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dc.contributor.authorCooper, Thomas J
dc.contributor.authorRudie, Gwen C
dc.contributor.authorChen, Hsiao-Wen
dc.contributor.authorJohnson, Sean D
dc.contributor.authorZahedy, Fakhri S
dc.contributor.authorChen, Mandy C
dc.contributor.authorBoettcher, Erin
dc.contributor.authorWalth, Gregory L
dc.contributor.authorCantalupo, Sebastiano
dc.contributor.authorCooksey, Kathy L
dc.contributor.authorFaucher-Giguère, Claude-André
dc.contributor.authorGreene, Jenny E
dc.contributor.authorLopez, Sebastian
dc.contributor.authorMulchaey, John S
dc.contributor.authorPenton, Steven V
dc.contributor.authorPetitjean, Patrick
dc.contributor.authorPutman, Mary E
dc.contributor.authorRafelski, Marc
dc.contributor.authorRauch, Michael
dc.contributor.authorSchaye, Joop
dc.contributor.authorSimcoe, Robert A
dc.date.accessioned2022-04-29T18:11:44Z
dc.date.available2022-04-29T18:11:44Z
dc.date.issued2021
dc.identifier.urihttps://hdl.handle.net/1721.1/142217
dc.description.abstract<jats:title>ABSTRACT</jats:title> <jats:p>We present a detailed study of two partial Lyman limit systems (pLLSs) of neutral hydrogen column density $N_\mathrm{H\, I}\approx (1-3)\times 10^{16}\, \mathrm{cm}^{-2}$ discovered at $z$ = 0.5 in the Cosmic Ultraviolet Baryon Survey (CUBS). Available far-ultraviolet spectra from the Hubble Space Telescope Cosmic Origins Spectrograph and optical echelle spectra from MIKE on the Magellan Telescopes enable a comprehensive ionization analysis of diffuse circumgalactic gas based on resolved kinematics and abundance ratios of atomic species spanning five different ionization stages. These data provide unambiguous evidence of kinematically aligned multiphase gas that masquerades as a single-phase structure and can only be resolved by simultaneous accounting of the full range of observed ionic species. Both systems are resolved into multiple components with inferred α-element abundance varying from [α/H] ≈−0.8 to near solar and densities spanning over two decades from log nH/cm−3 ≈ −2.2 to &amp;lt;−4.3. Available deep galaxy survey data from the CUBS program taken with VLT/MUSE, Magellan/LDSS3-C and Magellan/IMACS reveal that the $z$ = 0.47 system is located 55 kpc from a star-forming galaxy with prominent Balmer absorption of stellar mass ${{M_{\rm star}}}\approx 2\times 10^{10}\, {{M_{\odot}}}$, while the $z$ = 0.54 system resides in an overdense environment of 11 galaxies within 750 kpc in projected distance, with the most massive being a luminous red galaxy of ${{M_{\rm star}}}\approx 2\times 10^{11}\, {{M_{\odot}}}$ at 375 kpc. The study of these two pLLSs adds to an emerging picture of the complex, multiphase circumgalactic gas that varies in chemical abundances and density on small spatial scales in diverse galaxy environments. The inhomogeneous nature of metal enrichment and density revealed in observations must be taken into account in theoretical models of diffuse halo gas.</jats:p>en_US
dc.language.isoen
dc.publisherOxford University Press (OUP)en_US
dc.relation.isversionof10.1093/MNRAS/STAB2869en_US
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 Internationalen_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourcearXiven_US
dc.titleThe Cosmic Ultraviolet Baryon Survey (CUBS) – IV. The complex multiphase circumgalactic medium as revealed by partial Lyman limit systemsen_US
dc.typeArticleen_US
dc.identifier.citationCooper, Thomas J, Rudie, Gwen C, Chen, Hsiao-Wen, Johnson, Sean D, Zahedy, Fakhri S et al. 2021. "The Cosmic Ultraviolet Baryon Survey (CUBS) – IV. The complex multiphase circumgalactic medium as revealed by partial Lyman limit systems." Monthly Notices of the Royal Astronomical Society, 508 (3).
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Research
dc.relation.journalMonthly Notices of the Royal Astronomical Societyen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2022-04-29T17:38:58Z
dspace.orderedauthorsCooper, TJ; Rudie, GC; Chen, H-W; Johnson, SD; Zahedy, FS; Chen, MC; Boettcher, E; Walth, GL; Cantalupo, S; Cooksey, KL; Faucher-Giguère, C-A; Greene, JE; Lopez, S; Mulchaey, JS; Penton, SV; Petitjean, P; Putman, ME; Rafelski, M; Rauch, M; Schaye, J; Simcoe, RAen_US
dspace.date.submission2022-04-29T17:39:03Z
mit.journal.volume508en_US
mit.journal.issue3en_US
mit.licenseOPEN_ACCESS_POLICY
mit.metadata.statusAuthority Work and Publication Information Neededen_US


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