containing repeati... | astro-ph_GA |
Spatial Decorrelation of Young Stars and Dense Gas as a Probe of the
Star Formation-Feedback Cycle in Galaxies: The spatial decorrelation of dense molecular gas and young stars observed on
$\lesssim 1$ kiloparsec scales in nearby galaxies indicates rapid dispersal of
star-forming regions by stellar feedback. We explo... | astro-ph_GA |
NOEMA spatially resolved view of the multi-phase outflow in
IRAS17020+4544: a shocked wind in action?: The Narrow Line Seyfert 1 Galaxy IRAS17020+4544 is one of the few AGN where a
galaxy-scale energy-conserving outflow was revealed. This paper reports on
NOEMA observations addressed to constrain the spatial scale of... | astro-ph_GA |
Subaru Hyper Suprime-Cam Survey of Cygnus OB2 Complex -- I:
Introduction, Photometry and Source Catalog: Low mass star formation inside massive clusters is crucial to understand the
effect of cluster environment on processes like circumstellar disk evolution,
planet and brown dwarf formation. The young massive associ... | astro-ph_GA |
Constraints on the non-thermal desorption of methanol in the cold core
LDN 429-C: Cold cores are an early step of star formation, characterized by densities >
10$^4$ cm$^{-3}$, low temperatures (< 15 K), and very low external UV
radiation. We investigate the physico-chemical processes at play to tracing the
origin of... | astro-ph_GA |
Low-Redshift Lyman Limit Systems as Diagnostics of Cosmological Inflows
and Outflows: We use cosmological hydrodynamic simulations with stellar feedback from the
FIRE project to study the physical nature of Lyman limit systems (LLSs) at z<1.
At these low redshifts, LLSs are closely associated with dense gas structure... | astro-ph_GA |
Detection of Cosmic Fullerenes in the Almahata Sitta Meteorite: Are They
an Interstellar Heritage?: Buckminsterfullerene, C60 , is the largest molecule observed to date in
interstellar and circumstellar environments. The mechanism of formation of this
molecule is actively debated. Despite targeted searches in primiti... | astro-ph_GA |
Luminous Quasars Do Not Live in the Most Overdense Regions of Galaxies
at z~4: We present the cross-correlation between 151 luminous quasars ($M_{
\mathrm{UV}} < -26$) and 179 protocluster candidates at $z \sim 3.8$, extracted
from the Wide imaging survey ($ \sim 121~ $deg$^2$) performed with a part of
the Hyper Supr... | astro-ph_GA |
Galaxies M32 and NGC 5102 Confirm a Near-infrared Spectroscopic
Chronometer: We present near infrared (NIR) IRTF/SpeX spectra of the intermediate-age
galaxy M32 and the post-starburst galaxy NGC 5102. We show that features from
thermally-pulsing asymptotic giant branch (TP-AGB) and main sequence turn-off
(MSTO) stars... | astro-ph_GA |
EMPRESS. VI. Outflows Investigated in Low-Mass Galaxies with
$M_*=10^4-10^7~M_\odot$: Weak Feedback in Low-Mass Galaxies?: We study emission line profiles of 21 nearby low-mass
($M_*=10^4-10^7~M_\odot$) galaxies in deep medium-high resolution spectra taken
with Magellan/MagE. These low-mass galaxies are actively star... | astro-ph_GA |
Dynamics of Starbursting Dwarf Galaxies. III. A HI study of 18 nearby
objects: We investigate the dynamics of starbursting dwarf galaxies, using both new
and archival HI observations. We consider 18 nearby galaxies that have been
resolved into single stars by HST observations, providing their star formation
history a... | astro-ph_GA |
The Velocity Statistics of Turbulent Clouds in the Presence of Gravity,
Magnetic fields, Radiation, and Outflow Feedback: The interaction of turbulence, magnetic fields, self-gravity, and stellar
feedback within molecular clouds is crucial for understanding star formation.
