2013
DOI: 10.1088/0004-637x/777/1/59
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The Cos-Halos Survey: Rationale, Design, and a Census of Circumgalactic Neutral Hydrogen

Abstract: 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 Cosmic Origins Spectrograph aboard the Hubble Space Telescope. This survey has yielded 39 spectra of z em 0.5 QSOs with S/N ∼10-15 per resolution element. The QSO sightlines pass within 150 physical kpc of the galaxies, which span early and late types over stellar mass log M * /M = 9.5 − 11.5. We find that the CGM exhibits strong H I, … Show more

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Cited by 363 publications
(627 citation statements)
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References 85 publications
(140 reference statements)
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“…However, the variation in CGM properties during this time is expected to be minimal (Chen 2012). Also, the COS-Halos sample was selected to be all centrals (with a couple of non-centrals Tumlinson et al 2013, Section 2.5). This is not one of the criteria for COS-GASS, although the mass range of the galaxies ensured that most of the COS-GASS galaxies (34/45) are centrals (based on the group catalog by Yang et al 2005Yang et al , 2007.…”
Section: Samplementioning
confidence: 99%
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“…However, the variation in CGM properties during this time is expected to be minimal (Chen 2012). Also, the COS-Halos sample was selected to be all centrals (with a couple of non-centrals Tumlinson et al 2013, Section 2.5). This is not one of the criteria for COS-GASS, although the mass range of the galaxies ensured that most of the COS-GASS galaxies (34/45) are centrals (based on the group catalog by Yang et al 2005Yang et al , 2007.…”
Section: Samplementioning
confidence: 99%
“…For more information on the properties of the target galaxies, including their redshifts, stellar masses, SFRs 13 , sSFR, galaxy colors, and impact parameter of the sightlines, we refer the reader to Table 1 presented in this paper (for the COS-GASS sample) and Table 2 from the published work by Tumlinson et al (2013).…”
Section: Samplementioning
confidence: 99%
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“…In a systematic search for such systems, Tumlinson et al (2013) find absorption in all starforming galaxies, with a detection rate as large as 75 % for the early types and 100% for late types. The sample contains all Hubble types in the near universe (z < 0.35) with intermediate masses 9.5 ≤ log(M /M ) ≤ 11.5, and the lines-of-sight sample impact parameters d < 150 kpc.…”
Section: Neutral Gas Observationsmentioning
confidence: 99%