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The COS-Dwarfs Survey: The Carbon Reservoir around Sub-L* Galaxies

Research output: Contribution to journalArticle

  • Rongmon Bordoloi
  • Jason Tumlinson
  • Jessica K. Werk
  • Benjamin D. Oppenheimer
  • Molly S. Peeples
  • J. Xavier Prochaska
  • Todd M. Tripp
  • Neal Katz
  • Romeel Davé
  • Andrew J. Fox
  • Christopher Thom
  • Amanda Brady Ford
  • David H. Weinberg
  • Joseph N. Burchett
  • Juna A. Kollmeier

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Original languageEnglish
Pages (from-to)136
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 14 Nov 2014


We report new observations of circumgalactic gas from the COS-Dwarfs survey, a systematic investigation of the gaseous halos around 43 low-mass z ~ 1.2 × 106 M ⊙ out to ~110 kpc. This mass is comparable to the carbon mass in the interstellar medium and exceeds the carbon mass currently in the stars of these galaxies. The C IV absorption seen around these sub-L* galaxies can account for almost two-thirds of all Wr >= 100 mÅ C IV absorption detected at low z. Comparing the C IV covering fraction with hydrodynamical simulations, we find that an energy-driven wind model is consistent with the observations whereas a wind model of constant velocity fails to reproduce the CGM or the galaxy properties. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with program GO12248.

    Research areas

  • galaxies: evolution, galaxies: general, galaxies: halos, intergalactic medium, quasars: absorption lines

ID: 57685369