We study the effects of self-gravity and out... | astro-ph_GA |
General spherical anisotropic Jeans models of stellar kinematics:
including proper motions and radial velocities: Cappellari (2008) presented a flexible and efficient method to model the
stellar kinematics of anisotropic axisymmetric and spherical stellar systems.
The spherical formalism could be used to model the li... | astro-ph_GA |
Formation channels of slowly rotating early-type galaxies: We study the evidence for a diversity of formation processes in early-type
galaxies by presenting the first complete volume-limited sample of slow
rotators with both integral-field kinematics from the ATLAS3D Project and high
spatial resolution photometry from ... | astro-ph_GA |
Polarised radio filaments outside the Galactic plane: We used data from the \wmap satellite at 23, 33 and 41 GHz to study the
diffuse polarised emission over the entire sky. The emission originates mostly
from filamentary structures with well-ordered magnetic fields. Some of these
structures have been known for decades... | astro-ph_GA |
The KMOS Cluster Survey (KCS) I: The fundamental plane and the formation
ages of cluster galaxies at redshift $1.4<z<1.6$: We present the analysis of the fundamental plane (FP) for a sample of 19
massive red-sequence galaxies ($M_{\star} >4\times10^{10} M_{\odot}$) in 3
known overdensities at $1.39<z<1.61$ from the K... | astro-ph_GA |
Deuterium fractionation of nitrogen hydrides: detections of NHD and
ND$_2$: Although ammonia is an abundant molecule commonly observed towards the dense
interstellar medium, it has not yet been established whether its main formation
route is from gas-phase ion-molecule reactions or grain-surface hydrogen
additions on... | astro-ph_GA |
NGC5694: another extra-galactic globular cluster: We discuss the chemical composition of six giant stars of the outer Halo
globular cluster NGC5694, through the analysis of UVES@FLAMES high-resolution
spectra. The cluster has an average iron content [Fe/H]=--1.83+-0.01,
solar-scaled [alpha/Fe] ratios and a very low Ba ... | astro-ph_GA |
Polarisation properties of Milky-Way-like galaxies: (Abridged) We study the polarisation properties, magnetic field strength, and
synchrotron emission scale-height of Milky-Way-like galaxies in comparison with
other spiral galaxies. We use our 3D-emission model of the Milky Way Galaxy for
viewing the Milky Way from out... | astro-ph_GA |
Intrinsic shapes of Brightest Cluster Galaxies: We discuss the statistical distribution of galaxy shapes and viewing angles
under the assumption of triaxiality by deprojecting observed Surface Brightness
(SB) profiles of 56 Brightest Cluster Galaxies coming from a recently published
large deep-photometry sample. For th... | astro-ph_GA |
Slingshot Mechanism for Clusters: Gas Density Regulates Star Density in
the Orion Nebula Cluster (M42): We characterize the stellar and gas volume density, potential, and
gravitational field profiles in the central $\sim$ 0.5 pc of the Orion Nebula
Cluster (ONC), the nearest embedded star cluster (or rather, proto-cl... | astro-ph_GA |
Gas contents of galaxy groups from thermal Sunyaev-Zel'dovich effects: A matched filter technique is applied to the Planck all-sky Compton
y-parameter map to measure the thermal Sunyaev-Zel'dovich (tSZ) effect produced
by galaxy groups of different halo masses selected from large redshift surveys
in the low-z Universe.... | astro-ph_GA |
Statistical properties and correlation length in star-forming molecular
clouds: II. Gravitational potential and virial parameter: In the first article of this series, we have used the ergodic theory to
assess the validity of a statistical approach to characterize various
properties of star-forming molecular clouds (M... | astro-ph_GA |
