Showing 2019 · astro-ph.GAShow all

88 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★ 46 cited

Probing black hole accretion tracks, scaling relations and radiative efficiencies from stacked X-ray active galactic nuclei

Francesco Shankar, David H. Weinberg, Christopher Marsden +25

The masses of supermassive black holes at the centres of local galaxies appear to be tightly correlated with the mass and velocity dispersions of their galactic hosts. However, the…

astro-ph.GA2019★ 92 cited

Modeling Dust and Starlight in Galaxies Observed by Spitzer and Herschel: The KINGFISH Sample

G. Aniano, B. T. Draine, L. K. Hunt +30

Dust and starlight are modeled for the KINGFISH project galaxies. With data from 3.6 micron to 500 micron, models are strongly constrained. For each pixel in each galaxy we estimat…

astro-ph.GA2019★ 115 cited

An image of the dust sublimation region in the nucleus of NGC 1068

GRAVITY Collaboration, O. Pfuhl, R. Davies +40

We present near-infrared interferometric data on the Seyfert 2 galaxy NGC 1068, obtained with the GRAVITY instrument on the European Southern Observatory Very Large Telescope Inter…

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★ 1.5k cited

The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra

Romina Ahumada, Carlos Allende Prieto, Andres Almeida +310

This paper documents the sixteenth data release (DR16) from the Sloan Digital Sky Surveys; the fourth and penultimate from the fourth phase (SDSS-IV). This is the first release of…

astro-ph.GA2019★ 64 cited

The EDGE-CALIFA Survey: Using Optical Extinction to Probe the Spatially-Resolved Distribution of Gas in Nearby Galaxies

Jorge K. Barrera-Ballesteros, Dyas Utomo, Alberto D. Bolatto +11

We present an empirical relation between the cold gas surface density () and the optical extinction () in a sample of 103 galaxies from the Extragalactic Da…

astro-ph.GA2019★ 49 cited

Star Formation in Isolated Dwarf Galaxies Hosting Tidal Debris: Extending the Dwarf-Dwarf Merger Sequence

Erin Kado-Fong, Jenny E. Greene, Johnny P. Greco +4

Like massive galaxies, dwarf galaxies are expected to undergo major mergers with other dwarfs. However, the end state of these mergers and the role that merging plays in regulating…

astro-ph.GA2019★ 13 cited

Broadband X-ray observations of four gamma-ray narrow-line Seyfert 1 galaxies

M. Berton, V. Braito, S. Mathur +4

Narrow-line Seyfert 1 galaxies (NLS1s) is one of the few classes of active galactic nuclei (AGN) harboring powerful relativistic jets and detected in rays. NLS1s are well-known…

astro-ph.GA2019★ 82 cited

Direct Detection of Black Hole-Driven Turbulence in the Centers of Galaxy Clusters

Yuan Li, Marie-Lou Gendron-Marsolais, Irina Zhuravleva +16

Supermassive black holes (SMBHs) are thought to provide energy that prevents catastrophic cooling in the centers of massive galaxies and galaxy clusters. However, it remains unclea…

astro-ph.GA2019★ 292 cited

The lifecycle of molecular clouds in nearby star-forming disc galaxies

Mélanie Chevance, J. M. Diederik Kruijssen, Alexander P. S. Hygate +29

It remains a major challenge to derive a theory of cloud-scale ( pc) star formation and feedback, describing how galaxies convert gas into stars as a function of the g…

astro-ph.GA2019★ 40 cited

The headlight cloud in NGC 628: An extreme giant molecular cloud in a typical galaxy disk

Cinthya N. Herrera, Jérôme Pety, Annie Hughes +25

Cloud-scale surveys of molecular gas reveal the link between molecular clouds properties and star formation (SF) across a range of galactic environments. Cloud populations in galax…

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★ 11 cited

Chemical evolution of ultra-faint dwarf galaxies: testing the IGIMF

E. Lacchin, F. Matteucci, F. Vincenzo +1

We test the integrated galactic initial mass function (IGIMF) on the chemical evolution of 16 ultra-faint dwarf (UFD) galaxies discussing in detail the results obtained for three o…

astro-ph.GA2019★ 294 cited

A z=0 Multi-wavelength Galaxy Synthesis I: A WISE and GALEX Atlas of Local Galaxies

Adam K. Leroy, Karin M. Sandstrom, Dustin Lang +8

We present an atlas of ultraviolet and infrared images of ~15,750 local (d < 50 Mpc) galaxies, as observed by NASA's WISE and GALEX missions. These maps have matched resolution (FW…

astro-ph.GA2019★ 21 cited

Probing Structure in Cold Gas at with Gravitationally Lensed Quasar Sight Lines

Varsha P. Kulkarni, Frances H. Cashman, Sebastian Lopez +3

Absorption spectroscopy of gravitationally lensed quasars (GLQs) enables study of spatial variations in the interstellar and/or circumgalactic medium of foreground galaxies. We rep…

astro-ph.GA2019★ 80 cited

The Gas-Star Formation Cycle in Nearby Star-Forming Galaxies I. Assessment of Multi-scale Variations

Eva Schinnerer, Annie Hughes, Adam Leroy +21

The processes regulating star formation in galaxies are thought to act across a hierarchy of spatial scales. To connect extragalactic star formation relations from global and kpc-s…

astro-ph.GA2019★ 168 cited

Mapping metallicity variations across nearby galaxy disks

K. Kreckel, I. -T. Ho, G. A. Blanc +21

The distribution of metals within a galaxy traces the baryon cycle and the buildup of galactic disks, but the detailed gas phase metallicity distribution remains poorly sampled. We…

astro-ph.GA2019★ 50 cited

The Dragonfly Wide Field Survey. I. Telescope, Survey Design and Data Characterization

Shany Danieli, Deborah Lokhorst, Jielai Zhang +11

We present a description of the Dragonfly Wide Field Survey (DWFS), a deep photometric survey of a wide area of sky. The DWFS covers 330 in the equatorial GAMA fie…

astro-ph.GA2019★ 21 cited

Multi-resolution filtering: an empirical method for isolating faint, extended emission in Dragonfly data and other low resolution images

Pieter van Dokkum, Deborah Lokhorst, Shany Danieli +5

We describe an empirical, self-contained method to isolate faint, large-scale emission in imaging data of low spatial resolution. Multi-resolution filtering (MRF) uses independent…

astro-ph.GA2019★ 70 cited

The Sloan Digital Sky Survey Reverberation Mapping Project: The H Radius-Luminosity Relation

Gloria Fonseca Alvarez, Jonathan R. Trump, Yasaman Homayouni +8

Results from a few decades of reverberation mapping (RM) studies have revealed a correlation between the radius of the broad-line emitting region (BLR) and the continuum luminosity…

astro-ph.GA2019★ 10 cited

The Impact of Wind Scalings on Stellar Growth and the Baryon Cycle in Cosmological Simulations

Shuiyao Huang, Neal Katz, Romeel Davé +5

Many phenomenologically successful cosmological galaxy formation simulations employ kinetic winds to model galactic outflows, a crucial ingredient in obtaining predictions that agr…

astro-ph.GA2019★ 14 cited

The Dragonfly Edge-on Galaxies Survey: Shaping the outer disc of NGC 4565 via accretion

Colleen Gilhuly, David Hendel, Allison Merritt +6

We present extremely deep imaging of the well-known edge-on galaxy NGC 4565 (the "Needle Galaxy"), observed as part of the Dragonfly Edge-on Galaxies Survey. Our imaging traces sta…