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Damped Ly-alpha Absorbers in Star-forming Galaxies at z < 0.15 Detected with the Hubble Space Telescope and Implications for Galaxy Evolution
Varsha P. Kulkarni, David V. Bowen, Lorrie A. Straka +4
We report {\it HST} COS spectroscopy of 10 quasars with foreground star-forming galaxies at 0.02 0.14 within impact parameters of 1-7 kpc. We detect damped/sub-dampe…
The Geometry of Cold, Metal-Enriched Gas Around Galaxies at
Britt F. Lundgren, Samantha Creech, Gabriel Brammer +10
We present the first results from a Hubble Space Telescope WFC3/IR program, which obtained direct imaging and grism observations of galaxies near quasar sightlines with a high freq…
Absorption-line Environments of High-redshift BOSS Quasars
Chen Chen, Fred Hamann, Bo Ma +4
The early stage of massive galaxy evolution often involves outflows driven by a starburst or a central quasar plus cold mode accretion (infall), which adds to the mass build-up in…
HD 62542: Probing the Bare, Dense Core of a Translucent Interstellar Cloud
Daniel E. Welty, Paule Sonnentrucker, Theodore P. Snow +1
We discuss the interstellar absorption from many atomic and molecular species seen in high-resolution /STIS UV and high-S/N optical spectra of the moderately reddened B3-5~V s…
Absorption line abundances in the SMC-like galaxy UGC 5282: evidence for ISM dilution from inflows on kiloparsec scales
David V. Bowen, Todd M. Tripp, Edward B. Jenkins +4
We present an HST Cosmic Origins Spectrograph (COS) spectrum of the QSO SDSS J095109.12+330745.8 () whose sightline passes through the SMC-like dwarf galaxy UGC 528…
MUSE-ALMA Halos V: Physical properties and environment of z < 1.4 HI quasar absorbers
A. Hamanowicz, C. Peroux, M. A. Zwaan +11
We present results of the MUSE-ALMA Halos, an ongoing study of the Circum-Galactic Medium (CGM) of low redshift galaxies (z < 1.4), currently comprising 14 strong HI absorbers in f…
The Apache Point Observatory Catalog of Optical Diffuse Interstellar Bands
Haoyu Fan, L. M. Hobbs, Julie A. Dahlstrom +7
Aiming for a new and more comprehensive DIB catalog between 4,000 and 9,000Å, we revisited the Atlas Catalog based on the observations of HD 183143 and HD 204827 (Hobbs et al. 2008…
Multi-phase Circum-Galactic Medium probed with MUSE and ALMA
Celine Peroux, Martin Zwaan, Anne Klitsch +9
Galaxy halos appear to be missing a large fraction of their baryons, most probably hiding in the circumgalactic medium (CGM), a diffuse component within the dark matter halo that e…
A Lyman limit system associated with galactic winds
Hadi Rahmani, Celine Peroux, Ilane Schroetter +9
Projected quasar galaxy pairs provide powerful means to study the circumgalactic medium (CGM) that maintains the relics of galactic feedback and the accreted gas from the intergala…
Characterising the Circum-Galactic Medium of Damped Lyman- Absorbing Galaxies
Ramona Augustin, Celine Peroux, Palle Moller +8
Gas flows in and out of galaxies through their circumgalactic medium (CGM) are poorly constrained and direct observations of this faint, diffuse medium remain challenging. We use a…
Modelling the UV spectrum of SDSS-III/BOSS galaxies: hints towards the detection of the UV upturn at high-z
Claire Le Cras, Claudia Maraston, Daniel Thomas +1
We exploit stellar population models of absorption line indices in the ultraviolet (from 2000 - 3200 Angstrom) to study the spectra of massive galaxies. Our central aim is to inves…
Observational signatures of a warped disk associated with cold-flow accretion
Hadi Rahmani, Céline Péroux, Ramona Augustin +9
We present MUSE observations of the field of the quasar Q0152020 whose spectrum shows a Lyman limit system (LLS) at redshift , with a metallicity Z $\gtrsim…
