A complete census of circumgalactic Mg ii at redshift z ≲ 0.5
ABSTRACT This paper presents a survey of Mg ii absorbing gas in the vicinity of 380 random galaxies, using 156 background quasi-stellar objects (QSOs) as absorption-line probes. The sample comprises 211 isolated (73 quiescent and 138 star-forming galaxies) and 43 non-isolated galaxies with sensitive...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2021-04, Vol.502 (4), p.4743-4761 |
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| creator | Huang, Yun-Hsin Chen, Hsiao-Wen Shectman, Stephen A Johnson, Sean D Zahedy, Fakhri S Helsby, Jennifer E Gauthier, Jean-René Thompson, Ian B |
| description | ABSTRACT
This paper presents a survey of Mg ii absorbing gas in the vicinity of 380 random galaxies, using 156 background quasi-stellar objects (QSOs) as absorption-line probes. The sample comprises 211 isolated (73 quiescent and 138 star-forming galaxies) and 43 non-isolated galaxies with sensitive constraints for both Mg ii absorption and H α emission. The projected distances span a range from d = 9 to 497 kpc, redshifts of the galaxies range from z = 0.10 to 0.48, and rest-frame absolute B-band magnitudes range from MB = −16.7 to −22.8. Our analysis shows that the rest-frame equivalent width of Mg ii, Wr(2796), depends on halo radius (Rh), B-band luminosity(LB), and stellar mass (Mstar) of the host galaxies, and declines steeply with increasing d for isolated, star-forming galaxies. At the same time, Wr(2796) exhibits no clear trend for either isolated, quiescent galaxies or non-isolated galaxies. In addition, the covering fraction of Mg ii absorbing gas 〈κ〉 is high with 〈κ〉 ≳ 60 per cent at |
| doi_str_mv | 10.1093/mnras/stab360 |
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This paper presents a survey of Mg ii absorbing gas in the vicinity of 380 random galaxies, using 156 background quasi-stellar objects (QSOs) as absorption-line probes. The sample comprises 211 isolated (73 quiescent and 138 star-forming galaxies) and 43 non-isolated galaxies with sensitive constraints for both Mg ii absorption and H α emission. The projected distances span a range from d = 9 to 497 kpc, redshifts of the galaxies range from z = 0.10 to 0.48, and rest-frame absolute B-band magnitudes range from MB = −16.7 to −22.8. Our analysis shows that the rest-frame equivalent width of Mg ii, Wr(2796), depends on halo radius (Rh), B-band luminosity(LB), and stellar mass (Mstar) of the host galaxies, and declines steeply with increasing d for isolated, star-forming galaxies. At the same time, Wr(2796) exhibits no clear trend for either isolated, quiescent galaxies or non-isolated galaxies. In addition, the covering fraction of Mg ii absorbing gas 〈κ〉 is high with 〈κ〉 ≳ 60 per cent at <40 kpc for isolated galaxies and declines rapidly to 〈κ〉 ≈ 0 at d ≳ 100 kpc. Within the gaseous radius, the incidence of Mg ii gas depends sensitively on both Mstar and the specific star formation rate inferred from H α. Different from what is known for massive quiescent haloes, the observed velocity dispersion of Mg ii absorbing gas around star-forming galaxies is consistent with expectations from virial motion, which constrains individual clump mass to $m_{\rm cl} \gtrsim 10^5 \, \rm M_\odot$ and cool gas accretion rate of $\sim 0.7\!-\!2 \, \mathrm{ M}_\odot \, \rm yr^{-1}$. Finally, we find no strong azimuthal dependence of Mg ii absorption for either star-forming or quiescent galaxies. Our results demonstrate that multiple parameters affect the properties of gaseous haloes around galaxies and highlight the need of a homogeneous, absorption-blind sample for establishing a holistic description of chemically enriched gas in the circumgalactic space.