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Pinpointing the cosmic web between massive galaxy clusters I. The incidence of HI and OVI as WHIM tracers
Karen Martínez-Acosta, Nicolas Tejos, Ismael Pessa +6
At redshift z<1, the CDM paradigm predicts that 40-50\% of baryons reside in the warm-hot intergalactic medium (WHIM) within cosmic web filaments. Characterizing the physi…
SDSS DR17: The Cosmic Slime Value Added Catalog
Matthew C. Wilde, Oskar Elek, Joseph N. Burchett +5
The "cosmic web", the filamentary large-scale structure in a cold dark matter Universe, is readily apparent via galaxy tracers in spectroscopic surveys. However, the underlying dar…
Voyage through the Hidden Physics of the Cosmic Web
A. Simionescu, S. Ettori, N. Werner +27
The majority of the ordinary matter in the local Universe has been heated by strong structure formation shocks and resides in a largely unexplored hot, diffuse, X-ray emitting plas…
Probing Feedback in Galaxy Formation with Millimeter-wave Observations
Nicholas Battaglia, J. Colin Hill, Stefania Amodeo +14
Achieving a precise understanding of galaxy formation in a cosmological context is one of the great challenges in theoretical astrophysics, due to the vast range of spatial scales…
The Sources of Extreme Ultraviolet and Soft X-ray Backgrounds
Phoebe R. Upton Sanderbeck, Matthew McQuinn, Anson D'Aloisio +1
Radiation in the extreme ultraviolet (EUV) and soft X-ray holds clues to the location of the missing baryons, the energetics in stellar feedback processes, and the cosmic enrichmen…
Towards the statistical detection of the warm-hot intergalactic medium in inter-cluster filaments of the cosmic web
Nicolas Tejos, J. Xavier Prochaska, Neil H. M. Crighton +6
Modern analyses of structure formation predict a universe tangled in a 'cosmic web' of dark matter and diffuse baryons. These theories further predict that at low-z, a significant…
The COS-Halos Survey: Physical Conditions and Baryonic Mass in the Low-Redshift Circumgalactic Medium
Jessica K. Werk, J. Xavier Prochaska, Jason Tumlinson +13
We analyze the physical conditions of the cool, photoionized (T K) circumgalactic medium (CGM) using the COS-Halos suite of gas column density measurements for 44 gaseo…
The High-Ion Content and Kinematics of Low-Redshift Lyman Limit Systems
Andrew J. Fox, Nicolas Lehner, Jason Tumlinson +9
We study the high-ionization phase and kinematics of the circumgalactic medium around low-redshift galaxies using a sample of 23 Lyman Limit Systems (LLSs) at 0.08<z<0.93 observed…
A Budget and Accounting of Metals at z~0: Results from the COS-Halos Survey
Molly S. Peeples, Jessica K. Werk, Jason Tumlinson +4
We present a budget and accounting of metals in and around star-forming galaxies at . We combine empirically derived star formation histories with updated supernova and AG…
The COS-Halos Survey: Rationale, Design, and A Census of Circumgalactic Neutral Hydrogen
Jason Tumlinson, Christopher Thom, Jessica Werk +11
We present the design and methods of the COS-Halos survey, a systematic investigation of the gaseous halos of 44 z = 0.15-0.35 galaxies using background QSOs observed with the Cosm…
Gemini Spectroscopy of the Short GRB 130603B Afterglow and Host
A. Cucchiara, J. X. Prochaska, D. A. Perley +5
We present early optical photometry and spectroscopy of the afterglow and host galaxy of the bright short-duration gamma-ray burst GRB 130603B discovered by the Swift satellite. Us…
Choirs, HI Galaxy Groups: Catalogue and Detection of Star-forming Dwarf Group Members
Sarah M. Sweet, Gerhardt Meurer, Michael J. Drinkwater +24
Hα observations centred on galaxies selected from the HI Parkes All Sky Survey (HIPASS, Barnes et al. 2001) typically show one and sometimes two star-forming galaxies within the ap…