Proper Motions of Stellar Streams Discovered in the Dark Energy Survey: We cross-match high-precision astrometric data from Gaia DR2 with accurate
multi-band photometry from the Dark Energy Survey (DES) DR1 to confidently
measure proper motions for nine stellar streams in the DES footprint: Aliqa
Uma, ATLAS, Chenab, El... | astro-ph_GA |
The Ties that Bind? Galactic Magnetic Fields and Ram Pressure Stripping: One process affecting gas-rich cluster galaxies is ram pressure stripping,
i.e. the removal of galactic gas through direct interaction with the
intracluster medium. Galactic magnetic fields may have an important impact on
the stripping rate and ta... | astro-ph_GA |
Time Variation of Fine-Structure Constant Constrained by [O III]
Emission-Lines at 1.1<z<3.7: [O III]$\lambda\lambda$4960,5008 doublet are often the strongest narrow
emission lines in starburst galaxies and quasi-stellar objects (QSOs), and thus
are a promising probe to possible variation of the fine-structure consta... | astro-ph_GA |
HH 223: a parsec-scale H2 outflow in the star-forming region L723: The dark cloud Lynds 723 (L723) is a low-mass star-forming region where one
of the few known cases of a quadrupolar CO outflow has been reported. Two
recent works have found that the radio continuum source VLA 2, towards the
centre of the CO outflow, is... | astro-ph_GA |
No Redshift Evolution in the Broad Line Region Metallicity up to z=7.54:
Deep NIR Spectroscopy of ULAS J1342+0928: We present deep (9 hours) Gemini-N/GNIRS near-infrared spectroscopic
observations of ULAS J1342+0928, a luminous quasar at z=7.54. Various broad
emission lines were detected, as well as the underlying co... | astro-ph_GA |
Probing WHIM around Galaxy Clusters with Fast Radio Bursts and the
Sunyaev-Zel'dovich effect: We propose a new method to probe the Warm Hot Intergalactic Medium (WHIM)
beyond the virial radius (R_200) of a cluster of galaxies, where X-ray
observations are not easily achievable. In this method, we use dispersion
measu... | astro-ph_GA |
New Determination of Fundamental Properties of Palomar 5 Using Deep DESI
Imaging Data: The legacy imaging surveys for the Dark Energy Spectroscopic Instrument
project provides multiplecolor photometric data, which are about 2 mag deeper
than the SDSS. In this study, we redetermine the fundamental properties for an
ol... | astro-ph_GA |
Magnetic field structure in the Flattened Envelope and Jet in the young
protostellar system HH 211: HH 211 is a young Class 0 protostellar system, with a flattened envelope, a
possible rotating disk, and a collimated jet. We have mapped it with the
Submillimeter Array in 341.6 GHz continuum and SiO J=8-7 at ~ 0.6 res... | astro-ph_GA |
The Distance and Peculiar Velocity of the Norma cluster (ACO 3627) using
the Near-Infrared $J$ and $K_s$-band Fundamental Plane Relations: We report distance measurements for the Norma cluster based on the
near-infrared $J$- and $K_s$-band Fundamental Plane (FP) relations. Our
simultaneous $J$ and $K_s$-band photomet... | astro-ph_GA |
The evolution of the galaxy content of dark matter haloes: We use the halo occupation distribution (HOD) framework to characterise the
predictions from two independent galaxy formation models for the galactic
content of dark matter haloes and its evolution with redshift. Our galaxy
samples correspond to a range of fixe... | astro-ph_GA |
A Multi-Scale Study of Star Formation in Messier 33: For the Local Group Scd galaxy M 33 this paper presents a multi-scale study
of the relationship between the monochromatic star formation rate (SFR)
estimator based on 12 $\mu$m emission and the total SFR estimator based on a
combination of far-ultraviolet and 24 $\mu... | astro-ph_GA |
Gravitational Encounters and the Evolution of Galactic Nuclei. IV.