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stab360</identifier><language>eng</language><publisher>Oxford University Press</publisher><ispartof>Monthly notices of the Royal Astronomical Society, 2021-04, Vol.502 (4), p.4743-4761</ispartof><rights>2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c309t-61862c9b1d90281fdf7bf52d61697a79db0e8d54a262babb82cf8e7aa6bbfc323</citedby><cites>FETCH-LOGICAL-c309t-61862c9b1d90281fdf7bf52d61697a79db0e8d54a262babb82cf8e7aa6bbfc323</cites><orcidid>0000-0001-9487-8583 ; 0000-0001-7869-2551 ; 0000-0001-8813-4182 ; 0000-0003-4955-5632</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1604,27924,27925</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stab360$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc></links><search><creatorcontrib>Huang, Yun-Hsin</creatorcontrib><creatorcontrib>Chen, Hsiao-Wen</creatorcontrib><creatorcontrib>Shectman, Stephen A</creatorcontrib><creatorcontrib>Johnson, Sean D</creatorcontrib><creatorcontrib>Zahedy, Fakhri S</creatorcontrib><creatorcontrib>Helsby, Jennifer E</creatorcontrib><creatorcontrib>Gauthier, Jean-René</creatorcontrib><creatorcontrib>Thompson, Ian B</creatorcontrib><title>A complete census of circumgalactic Mg ii at redshift z ≲ 0.5</title><title>Monthly notices of the Royal Astronomical Society</title><description>ABSTRACT
This paper presents a survey of Mg ii absorbing gas in the vicinity of 380 random galaxies, using 156 background quasi-stellar objects (QSOs) as absorption-line probes. The sample comprises 211 isolated (73 quiescent and 138 star-forming galaxies) and 43 non-isolated galaxies with sensitive constraints for both Mg ii absorption and H α emission. The projected distances span a range from d = 9 to 497 kpc, redshifts of the galaxies range from z = 0.10 to 0.48, and rest-frame absolute B-band magnitudes range from MB = −16.7 to −22.8. Our analysis shows that the rest-frame equivalent width of Mg ii, Wr(2796), depends on halo radius (Rh), B-band luminosity(LB), and stellar mass (Mstar) of the host galaxies, and declines steeply with increasing d for isolated, star-forming galaxies. At the same time, Wr(2796) exhibits no clear trend for either isolated, quiescent galaxies or non-isolated galaxies. In addition, the covering fraction of Mg ii absorbing gas 〈κ〉 is high with 〈κ〉 ≳ 60 per cent at <40 kpc for isolated galaxies and declines rapidly to 〈κ〉 ≈ 0 at d ≳ 100 kpc. Within the gaseous radius, the incidence of Mg ii gas depends sensitively on both Mstar and the specific star formation rate inferred from H α. Different from what is known for massive quiescent haloes, the observed velocity dispersion of Mg ii absorbing gas around star-forming galaxies is consistent with expectations from virial motion, which constrains individual clump mass to $m_{\rm cl} \gtrsim 10^5 \, \rm M_\odot$ and cool gas accretion rate of $\sim 0.7\!-\!2 \, \mathrm{ M}_\odot \, \rm yr^{-1}$. Finally, we find no strong azimuthal dependence of Mg ii absorption for either star-forming or quiescent galaxies. Our results demonstrate that multiple parameters affect the properties of gaseous haloes around galaxies and highlight the need of a homogeneous, absorption-blind sample for establishing a holistic description of chemically enriched gas in the circumgalactic space.</description><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFz71OwzAYhWELgUQojOweWdx-thvHHqsKKFIRC8yRf4tR0kR2MsDE2tvhknol_LQ701keHelF6JrClILis3abdJ7lQRsu4AQVlIuSMCXEKSoAeElkRek5usj5DQDmnIkCLRbYdm3f-MFj67d5zLgL2MZkx3ajG22HaPHjZv-5ixHrASfv8msMA_7A-90Xhml5ic6CbrK_Ou4EvdzdPi9XZP10_7BcrInloAYiqBTMKkOdAiZpcKEyoWROUKEqXSlnwEtXzjUTzGhjJLNB-kprYUywnPEJIodfm7qckw91n2Kr03tNof7tr__662P_j785-G7s_6Hf3wNfxA</recordid><startdate>20210401</startdate><enddate>20210401</enddate><creator>Huang, Yun-Hsin</creator><creator>Chen, Hsiao-Wen</creator><creator>Shectman, Stephen A</creator><creator>Johnson, Sean D</creator><creator>Zahedy, Fakhri S</creator><creator>Helsby, Jennifer E</creator><creator>Gauthier, Jean-René</creator><creator>Thompson, Ian B</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0001-9487-8583</orcidid><orcidid>https://orcid.org/0000-0001-7869-2551</orcidid><orcidid>https://orcid.org/0000-0001-8813-4182</orcidid><orcidid>https://orcid.org/0000-0003-4955-5632</orcidid></search><sort><creationdate>20210401</creationdate><title>A