output
20102026
most citedThe Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package

5k citations

Showing 2019 · astro-ph.GAShow all

34 papers · 2 filters

astro-ph.GA2019★ 56 cited

The STRong lensing Insights into the Dark Energy Survey (STRIDES) 2017/2018 follow-up campaign: Discovery of 10 lensed quasars and 10 quasar pairs

C. Lemon, M. W. Auger, R. McMahon +65

We report the results of the STRong lensing Insights from the Dark Energy Survey (STRIDES) follow-up campaign of the late 2017/early 2018 season. We obtained spectra of 65 lensed q…

astro-ph.GA2019★ 203 cited

Milky Way Satellite Census. II. Galaxy--Halo Connection Constraints Including the Impact of the Large Magellanic Cloud

E. O. Nadler, R. H. Wechsler, K. Bechtol +63

The population of Milky Way (MW) satellites contains the faintest known galaxies and thus provides essential insight into galaxy formation and dark matter microphysics. Here we com…

astro-ph.GA2019★ 175 cited

Milky Way Satellite Census. I. The Observational Selection Function for Milky Way Satellites in DES Y3 and Pan-STARRS DR1

A. Drlica-Wagner, K. Bechtol, S. Mau +55

We report the results of a systematic search for ultra-faint Milky Way satellite galaxies using data from the Dark Energy Survey (DES) and Pan-STARRS1 (PS1). Together, DES and PS1…

astro-ph.GA2019★ 95 cited

Two Ultra-Faint Milky Way Stellar Systems Discovered in Early Data from the DECam Local Volume Exploration Survey

S. Mau, W. Cerny, A. B. Pace +56

We report the discovery of two ultra-faint stellar systems found in early data from the DECam Local Volume Exploration survey (DELVE). The first system, Centaurus I (DELVE J1238-40…

astro-ph.GA2019★ 9 cited

The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies

Kexin Guo, Luca Cortese, Danail Obreschkow +10

We use the complete Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey to determine the contribution of slow rotators, as well as different types of fast rota…

astro-ph.GA2019★ 73 cited

Birds of a Feather? Magellan/IMACS Spectroscopy of the Ultra-Faint Satellites Grus II, Tucana IV, and Tucana V

J. D. Simon, T. S. Li, D. Erkal +54

We present Magellan/IMACS spectroscopy of three recently discovered ultra-faint Milky Way satellites, Grus II, Tucana IV, and Tucana V. We measure systemic velocities of V_hel = -1…

astro-ph.GA2019★ 20 cited

Star-gas misalignment in galaxies: I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI

Donghyeon J. Khim, Sukyoung K. Yi, Yohan Dubois +12

Recent integral field spectroscopy observations have found that about 11% of galaxies show star-gas misalignment. The misalignment possibly results from external effects such as ga…

astro-ph.GA2019★ 22 cited

Galaxy And Mass Assembly (GAMA): Properties and evolution of red spiral galaxies

Smriti Mahajan, Kriti Kamal Gupta, Rahul Rana +10

We use multi-wavelength data from the Galaxy and Mass Assembly (GAMA) survey to explore the cause of red optical colours in nearby (0.002<z<0.06) spiral galaxies. We show that the…

astro-ph.GA2019★ 3 cited

Silicon and iron dust in gamma-ray burst host galaxy absorbers

T. Zafar, K. E. Heintz, A. Karakas +8

Depletion studies provide a way to understand the chemical composition of interstellar dust grains. We here examine 23 gamma-ray bursts (GRB) optical afterglow spectra (spanning 0.…

astro-ph.GA2019★ 6 cited

The SAMI Galaxy Survey: rules of behaviour for spin-ellipticity radial tracks in galaxies

Alexander Rawlings, Caroline Foster, Jesse van de Sande +18

We study the behaviour of the spin-ellipticity radial tracks for 507 galaxies from the Sydney AAO Multi-object Integral Field (SAMI) Galaxy Survey with stellar kinematics out to $\…

astro-ph.GA2019★ 94 cited

The SAMI Galaxy Survey: First detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies

C. Welker, J. Bland-Hawthorn, J. Van de Sande +16

We present the first detection of mass dependent galactic spin alignments with local cosmic filaments with over 2 sigma confidence using IFS kinematics. The 3D network of cosmic fi…

astro-ph.GA2019★ 13 cited

Star-Forming, Rotating Spheroidal Galaxies in the GAMA and SAMI Surveys

Amanda J. Moffett, Steven Phillipps, Aaron S. G. Robotham +23

The Galaxy And Mass Assembly (GAMA) survey has morphologically identified a class of "Little Blue Spheroid" (LBS) galaxies whose relationship to other classes of galaxies we now ex…

astro-ph.GA2019★ 52 cited

Search for RR Lyrae stars in DES ultra-faint systems: Grus I, Kim 2, Phoenix II, and Grus II

