• Login
    View Item 
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    A Sub-damped Ly alpha Absorber with Unusual Abundances: Evidence of Gas Recycling in a Low-redshift Galaxy Group

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Frye_2019_ApJ_872_129.pdf
    Size:
    1.400Mb
    Format:
    PDF
    Description:
    Final Published version
    Download
    Author
    Frye, Brenda L.
    Bowen, David V. cc
    Tripp, Todd M. cc
    Jenkins, Edward B. cc
    Pettini, Max
    Ellison, Sara L. cc
    Affiliation
    Univ Arizona, Steward Observ, Dept Astron
    Issue Date
    2019-02-20
    Keywords
    galaxies: halos
    intergalactic medium
    quasars: absorption lines
    quasars: individual (PG 1543+489)
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Brenda L. Frye et al 2019 ApJ 872 129
    Journal
    ASTROPHYSICAL JOURNAL
    Rights
    © 2019. The American Astronomical Society. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Using Hubble Space Telescope/Space Telescope Imaging Spectrograph G140M spectroscopy, we investigate an absorption-line system at z = 0.07489 in the spectrum of the quasi-stellar object PG 1543+489 (z(QSO) = 0.401). The sightline passes within rho = 66 kpc of an edge-on 2L* disk galaxy at a similar redshift, but the galaxy belongs to a group with four other galaxies within rho = 160 kpc. We detect H I [log N(H I/cm(-2)) = 19.12 +/- 0.04] as well as N I, Mg II, Si II, and Si III, from which we measure a gas-phase abundance of [N/H] = -1.0 +/- 0.1. Photoionization models indicate that the nitrogen-to-silicon relative abundance is solar, yet magnesium is underabundant by a factor of approximate to 2. We also report spatially resolved emission-line spectroscopy of the nearby galaxy, and we extract its rotation curve. The galaxy's metallicity is approximate to 8x higher than [N/H] in the absorber, and interestingly, the absorber velocities suggest that the gas at rho = 66 kpc is corotating with the galaxy's stellar disk, possibly with an inflow component. These characteristics could indicate that this sub-damped Ly alpha absorber system arises in a "cold-accretion" flow. However, the absorber abundance patterns are peculiar. We hypothesize that the gas was ejected from its galaxy of origin (or perhaps is a result of tidal debris from interactions between the group galaxies) with a solar nitrogen abundance, but that subsequently mixed with (and was diluted by) gas in the circumgalactic medium or group. If the gas is bound to the nearby galaxy, this system may be an example of the gas "recycling" predicted by theoretical galaxy simulations. Our hypothesis is testable with future observations.
    ISSN
    1538-4357
    DOI
    10.3847/1538-4357/ab0083
    Version
    Final published version
    Sponsors
    Universite de Paris-Sud, Institute d'Astrophysique Spatial d'Orsay in 2016; Institute for Advanced Study in Princeton; Space Telescope Science Institute (STScI) [GO-08625.01]; NASA [NAS5-26555]
    Additional Links
    http://stacks.iop.org/0004-637X/872/i=2/a=129?key=crossref.1351005b04abfba9891855113d576080
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/ab0083
    Scopus Count
    Collections
    UA Faculty Publications

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.