HST observations reveal the curious geometry of circumgalactic gas

Glenn G. Kacprzak; Sowgat Muzahid; Christopher W. Churchill; Nikole M. Nielsen; Jane C. Charlton

doi:10.1017/S1743921316008905

HST observations reveal the curious geometry of circumgalactic gas

Glenn G. Kacprzak, Sowgat Muzahid, Christopher W. Churchill, Nikole M. Nielsen, Jane C. Charlton

Astronomy & Astrophysics

Research output: Contribution to journal › Article › peer-review

Abstract

We have discovered that warm gas flows along galaxy major and minor axes detected out to 200 kpc. Our results are derived from a sample of HST-imaged isolated galaxies with nearby background quasars used to probe their 10⁵K CGM detected in HST/COS UV spectra (traced by Ovi absorption). We constrain the geometry of the gas to reside between 20-40 degrees of the projected major axis and within 60 degrees of the projected minor axis, with little-to-no gas found in between. Furthermore, strong absorption systems tend to be found along the minor axes of star-forming galaxies. All of our results are consistent with the current view of the CGM originating from major axis-fed inflows/recycled gas and from minor axis-driven outflows.

Original language	English (US)
Pages (from-to)	342-344
Number of pages	3
Journal	Proceedings of the International Astronomical Union
Volume	11
Issue number	S321
DOIs	https://doi.org/10.1017/S1743921316008905
State	Published - Mar 1 2016

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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title = "HST observations reveal the curious geometry of circumgalactic gas",

abstract = "We have discovered that warm gas flows along galaxy major and minor axes detected out to 200 kpc. Our results are derived from a sample of HST-imaged isolated galaxies with nearby background quasars used to probe their 105K CGM detected in HST/COS UV spectra (traced by Ovi absorption). We constrain the geometry of the gas to reside between 20-40 degrees of the projected major axis and within 60 degrees of the projected minor axis, with little-to-no gas found in between. Furthermore, strong absorption systems tend to be found along the minor axes of star-forming galaxies. All of our results are consistent with the current view of the CGM originating from major axis-fed inflows/recycled gas and from minor axis-driven outflows.",

author = "Kacprzak, {Glenn G.} and Sowgat Muzahid and Churchill, {Christopher W.} and Nielsen, {Nikole M.} and Charlton, {Jane C.}",

note = "Publisher Copyright: {\textcopyright} 2017 International Astronomical Union.",

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doi = "10.1017/S1743921316008905",

language = "English (US)",

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TY - JOUR

T1 - HST observations reveal the curious geometry of circumgalactic gas

AU - Kacprzak, Glenn G.

AU - Muzahid, Sowgat

AU - Churchill, Christopher W.

AU - Nielsen, Nikole M.

AU - Charlton, Jane C.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - We have discovered that warm gas flows along galaxy major and minor axes detected out to 200 kpc. Our results are derived from a sample of HST-imaged isolated galaxies with nearby background quasars used to probe their 105K CGM detected in HST/COS UV spectra (traced by Ovi absorption). We constrain the geometry of the gas to reside between 20-40 degrees of the projected major axis and within 60 degrees of the projected minor axis, with little-to-no gas found in between. Furthermore, strong absorption systems tend to be found along the minor axes of star-forming galaxies. All of our results are consistent with the current view of the CGM originating from major axis-fed inflows/recycled gas and from minor axis-driven outflows.

AB - We have discovered that warm gas flows along galaxy major and minor axes detected out to 200 kpc. Our results are derived from a sample of HST-imaged isolated galaxies with nearby background quasars used to probe their 105K CGM detected in HST/COS UV spectra (traced by Ovi absorption). We constrain the geometry of the gas to reside between 20-40 degrees of the projected major axis and within 60 degrees of the projected minor axis, with little-to-no gas found in between. Furthermore, strong absorption systems tend to be found along the minor axes of star-forming galaxies. All of our results are consistent with the current view of the CGM originating from major axis-fed inflows/recycled gas and from minor axis-driven outflows.

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JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

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HST observations reveal the curious geometry of circumgalactic gas

Abstract

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