The Bimodal Metallicity Distribution of the Cool Circumgalactic Medium at z<1
N. Lehner, J. C. Howk, T. M. Tripp +7
We assess the metal content of the cool (10^4 K) circumgalactic medium (CGM) about galaxies at z<1 using an H I-selected sample of 28 Lyman limit systems (LLS, defined here as abso…
The COS-Halos Survey: An Empirical Description of the Metal-Line Absorption in the Low-Redshift Circumgalactic Medium
Jessica Werk, J. Xavier Prochaska, Christopher Thom +4
We present the equivalent width and column density measurements for low and intermediate ionization states of the circumgalactic medium (CGM) surrounding 44 low-z, L ~ L* galaxies…
Not Dead Yet: Cool Circumgalactic Gas in the Halos of Early Type Galaxies
Christopher Thom, Jason Tumlinson, Jessica K. Werk +10
We report new observations of circumgalactic gas in the halos of early type galaxies obtained by the COS-Halos Survey with the Cosmic Origins Spectrograph onboard the Hubble Space…
QSO Absorption Systems Detected in Ne VIII: High-Metallicity Clouds with a Large Effective Cross Section
Joseph D. Meiring, Todd M. Tripp, Jessica K. Werk +5
Using high resolution, high signal-to-noise ultraviolet spectra of the z = 0.9754 quasar PG1148+549 obtained with the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescop…
The First Observations of Low-Redshift Damped Lyman-α Systems with the Cosmic Origins Spectrograph: Chemical Abundances and Affiliated Galaxies
A. J. Battisti, J. D. Meiring, T. M. Tripp +6
We present Cosmic Origins Spectrograph (COS) measurements of metal abundances in eight 0.083<z<0.321 damped Lyman-α(DLA) and sub-damped Ly-α absorption systems serendipitously disc…
The Hidden Mass and Large Spatial Extent of a Poststarburst Galaxy Outflow
Todd M. Tripp, Joseph D. Meiring, J. Xavier Prochaska +9
Outflowing winds of multiphase plasma have been proposed to regulate the buildup of galaxies, but key aspects of these outflows have not been probed with observations. Using ultrav…
The Large, Oxygen-Rich Halos of Star-Forming Galaxies Are A Major Reservoir of Galactic Metals
Jason Tumlinson, Christopher Thom, Jessica K. Werk +11
The circumgalactic medium (CGM) is fed by galaxy outflows and accretion of intergalactic gas, but its mass, heavy element enrichment, and relation to galaxy properties are poorly c…
The COS-Halos Survey: Keck LRIS and Magellan MagE Optical Spectroscopy
Jessica K. Werk, J. Xavier Prochaska, Christopher Thom +4
We present high signal-to-noise optical spectra for 67 low-redshift (0.1 < z < 0.4) galaxies that lie within close projected distances (5 kpc < rho < 150 kpc) of 38 background UV-b…
A Gaseous Group with Unusual Remote Star Formation
Nitza Santiago-Figueroa, Mary E. Putman, Jessica Werk +2
We present VLA 21-cm observations of the spiral galaxy ESO 481-G017 to determine the nature of remote star formation traced by an HII region found 43 kpc and ~800 km s^-1 from the…
The Gas-Galaxy Connection at z = 0.35: OVI and HI Absorption Towards J0943+0531
C. Thom, J. K. Werk, J. Tumlinson +4
We present observations of HI and OVI absorption systems proximate to a galaxy at z_gal = 0.3529. The absorption was detected serendipitously in Cosmic Origins Spectrograph observa…
Evidence for Cold Accretion: Primitive Gas Flowing onto a Galaxy at z~0.274
Joseph Ribaudo, Nicolas Lehner, J. Christopher Howk +5
We present UV and optical observations from the Cosmic Origins Spectrograph on the Hubble Space Telescope and Keck of a z= 0.27395 Lyman limit system (LLS) seen in absorption again…
Metal Transport to the Gaseous Outskirts of Galaxies
Jessica Werk, Mary Putman, Gerhardt Meurer +1
We present a search for outlying HII regions in the extended gaseous outskirts of nearby (D < 40 Mpc) galaxies, and subsequent multi-slit spectroscopy used to obtain the HII region…