• 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

    Why Post-starburst Galaxies Are Now Quiescent

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    French_2018_ApJ_861_123.pdf
    Size:
    744.0Kb
    Format:
    PDF
    Description:
    Final Published version
    Download
    Author
    French, K. Decker cc
    Zabludoff, Ann I.
    Yoon, Ilsang
    Shirley, Yancy
    Yang, Yujin
    Smercina, Adam
    Smith, J. D.
    Narayanan, Desika cc
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2018-07-10
    Keywords
    galaxies: evolution
    galaxies: ISM
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    K. Decker French et al 2018 ApJ 861 123
    Journal
    ASTROPHYSICAL JOURNAL
    Rights
    © 2018. 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
    Post-starburst or "E + A" galaxies are rapidly transitioning from star-forming to quiescence. While the current star formation rate (SFR) of post-starbursts is already at the level of early-type galaxies, we recently discovered that many have large CO-traced molecular gas reservoirs consistent with normal star-forming galaxies. These observations raise the question of why these galaxies have such low SFRs. Here we present an ALMA search for the denser gas traced by HCN (1-0) and HCO+ (1-0) in two CO-luminous, quiescent post-starburst galaxies. Intriguingly, we fail to detect either molecule. The upper limits are consistent with the low SFRs and with earlytype galaxies. The HCN/CO luminosity ratio upper limits are low compared to star-forming and even many earlytype galaxies. This implied low dense gas mass fraction explains the low SFRs relative to the CO-traced molecular gas and suggests that the state of the gas in post-starburst galaxies is unusual, with some mechanism inhibiting its collapse to denser states. We conclude that post-starbursts galaxies are now quiescent because little dense gas is available, in contrast to the significant CO-traced lower density gas reservoirs that still remain.
    ISSN
    1538-4357
    DOI
    10.3847/1538-4357/aac8de
    Version
    Final published version
    Sponsors
    Hubble Fellowship Grant [HST-HF2-51391.001-A]; Space Telescope Science Institute; NASA [NAS5-26555, ADP-NNX10AE88G]; NSF [AST-1724864, AST-1715206]; HST [AR-13906, 15043]; National Science Foundation Graduate Research Fellowship Program [DGE 1256260]; Alfred P. Sloan Foundation; National Science Foundation; U.S. Department of Energy Office of Science; Participating Institutions
    Additional Links
    http://stacks.iop.org/0004-637X/861/i=2/a=123?key=crossref.47199d02915342f690a4e7f1932d2153
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/aac8de
    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.