Gas flows in the circumgalactic medium around simulated high-redshift galaxies
Abstract We analyse the properties of circumgalactic gas around simulated galaxies in the redshift range z ≥ 3, utilizing a new sample of cosmological zoom simulations. These simulations are intended to be representative of the observed samples of Lyman α (Ly α) emitters recently obtained with the m...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2018-03, Vol.474 (4), p.4279-4301 |
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| creator | Mitchell, Peter D Blaizot, Jérémy Devriendt, Julien Kimm, Taysun Michel-Dansac, Léo Rosdahl, Joakim Slyz, Adrianne |
| description | Abstract
We analyse the properties of circumgalactic gas around simulated galaxies in the redshift range z ≥ 3, utilizing a new sample of cosmological zoom simulations. These simulations are intended to be representative of the observed samples of Lyman α (Ly α) emitters recently obtained with the multi unit spectroscopic explorer (MUSE) instrument (halo masses ∼1010–1011 M⊙). We show that supernova feedback has a significant impact on both the inflowing and outflowing circumgalactic medium (CGM) by driving outflows, reducing diffuse inflow rates, and by increasing the neutral fraction of inflowing gas. By temporally stacking simulation outputs, we find that significant net mass exchange occurs between inflowing and outflowing phases: none of the phases are mass-conserving. In particular, we find that the mass in neutral outflowing hydrogen declines exponentially with radius as gas flows outwards from the halo centre. This is likely caused by a combination of both fountain-like cycling processes and gradual photoionization/collisional ionization of outflowing gas. Our simulations do not predict the presence of fast-moving neutral outflows in the CGM. Neutral outflows instead move with modest radial velocities (∼50 km s−1), and the majority of the kinetic energy is associated with tangential rather than radial motion. |
| doi_str_mv | 10.1093/mnras/stx3017 |
| format | Article |
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We analyse the properties of circumgalactic gas around simulated galaxies in the redshift range z ≥ 3, utilizing a new sample of cosmological zoom simulations. These simulations are intended to be representative of the observed samples of Lyman α (Ly α) emitters recently obtained with the multi unit spectroscopic explorer (MUSE) instrument (halo masses ∼1010–1011 M⊙). We show that supernova feedback has a significant impact on both the inflowing and outflowing circumgalactic medium (CGM) by driving outflows, reducing diffuse inflow rates, and by increasing the neutral fraction of inflowing gas. By temporally stacking simulation outputs, we find that significant net mass exchange occurs between inflowing and outflowing phases: none of the phases are mass-conserving. In particular, we find that the mass in neutral outflowing hydrogen declines exponentially with radius as gas flows outwards from the halo centre. This is likely caused by a combination of both fountain-like cycling processes and gradual photoionization/collisional ionization of outflowing gas. Our simulations do not predict the presence of fast-moving neutral outflows in the CGM. Neutral outflows instead move with modest radial velocities (∼50 km s−1), and the majority of the kinetic energy is associated with tangential rather than radial motion.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stx3017</identifier><language>eng</language><publisher>London: Oxford University Press</publisher><subject>Astrophysics ; Emitters ; Galaxies ; Inflow ; Ionization ; Kinetic energy ; Photoionization ; Red shift ; Sciences of the Universe ; Simulation</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2018-03, Vol.474 (4), p.4279-4301</ispartof><rights>2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society 2018</rights><rights>2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c399t-24755739abf2083b717a1ee915a6e7b6b6ca9765f4508ab7bf90f41fa9526db93</citedby><cites>FETCH-LOGICAL-c399t-24755739abf2083b717a1ee915a6e7b6b6ca9765f4508ab7bf90f41fa9526db93</cites><orcidid>0000-0002-7534-8314</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,1598,27903,27904</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stx3017$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc><backlink>$$Uhttps://insu.hal.science/insu-03711234$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Mitchell, Peter D</creatorcontrib><creatorcontrib>Blaizot, Jérémy</creatorcontrib><creatorcontrib>Devriendt, Julien</creatorcontrib><creatorcontrib>Kimm, Taysun</creatorcontrib><creatorcontrib>Michel-Dansac, Léo</creatorcontrib><creatorcontrib>Rosdahl, Joakim</creatorcontrib><creatorcontrib>Slyz, Adrianne</creatorcontrib><title>Gas flows in the circumgalactic medium around simulated high-redshift galaxies</title><title>Monthly notices of the Royal Astronomical Society</title><description>Abstract
