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Characterizing Circumgalactic Gas around Massive Ellipticals at z~0.4 - II. Physical Properties and Elemental Abundances
- Publication Year :
- 2018
-
Abstract
- We present a systematic investigation of the circumgalactic medium (CGM) within projected distances d1e11 M_sun. Combining far-ultraviolet Cosmic Origin Spectrograph spectra from the Hubble Space Telescope and optical echelle spectra from the ground enables a detailed ionization analysis based on resolved component structures of a suite of absorption transitions, including the full HI Lyman series and various ionic metal transitions. By comparing the relative abundances of different ions in individually-matched components, we show that cool gas (T~1e4 K) density and metallicity can vary by more than a factor of ten in in an LRG halo. Specifically, metal-poor absorbing components with<br />Accepted for publication in MNRAS after a minor revision. 23 pages, 14 figures, and a 29-page Appendix with 27 additional figures
- Subjects :
- Physics
010308 nuclear & particles physics
Lyman series
Metallicity
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
Radius
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
Astrophysics - Astrophysics of Galaxies
Spectral line
Galaxy
symbols.namesake
13. Climate action
Space and Planetary Science
Ionization
Astrophysics of Galaxies (astro-ph.GA)
0103 physical sciences
symbols
Astrophysics::Solar and Stellar Astrophysics
Halo
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
Einasto profile
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....1337542e16fe1498fd387f20cc1bc81f