Captures Mediated by Gravitational-Wave Energy Loss: Direct numerical integrations of the two-dimensional Fokker-Planck equation
are carried out for compact objects orbiting a supermassive black hole (SBH) at
the center of a galaxy. As in Papers I-III... | astro-ph_GA |
The SAMI Galaxy Survey: the third and final data release: We have entered a new era where integral-field spectroscopic surveys of
galaxies are sufficiently large to adequately sample large-scale structure over
a cosmologically significant volume. This was the primary design goal of the
SAMI Galaxy Survey. Here, in Data... | astro-ph_GA |
Stellar population synthesis based modelling of the Milky Way using
asteroseismology of dwarfs and subgiants from Kepler: Early attempts to apply asteroseismology to study the Galaxy have already
shown unexpected discrepancies for the mass distribution of stars between the
Galactic models and the data; a result that ... | astro-ph_GA |
Note on fundamental physics tests from black hole imaging: Comment on
"Hunting for extra dimensions in the shadow of Sagittarius A$^*$": Several works over the past years have discussed the possibility of testing
fundamental physics using Very Long Baseline Interferometry horizon-scale black
hole (BH) images, such as... | astro-ph_GA |
Ultra-compact Embedded Clusters in the Galactic Plane: We have identified a previously unrecognized population of very compact,
embedded low-mass Galactic stellar clusters. These tight (r$ \approx $0.14 pc)
groupings appear as bright singular objects at the few arcsec resolution of the
Spitzer Space Telescope at 8 and ... | astro-ph_GA |
Collisional excitation of methyl (iso)cyanide by He atoms: rate
coefficients and isomerism effects: Among all closed-shell species observed in molecular clouds, molecules with
C$_{3v}$ symmetry play a crucial role, as their rotational spectroscopy allows
them to behave as a gas thermometer. In the interstellar medium... | astro-ph_GA |
Delving deep: a population of extremely dusty dwarfs observed by JWST: We take advantage of the NIRCam photometric observations available as part of
the Cosmic Evolution Early Release Science survey (CEERS) to identify and
analyse very red sources in an effort to discover very dusty star forming
galaxies. We select red... | astro-ph_GA |
Spin Temperature and Density of Cold and Warm HI in the Galactic Disk -
Hidden HI -: We present a method to determine the spin temperature $T_{\rm S}$ and volume
density $n$ of HI gas simultaneously along the tangent-point circle of galactic
rotation in the Milky Way by using the least-$\chi^2$ method. The best-fit
$... | astro-ph_GA |
Rotation Curve Anomaly and Galactic Warp in M51: We revisit the anomaly of rotation curve in the nearly face-on galaxy M51
that shows an apparently faster decrease of rotation velocity than the
Keplerian law in the outer disk, further showing apparent counter rotation in
the outermost HI disk. We interpret this anomaly... | astro-ph_GA |
No correlation of the Lyman continuum escape fraction with spectral
hardness: The properties that govern the production and escape of hydrogen ionizing
photons (Lyman continuum, LyC; with energies >13.6 eV) in star-forming galaxies
are still poorly understood, but they are key to identifying and characterizing
the so... | astro-ph_GA |
Evolution of spatio-kinematic structures in star-forming regions: are
Friends of Friends worth knowing?: The Friends of Friends algorithm identifies groups of objects with similar
spatial and kinematic properties, and has recently been used extensively to
quantify the distributions of gas and stars in young star-form... | astro-ph_GA |
Testing PDR models against ISO fine structure line data for
extragalactic sources: Far-infrared [C ii] 158 micron, [O i] 145 micron and [O i] 63 micron fine
structure emission line fluxes were measured from archival Infrared Space
Observatory Long Wavelength Spectrometer spectra of 46 extragalactic sources,
with 28 s... | astro-ph_GA |
Spatially resolved observations of outflows in the radio loud AGN of UGC
8782: We use optical Integral Field Spectroscopy (IFU) to study the gas emission
structure and kinematics in the inner 3.4$\times$4.9 kpc$^2$ region of the
galaxy UGC 8782 (3C 293), host of a radio loud Active Galactic Nucleus (AGN).