We analyse the properties of circumgalactic gas around simulated galaxies in the redshift range z ≥ 3, utilizing a new sample of cosmological zoom simulations. These simulations are intended to be representative of the observed samples of Lyman α (Ly α) emitters recently obtained with the multi unit spectroscopic explorer (MUSE) instrument (halo masses ∼1010–1011 M⊙). We show that supernova feedback has a significant impact on both the inflowing and outflowing circumgalactic medium (CGM) by driving outflows, reducing diffuse inflow rates, and by increasing the neutral fraction of inflowing gas. By temporally stacking simulation outputs, we find that significant net mass exchange occurs between inflowing and outflowing phases: none of the phases are mass-conserving. In particular, we find that the mass in neutral outflowing hydrogen declines exponentially with radius as gas flows outwards from the halo centre. This is likely caused by a combination of both fountain-like cycling processes and gradual photoionization/collisional ionization of outflowing gas. Our simulations do not predict the presence of fast-moving neutral outflows in the CGM. Neutral outflows instead move with modest radial velocities (∼50 km s−1), and the majority of the kinetic energy is associated with tangential rather than radial motion.</description><subject>Astrophysics</subject><subject>Emitters</subject><subject>Galaxies</subject><subject>Inflow</subject><subject>Ionization</subject><subject>Kinetic energy</subject><subject>Photoionization</subject><subject>Red shift</subject><subject>Sciences of the Universe</subject><subject>Simulation</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqF0D1PwzAQgGELgUQpjOyWWBBSqD8Sux6rCgpSBQvM1iWxG1f5KHYM5d-TkoqV6ZZHp7sXoWtK7ilRfNa0HsIs9HtOqDxBE8pFljAlxCmaEMKzZC4pPUcXIWwJISlnYoJeVhCwrbuvgF2L-8rgwvkiNhuooehdgRtTuthg8F1sSxxcE2voTYkrt6kSb8pQOdvjA987Ey7RmYU6mKvjnKL3x4e35VOyfl09LxfrpOBK9QlLZZZJriC3jMx5LqkEaoyiGQgjc5GLApQUmU0zModc5lYRm1ILKmOizBWfortxbwW13nnXgP_WHTj9tFhr14aoCR-eZTz9pAO-GfHOdx_RhF5vu-jb4T7NKCNi6ET4oJJRFb4LwRv7t5cSfeirf_vqY9_B346-i7t_6A8W-X0j</recordid><startdate>20180301</startdate><enddate>20180301</enddate><creator>Mitchell, Peter D</creator><creator>Blaizot, Jérémy</creator><creator>Devriendt, Julien</creator><creator>Kimm, Taysun</creator><creator>Michel-Dansac, Léo</creator><creator>Rosdahl, Joakim</creator><creator>Slyz, Adrianne</creator><general>Oxford University Press</general><general>Oxford University Press (OUP): Policy P - Oxford Open Option A</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0002-7534-8314</orcidid></search><sort><creationdate>20180301</creationdate><title>Gas flows in the circumgalactic medium around simulated high-redshift galaxies</title><author>Mitchell, Peter D ; Blaizot, Jérémy ; Devriendt, Julien ; Kimm, Taysun ; Michel-Dansac, Léo ; Rosdahl, Joakim ; Slyz, Adrianne</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c399t-24755739abf2083b717a1ee915a6e7b6b6ca9765f4508ab7bf90f41fa9526db93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Astrophysics</topic><topic>Emitters</topic><topic>Galaxies</topic><topic>Inflow</topic><topic>Ionization</topic><topic>Kinetic energy</topic><topic>Photoionization</topic><topic>Red shift</topic><topic>Sciences of the Universe</topic><topic>Simulation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mitchell, Peter D</creatorcontrib><creatorcontrib>Blaizot, Jérémy</creatorcontrib><creatorcontrib>Devriendt, Julien</creatorcontrib><creatorcontrib>Kimm, Taysun</creatorcontrib><creatorcontrib>Michel-Dansac, Léo</creatorcontrib><creatorcontrib>Rosdahl, Joakim</creatorcontrib><creatorcontrib>Slyz, Adrianne</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Mitchell, Peter D</au><au>Blaizot, Jérémy</au><au>Devriendt, Julien</au><au>Kimm, Taysun</au><au>Michel-Dansac, Léo</au><au>Rosdahl, Joakim</au><au>Slyz, Adrianne</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Gas flows in the circumgalactic medium around simulated high-redshift galaxies</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2018-03-01</date><risdate>2018</risdate><volume>474</volume><issue>4</issue><spage>4279</spage><epage>4301</epage><pages>4279-4301</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>Abstract
We analyse the properties of circumgalactic gas around simulated galaxies in the redshift range z ≥ 3, utilizing a new sample of cosmological zoom simulations. These simulations are intended to be representative of the observed samples of Lyman α (Ly α) emitters recently obtained with the multi unit spectroscopic explorer (MUSE) instrument (halo masses ∼1010–1011 M⊙). We show that supernova feedback has a significant impact on both the inflowing and outflowing circumgalactic medium (CGM) by driving outflows, reducing diffuse inflow rates, and by increasing the neutral fraction of inflowing gas. By temporally stacking simulation outputs, we find that significant net mass exchange occurs between inflowing and outflowing phases: none of the phases are mass-conserving. In particular, we find that the mass in neutral outflowing hydrogen declines exponentially with radius as gas flows outwards from the halo centre. This is likely caused by a combination of both fountain-like cycling processes and gradual photoionization/collisional ionization of outflowing gas. Our simulations do not predict the presence of fast-moving neutral outflows in the CGM. Neutral outflows instead move with modest radial velocities (∼50 km s−1), and the majority of the kinetic energy is associated with tangential rather than radial motion.</abstract><cop>London</cop><pub>Oxford University Press</pub><doi>10.1093/mnras/stx3017</doi><tpages>23</tpages><orcidid>https://orcid.org/0000-0002-7534-8314</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Astrophysics Emitters Galaxies Inflow Ionization Kinetic energy Photoionization Red shift Sciences of the Universe Simulation |
| title | Gas flows in the circumgalactic medium around simulated high-redshift galaxies |
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