complete census of circumgalactic Mg ii at redshift z ≲ 0.5</title><author>Huang, Yun-Hsin ; Chen, Hsiao-Wen ; Shectman, Stephen A ; Johnson, Sean D ; Zahedy, Fakhri S ; Helsby, Jennifer E ; Gauthier, Jean-René ; Thompson, Ian B</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c309t-61862c9b1d90281fdf7bf52d61697a79db0e8d54a262babb82cf8e7aa6bbfc323</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huang, Yun-Hsin</creatorcontrib><creatorcontrib>Chen, Hsiao-Wen</creatorcontrib><creatorcontrib>Shectman, Stephen A</creatorcontrib><creatorcontrib>Johnson, Sean D</creatorcontrib><creatorcontrib>Zahedy, Fakhri S</creatorcontrib><creatorcontrib>Helsby, Jennifer E</creatorcontrib><creatorcontrib>Gauthier, Jean-René</creatorcontrib><creatorcontrib>Thompson, Ian B</creatorcontrib><collection>CrossRef</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Huang, Yun-Hsin</au><au>Chen, Hsiao-Wen</au><au>Shectman, Stephen A</au><au>Johnson, Sean D</au><au>Zahedy, Fakhri S</au><au>Helsby, Jennifer E</au><au>Gauthier, Jean-René</au><au>Thompson, Ian B</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A complete census of circumgalactic Mg ii at redshift z ≲ 0.5</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2021-04-01</date><risdate>2021</risdate><volume>502</volume><issue>4</issue><spage>4743</spage><epage>4761</epage><pages>4743-4761</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>ABSTRACT
This paper presents a survey of Mg ii absorbing gas in the vicinity of 380 random galaxies, using 156 background quasi-stellar objects (QSOs) as absorption-line probes. The sample comprises 211 isolated (73 quiescent and 138 star-forming galaxies) and 43 non-isolated galaxies with sensitive constraints for both Mg ii absorption and H α emission. The projected distances span a range from d = 9 to 497 kpc, redshifts of the galaxies range from z = 0.10 to 0.48, and rest-frame absolute B-band magnitudes range from MB = −16.7 to −22.8. Our analysis shows that the rest-frame equivalent width of Mg ii, Wr(2796), depends on halo radius (Rh), B-band luminosity(LB), and stellar mass (Mstar) of the host galaxies, and declines steeply with increasing d for isolated, star-forming galaxies. At the same time, Wr(2796) exhibits no clear trend for either isolated, quiescent galaxies or non-isolated galaxies. In addition, the covering fraction of Mg ii absorbing gas 〈κ〉 is high with 〈κ〉 ≳ 60 per cent at <40 kpc for isolated galaxies and declines rapidly to 〈κ〉 ≈ 0 at d ≳ 100 kpc. Within the gaseous radius, the incidence of Mg ii gas depends sensitively on both Mstar and the specific star formation rate inferred from H α. Different from what is known for massive quiescent haloes, the observed velocity dispersion of Mg ii absorbing gas around star-forming galaxies is consistent with expectations from virial motion, which constrains individual clump mass to $m_{\rm cl} \gtrsim 10^5 \, \rm M_\odot$ and cool gas accretion rate of $\sim 0.7\!-\!2 \, \mathrm{ M}_\odot \, \rm yr^{-1}$. Finally, we find no strong azimuthal dependence of Mg ii absorption for either star-forming or quiescent galaxies. Our results demonstrate that multiple parameters affect the properties of gaseous haloes around galaxies and highlight the need of a homogeneous, absorption-blind sample for establishing a holistic description of chemically enriched gas in the circumgalactic space.</abstract><pub>Oxford University Press</pub><doi>10.1093/mnras/stab360</doi><tpages>19</tpages><orcidid>https://orcid.org/0000-0001-9487-8583</orcidid><orcidid>https://orcid.org/0000-0001-7869-2551</orcidid><orcidid>https://orcid.org/0000-0001-8813-4182</orcidid><orcidid>https://orcid.org/0000-0003-4955-5632</orcidid><oa>free_for_read</oa></addata></record> |
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| title | A complete census of circumgalactic Mg ii at redshift z ≲ 0.5 |
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