The observa... | astro-ph_GA |
Studies of Anomalous Microwave Emission (AME) with the SKA: In this chapter, we will outline the scientific motivation for studying
Anomalous Microwave Emission (AME) with the SKA. AME is thought to be due to
electric dipole radiation from small spinning dust grains, although thermal
fluctuations of magnetic dust grain... | astro-ph_GA |
A Carbon-rich Mira variable in a globular cluster: A stellar merger: The membership of Matsunaga's variable 1, a carbon-rich, mass-losing, Mira
variable, in the globular cluster Lynga 7 is discussed on the basis of radial
velocities. We conclude that it is a member, the first known C-Mira in a
globular cluster. Since s... | astro-ph_GA |
Extraplanar gas in Edge-on Galaxies traced by SOFIA observations of [C
II]: Bursts of localized star formation in galaxies can levitate material from
their midplanes. Spiral galaxies that are edge-on allow clear distinction of
material that is levitated off the galaxies' midplanes. We used SOFIA to
measure the vertic... | astro-ph_GA |
The Mass-Concentration Relation and the Stellar-to-Halo Mass Ratio in
the CFHT Stripe 82 Survey: We present a new measurement of the mass-concentration relation and the
stellar-to-halo mass ratio over the halo mass range $5\times 10^{12}$ to
$2\times 10^{14}M_{\odot}$. To achieve this, we use weak lensing measurement... | astro-ph_GA |
Massive Star Formation in the Ultraviolet Observed with the Hubble Space
Telescope: Spectroscopic observations of a massive star formation in the ultraviolet and
their interpretation are reviewed. After a brief historical retrospective, two
well-studied resolved star clusters and the surrounding H II regions are
intr... | astro-ph_GA |
Reionization with galaxies and active galactic nuclei: In this work we investigate the properties of the sources that reionized the
intergalactic medium (IGM) in the high-redshift Universe. Using a
semi-analytical model aimed at reproducing galaxies and black holes in the
first 1.5 Gyr of the Universe, we revisit the r... | astro-ph_GA |
Exploring the SDSS Photometric Galaxies with Clustering Redshifts: We apply clustering-based redshift inference to all extended sources from the
Sloan Digital Sky Survey photometric catalogue, down to magnitude r = 22. We
map the relationships between colours and redshift, without assumption of the
sources' spectral en... | astro-ph_GA |
OMEGA: OSIRIS Mapping of Emission-Line Galaxies in A901/2: This work presents the first results from an ESO Large Programme carried out
using the OSIRIS instrument on the 10m GTC telescope (La Palma). We have
observed a large sample of galaxies in the region of the Abell 901/902 system
(z ~ 0.165) which has been extens... | astro-ph_GA |
Testing the evolutionary pathways of galaxies and their supermassive
black holes and the impact of feedback from Active Galactic Nuclei via large
multiwavelength datasets: It is still a matter of intense debate how supermassive black holes (SMBH)
grow, and the role played by feedback from active galactic nuclei (AG... | astro-ph_GA |
Practical application of KAM theory to galactic dynamics: II.
Application to weakly chaotic orbits in barred galaxies: Owing to the pioneering work of Contopoulos, a strongly barred galaxy is
known to have irregular orbits in the vicinity of the bar. By definition,
irregular orbits can not be represented by action-an... | astro-ph_GA |
Can the observed E/B ratio for dust galactic foreground be explained by
sub-Alfvenic turbulence?: Recent Planck observations of dust polarization in the Galaxy have revealed
that the power in $E$ mode is twice that in $B$ mode. Caldwell et. al. have
formulated a theoretical model in the context of magnetohydrodynamic... | astro-ph_GA |
LeMMINGs. III. The e-MERLIN Legacy Survey of the Palomar sample.