C. E. Martínez-Vázquez, A. K. Vivas, M. Foucoin +57

This work presents the first search for RR Lyrae stars (RRLs) in four of the ultra-faint systems imaged by the Dark Energy Survey (DES) using SOAR/Goodman and Blanco/DECam imagers.…

astro-ph.GA2019★ 16 cited

New constraints on the physical conditions in H-bearing GRB-host damped Lyman- absorbers

K. E. Heintz, J. Bolmer, C. Ledoux +25

We report the detections of molecular hydrogen (H), vibrationally-excited H (H), and neutral atomic carbon (CI), in two new afterglow spectra of GRBs\,181020A ($z=2.9…

astro-ph.GA2019★ 118 cited

Optimising Automatic Morphological Classification of Galaxies with Machine Learning and Deep Learning using Dark Energy Survey Imaging

Ting-Yun Cheng, Christopher J. Conselice, Alfonso Aragón-Salamanca +13

There are several supervised machine learning methods used for the application of automated morphological classification of galaxies; however, there has not yet been a clear compar…

astro-ph.GA2019★ 72 cited

Proper Motions of Stellar Streams Discovered in the Dark Energy Survey

N. Shipp, T. S. Li, A. B. Pace +12

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 nin…

astro-ph.GA2019★ 133 cited

The Great Escape: Discovery of a nearby 1700 km/s star ejected from the Milky Way by Sgr A*

Sergey E. Koposov, Douglas Boubert, Ting S. Li +17

We present the serendipitous discovery of the fastest Main Sequence hyper-velocity star (HVS) by the Southern Stellar Stream Spectroscopic Survey (S5). The star S5-HVS1 is a $\sim…

astro-ph.GA2019★ 123 cited

The Southern Stellar Stream Spectroscopic Survey (): Overview, Target Selection, Data Reduction, Validation, and Early Science

T. S. Li, S. E. Koposov, D. B. Zucker +29

We introduce the Southern Stellar Stream Spectroscopy Survey (), an on-going program to map the kinematics and chemistry of stellar streams in the Southern Hemisphere. The i…

astro-ph.GA2019★ 7 cited

Constraining Radio Mode Feedback in Galaxy Clusters with the Cluster Radio AGN Properties to z1

N. Gupta, M. Pannella, J. J. Mohr +58

We study the properties of the Sydney University Molonglo Sky Survey (SUMSS) 843~MHz radio AGN population in galaxy clusters from two large catalogs created using the Dark Energy S…

astro-ph.GA2019★ 30 cited

The SAMI Galaxy Survey: mass-kinematics scaling relations

Dilyar Barat, Francesco D'Eugenio, Matthew Colless +17

We use data from the Sydney-AAO Multi-object Integral-field spectroscopy (SAMI) Galaxy Survey to study the dynamical scaling relation between galaxy stellar mass and the gene…

astro-ph.GA2019★ 7 cited

Assembly bias evidence in close galaxy pairs

Ignacio Ferreras, Andrew M. Hopkins, Claudia Lagos +4

The growth channel of massive galaxies involving mergers can be studied via close pairs as putative merger progenitors, where the stellar populations of the satellite galaxies will…

astro-ph.GA2019★ 45 cited

The SAMI Galaxy Survey: Stellar population radial gradients in early-type galaxies

I. Ferreras, N. Scott, F. La Barbera +16

We study the internal radial gradients of the stellar populations in a sample comprising 522 early-type galaxies (ETGs) from the SAMI (Sydney- AAO Multi-object Integral field spect…

astro-ph.GA2019★ 12 cited

On the dust properties of high redshift molecular clouds and the connection to the 2175 Å extinction bump

K. E. Heintz, T. Zafar, A. De Cia +9

We present a study of the extinction and depletion-derived dust properties of gamma-ray burst (GRB) absorbers at showing the presence of neutral carbon (\ion{C}{I}). By mod…

astro-ph.GA2019★ 14 cited

ASKAP Commissioning Observations of the GAMA 23 Field

Denis A. Leahy, A. M. Hopkins, R. P. Norris +25

We have observed the G23 field of the Galaxy And Mass Assembly (GAMA) survey using the Australian Square Kilometre Array Pathfinder (ASKAP) in its commissioning phase, to validate…