The Behavior of Selected Diffuse Interstellar Bands with Molecular Fraction in Diffuse Atomic and Molecular Clouds
Haoyu Fan, Daniel E. Welty, Donald G. York +10
We study the behavior of eight diffuse interstellar bands (DIBs) in different interstellar environments, as characterized by the fraction of hydrogen in molecular form [(H)]…
Quasars with PV broad absorption in BOSS data release 9
Daniel M. Capellupo, Fred Hamann, Hanna Herbst +7
Broad absorption lines (BALs) found in a significant fraction of quasar spectra identify high-velocity outflows that might be present in all quasars and could be a major factor in…
The Mean Metal-line Absorption Spectrum of DLAs in BOSS
Lluís Mas-Ribas, Jordi Miralda-Escudé, Ignasi Pérez-Ràfols +6
We study the mean absorption spectrum of the Damped Lyman alpha population at by stacking normalized, rest-frame shifted spectra of DLAs from the DR12 of…
Nature of the Absorbing Gas associated with a Galaxy Group at z~0.4
Celine Peroux, Hadi Rahmani, Samuel Quiret +6
We present new MUSE observations of quasar field Q2131-1207 with a log N(HI)=19.50+/-0.15 sub-DLA at z_abs=0.42980. We detect four galaxies at a redshift consistent with that of th…
The Structure of the Circumgalactic Medium of Galaxies: Cool Accretion Inflow Around NGC 1097
D. V. Bowen, D. Chelouche, E. B. Jenkins +4
We present Hubble Space Telescope far-UV spectra of 4 QSOs whose sightlines pass through the halo of NGC 1097 at impact parameters of 48 -165 kpc. NGC 1097 is a nearby spiral galax…
Probing the Interstellar Dust in Galaxies over > 10 Gyr of Cosmic History
Varsha P. Kulkarni, Monique C. Aller, Donald G. York +3
This article is based on an invited talk given by V. P. Kulkarni at the 8th Cosmic Dust meeting. Dust has a profound effect on the physics and chemistry of the interstellar gas in…
Thermal Pressures in the Interstellar Medium of the Magellanic Clouds
Daniel E. Welty, James T. Lauroesch, Tony Wong +1
We discuss the thermal pressures () in predominantly cold, neutral interstellar gas in the Magellanic Clouds, derived from analyses of the fine-structure excitation of neutr…
The Time-Domain Spectroscopic Survey: Understanding the Optically Variable Sky with SEQUELS in SDSS-III
John J. Ruan, Scott F. Anderson, Paul J. Green +27
The Time-Domain Spectroscopic Survey (TDSS) is an SDSS-IV eBOSS subproject primarily aimed at obtaining identification spectra of ~220,000 optically-variable objects systematically…
A SINFONI Integral Field Spectroscopy Survey for Galaxy Counterparts to Damped Lyman-alpha Systems - VI. Metallicity and Geometry as Gas Flow Probes
Celine Peroux, Samuel Quiret, Hadi Rahmani +7
The use of background quasars provides a powerful tool to probe the cool gas in the circum-galactic medium of foreground galaxies. Here, we present new observations with SINFONI an…
Keck and VLT Observations of Super-damped Lyman-alpha Absorbers at z=2=2.5: Constraints on Chemical Compositions and Physical Conditions
Varsha P. Kulkarni, Debopam Som, Sean Morrison +3
We report Keck/ESI and VLT/UVES observations of three super-damped Lyman-alpha quasar absorbers with H I column densities log N(HI) >= 21.7 at redshifts z=2-2.5. All three absorber…
The SDSS-III BOSS quasar lens survey: discovery of thirteen gravitationally lensed quasars
Anupreeta More, Masamune Oguri, Issha Kayo +15
We report the discovery of 13 confirmed two-image quasar lenses from a systematic search for gravitationally lensed quasars in the SDSS-III Baryon Oscillation Spectroscopic Survey…
Magellan LDSS3 emission confirmation of galaxies hosting metal-rich Lyman-alpha absorption systems
Lorrie A. Straka, Sean D. Johnson, Donald G. York +5
Using the Low Dispersion Survey Spectrograph 3 at the Magellan II Clay Telescope, we target {candidate absorption host galaxies} detected in deep optical imaging {(reaching limitin…