Exploring the origin of nuclear radio emission in active and inactive
galaxies through the [O III] -- radio connection: What determines the nuclear radio emission in local galaxies? We combine
optical [O III] line emission, robust black hole (BH) mass... | astro-ph_GA |
3D Asymmetrical motions of the Galactic outer disk with LAMOST K giant
stars: We present a three dimensional velocity analysis of Milky Way disk kinematics
using LAMOST K giant stars and the GPS1 proper motion catalogue. We find that
Galactic disk stars near the anticenter direction (in the range of
Galactocentric di... | astro-ph_GA |
XGAPS: a sub-arcsecond cross-match of Galactic Plane Surveys: We present a sub-arcsecond cross-match of Gaia Data Release 3 (DR3) against
the INT Galactic Plane Surveys (IGAPS) and the United Kingdom Infrared Deep Sky
Survey (UKIDSS). The resulting cross-match of Galactic Plane Surveys (XGAPS)
provides additional preci... | astro-ph_GA |
An origin of narrow extended structure in the interstellar medium: an
interstellar contrail created by a fast-moving massive object: We investigate the thermal condensation caused by a massive object that
passes through the interstellar medium with high velocity, and propose a
mechanism for creating a filamentary gas... | astro-ph_GA |
Invisible Active Galactic Nuclei. II Radio Morphologies & Five New HI 21
cm Absorption Line Detections: We have selected a sample of 80 candidates for obscured radio-loud active
galactic nuclei and presented their basic optical/near-infrared (NIR)
properties in Paper 1. In this paper, we present both high-resolution ... | astro-ph_GA |
Chemically tagging the Hyades stream: Does it partly originate from the
Hyades cluster?: The Hyades stream has long been thought to be a dispersed vestige of the
Hyades cluster. However, recent analyses of the parallax distribution, of the
mass function, and of the action-space distribution of stream stars have shown... | astro-ph_GA |
Non-similar collapse of singular isothermal spherical molecular cloud
cores with nonzero initial velocities: Theoretically, stars have been formed from the collapse of cores in the
molecular clouds. Historically, the core had been assumed as an singular
isothermal sphere (SIS), and the collapse had been investigated ... | astro-ph_GA |
Relations Between Central Black Hole Mass and Total Galaxy Stellar Mass
in the Local Universe: Scaling relations between central black hole (BH) mass and host galaxy
properties are of fundamental importance to studies of BH and galaxy evolution
throughout cosmic time. Here we investigate the relationship between BH m... | astro-ph_GA |
Trigonometric Parallaxes of Four Star-forming Regions in the Distant
Inner Galaxy: We have measured trigonometric parallaxes for four water masers associated
with distant massive young stars in the inner regions of the Galaxy using the
VLBA as part of the BeSSeL Survey. G026.50$+$0.28. is located at the near end
of t... | astro-ph_GA |
First laboratory detection of vibration-rotation transitions of CH$^+$
and $^{13}$CH$^+$ and improved measurement of their rotational transition
frequencies: The long-searched C-H stretches of the fundamental ions CH$^+$ and
$^{13}$CH$^+$ have been observed for the first time in the laboratory. For
this, the state-... | astro-ph_GA |
On the lack of correlation between Mg II 2796, 2803 Angstrom and Lyman
alpha emission in lensed star-forming galaxies: We examine the Mg II 2796, 2803 Angstrom, Lyman alpha, and nebular line
emission in five bright star-forming galaxies at 1.66<z<1.91 that have been
gravitationally lensed by foreground galaxy cluster... | astro-ph_GA |
The Lyman Alpha Reference Sample XI: Efficient Turbulence Driven
Lyα Escape and the Analysis of IR, CO and [C II]158 μm: We study the global dust and (molecular) gas content in the Lyman Alpha
Reference Sample (LARS), i.e. 14 local star-forming galaxies. We characterize
their interstellar medium and relate newly deri... | astro-ph_GA |
Appearances can be deceiving: clear signs of accretion in the seemingly
ordinary Sextans dSph: We report the discovery of clear observational signs of past accretion/merger
events in one of the Milky Way satellite galaxies, the Sextans dwarf spheroidal
(dSph). These were uncovered in the spatial distribution, interna... | astro-ph_GA |
On the Precision of Full-spectrum Fitting of Stellar Populations. III.
