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Gas Kinematics in the Multiphase Circumgalactic Medium

Published online by Cambridge University Press:  21 March 2017

Nikole M. Nielsen ,
Glenn G. Kacprzak ,
Christopher W. Churchill ,
Michael T. Murphy ,
Sowgat Muzahid ,
Jane C. Charlton  and
Jessica L. Evans
Nikole M. Nielsen
Affiliation:
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia email: [email protected]
Glenn G. Kacprzak
Affiliation:
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia email: [email protected]
Christopher W. Churchill
Affiliation:
Department of Astronomy, New Mexico State University, Las Cruces, NM 88003, USA
Michael T. Murphy
Affiliation:
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia email: [email protected]
Sowgat Muzahid
Affiliation:
Department of Astronomy & Astrophysics, The Pennsylvania State University, State College, PA 16801, USA
Jane C. Charlton
Affiliation:
Department of Astronomy & Astrophysics, The Pennsylvania State University, State College, PA 16801, USA
Jessica L. Evans
Affiliation:
Department of Astronomy, New Mexico State University, Las Cruces, NM 88003, USA
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Abstract

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We use high-resolution Keck, VLT, or Hubble Space Telescope spectra of background quasars to examine the kinematic properties of the multiphase, metal-enriched circumgalactic medium in the outskirts of galaxies at 0.08 < zgal < 1.0, focusing on the low-ionization Mgii and high-ionization Ovi doublets. The absorption kinematics of low-ionization gas in the circumgalactic medium depend strongly on the star formation activity and the location about the host galaxy, where the largest velocity dispersions are associated with blue, face-on galaxies probed along the minor axis. Conversely, high-ionization gas kinematics are independent of galaxy star formation activity and orientation.

Keywords

galaxies: halosgalaxies: evolutionquasars: absorption lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 345 - 347
Copyright
Copyright © International Astronomical Union 2017 

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