• 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 HUBBLE SPACE TELESCOPE STUDY OF THE ENIGMATIC MILKY WAY HALO GLOBULAR CLUSTER CRATER

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    apj_822_1_32.pdf
    Size:
    1.892Mb
    Format:
    PDF
    Description:
    Final Published Version
    Download
    Author
    Weisz, Daniel R. cc
    Koposov, Sergey E. cc
    Dolphin, Andrew E. cc
    Belokurov, Vasily
    Gieles, Mark
    Mateo, Mario L.
    Olszewski, Edward W.
    Sills, Alison cc
    Walker, Matthew G. cc
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2016-05-02
    Keywords
    Galaxy: halo
    globular clusters: general
    Hertzsprung-Russell and C-M diagrams
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    A HUBBLE SPACE TELESCOPE STUDY OF THE ENIGMATIC MILKY WAY HALO GLOBULAR CLUSTER CRATER 2016, 822 (1):32 The Astrophysical Journal
    Journal
    The Astrophysical Journal
    Rights
    © 2016. 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
    We analyze the resolved stellar populations of the faint stellar system, Crater, based on deep optical imaging taken with the Advanced Camera for Surveys on the Hubble Space Telescope. Crater's color-magnitude diagram (CMD) extends similar to 4 mag below the oldest main-sequence (MS) turnoff. Structurally, we find that Crater has a half-light radius of similar to 20 pc and no evidence for tidal distortions. We model. Crater's CMD as a simple stellar population (SSP) and alternatively by solving for its full star formation history. In both cases, Crater is well. described by an SSP with an age of similar to 7.5 Gyr, a metallicity of [ M / H] similar to 1.65, a total stellar mass of M-star similar to 1e4 M-circle dot, and. a luminosity of M-V similar to - 5.3, located at a distance of d similar to 145 kpc, with modest uncertainties due to differences in the underlying stellar evolution models. We argue that the sparse sampling of stars above the turnoff and subgiant branch are likely to be 1.0-1.4 M-circle dot blue stragglers and their evolved descendants, as opposed to intermediate- age MS stars. We find that. Crater is an unusually young cluster given its location in the Galaxy's outer halo. We discuss scenarios for Crater's origin, including the possibility of being stripped from the SMC or the accretion from lower- mass dwarfs such as Leo I or Carina. Despite uncertainty over its progenitor system, Crater appears to have been incorporated into the Galaxy more recently than z similar to 1 (8 Gyr ago), providing an important new constraint on the accretion history of the Galaxy.
    ISSN
    1538-4357
    DOI
    10.3847/0004-637X/822/1/32
    Version
    Final published version
    Sponsors
    NASA through Hubble Fellowship - Space Telescope Science Institute [HST-HF-51331.01]; National Science Foundation [AST-1313045, AST-1412999]; NSF [AST-0807498, AST-1313006, AST-0808043, AST-1312997]; European Research Council [ERC-StG-335936]; Royal Society; NASA from the Space Telescope Science Institute [HST-GO-13746.001-A]; NASA [NAS 5-26555]; European Research Council under the European Union's Seventh Framework Program (FP) ERC [308024]; [13746]
    Additional Links
    http://stacks.iop.org/0004-637X/822/i=1/a=32?key=crossref.2a9043dfb4531be923f063472849a9d3
    ae974a485f413a2113503eed53cd6c53
    10.3847/0004-637X/822/1/32
    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.