Identifying Age Spreads: In this third paper of a series on the precision of obtaining ages of stellar
populations using the full spectrum fitting technique, we examine the precision
of this technique in deriving possible age spreads within a star... | astro-ph_GA |
An ensemble study of turbulence in extended QSO nebulae at
$z\approx0.5$--1: Turbulent motions in the circumgalactic medium (CGM) play a critical role in
regulating the evolution of galaxies, yet their detailed characterization
remains elusive. Using two-dimensional velocity maps constructed from
spatially-extended [... | astro-ph_GA |
A technique to select the most obscured galaxy nuclei: Compact obscured nuclei (CONs) are mainly found in local U/LIRGs. In the
local Universe, these sources are generally selected through the detection of
the HCN-vib (3-2) emission line at submillimetre wavelengths. In this work, we
present a diagnostic method to sele... | astro-ph_GA |
The Korean 1592--1593 Record of a Guest Star: An `impostor' of the
Cassiopeia A Supernova?: The missing historical record of the Cassiopeia A (Cas A) supernova (SN)
event implies a large extinction to the SN, possibly greater than the
interstellar extinction to the current SN remnant. Here we investigate the
possibil... | astro-ph_GA |
Some optical properties of graphite from IR to millimetric wavelengths: Far infrared(FIR) data on the optical properties of graphite are presently
lacking. An important step towards filling this gap was taken by Kuzmenko et
al. (2008) who measured, on HOPG (Highly Oriented Pyrolitic Graphite) at normal
incidence and fr... | astro-ph_GA |
Anomalous compressible mode generation by global frame projections of
pure Alfven mode: Alfven wave is the single most important physical phenomenon of
magneto-hydrodynamic turbulence and has far-reaching impact to almost all
studies related to astrophysical magnetic field. Yet the restoration of the
Alfven wave fluc... | astro-ph_GA |
Aperture and Resolution Effects on Ultraviolet Star-Forming Properties:
Insights from Local Galaxies and Implications for High-Redshift Observations: We present an analysis of the effects of spectral resolution and aperture
scales on derived galaxy properties using far-ultraviolet (FUV) spectra of
local star-forming ... | astro-ph_GA |
An Analysis of the Shapes of Interstellar Extinction Curves. VI. The
Near-IR Extinction Law: We combine new HST/ACS observations and existing data to investigate the
wavelength dependence of NIR extinction. Previous studies suggest a power-law
form, with a "universal" value of the exponent, although some recent
obser... | astro-ph_GA |
The Interstellar Medium toward the Galactic Center Source 2MASS
J17470898-2829561: We describe and discuss remarkable infrared spectra, covering key portions of
the $2-5$ $\mu$m wavelength interval, of the probable OH/IR supergiant 2MASS
J17470898$-$2829561 (2M1747), located in direction of the Sgr B molecular cloud
... | astro-ph_GA |
Magnetic Fields, Star Formation Rates and Gas Densities at Sub-kpc
Scales in a Pilot Sample of Nearby Galaxies: We have estimated the magnetic field strengths of a sample of seven galaxies
using their non-thermal synchrotron radio emission at metre wavelengths, and
assuming energy equipartition between magnetic field... | astro-ph_GA |
Herschel SPIRE-FTS Observations of Excited CO and [CI] in the Antennae
(NGC 4038/39): Warm and Cold Molecular Gas: We present Herschel SPIRE-FTS observations of the Antennae (NGC 4038/39), a
well studied, nearby ($22$ Mpc) ongoing merger between two gas rich spiral
galaxies. We detect 5 CO transitions ($J=4-3$ to $J=... | astro-ph_GA |
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