Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

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

    Ultraluminous star-forming galaxies and extremely luminous warm molecular hydrogen emission at z = 2.16 in the PKS1138-26 radio galaxy protocluster

    Access Status
    Fulltext not available
    Authors
    Ogle, P.
    Davies, J.
    Appleton, P.
    Bertincourt, B.
    Seymour, Nick
    Helou, G.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Ogle, P. and Davies, J. and Appleton, P. and Bertincourt, B. and Seymour, N. and Helou, G. 2012. Ultraluminous star-forming galaxies and extremely luminous warm molecular hydrogen emission at z = 2.16 in the PKS1138-26 radio galaxy protocluster. Astrophysical Journal. 751 (1).
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/751/1/13
    ISSN
    0004-637X
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/37555
    Collection
    • Curtin Research Publications
    Abstract

    A deep Spitzer Infrared Spectrograph map of the PKS 1138–26 galaxy protocluster reveals ultraluminous polycyclic aromatic hydrocarbon (PAH) emission from obscured star formation in three protocluster galaxies, including Hα-emitter (HAE) 229, HAE 131, and the central Spiderweb Galaxy. Star formation rates of ~500-1100 M ☉ yr–1 are estimated from the 7.7 μm PAH feature. At such prodigious formation rates, the galaxy stellar masses will double in 0.6-1.1 Gyr. We are viewing the peak epoch of star formation for these protocluster galaxies. However, it appears that extinction of Hα is much greater (up to a factor of 40) in the two ULIRG HAEs compared to the Spiderweb. This may be attributed to different spatial distributions of star formation-nuclear star formation in the HAEs versus extended star formation in accreting satellite galaxies in the Spiderweb. We find extremely luminous mid-IR rotational line emission from warm molecular hydrogen in the Spiderweb Galaxy, with L(H2 0-0 S(3)) = 1.4 × 1044 erg s–1 (3.7 × 1010 L ☉), ~20 times more luminous than any previously known H2 emission galaxy (MOHEG). Depending on the temperature, this corresponds to a very large mass of >9 × 106-2 × 109 M ☉ of T > 300 K molecular gas, which may be heated by the PKS 1138–26 radio jet, acting to quench nuclear star formation. There is >8 times more warm H2 at these temperatures in the Spiderweb than what has been seen in low-redshift (z < 0.2) radio galaxies, indicating that the Spiderweb may have a larger reservoir of molecular gas than more evolved radio galaxies. This is the highest redshift galaxy yet in which warm molecular hydrogen has been directly detected.

    Related items

    Showing items related by title, author, creator and subject.

    • CO(1-0) detection of molecular gas in the massive Spiderweb Galaxy (z = 2)
      Emonts, B.; Feain, I.; Röttgering, H.; Miley, G.; Seymour, Nick; Norris, R.; Carilli, C.; Villar-Martín, M.; Mao, M.; Sadler, E.; Ekers, R.; van Moorsel, G.; Ivison, R.; Pentericci, L.; Tadhunter, C.; Saikia, D. (2013)
      The high-redshift radio galaxy MRC 1138−262 (‘Spiderweb Galaxy’; z = 2.16) is one of the most massive systems in the early Universe and surrounded by a dense ‘web’ of proto-cluster galaxies. Using the Australia Telescope ...
    • The implications of the surprising existence of a large, massive CO disk in a distant protocluster
      Dannerbauer, H.; Lehnert, M.; Emonts, B.; Ziegler, B.; Altieri, B.; De Breuck, C.; Hatch, N.; Kodama, T.; Koyama, Y.; Kurk, J.; Matiz, T.; Miley, G.; Narayanan, D.; Norris, R.; Overzier, R.; Röttgering, H.; Sargent, M.; Seymour, Nick; Tanaka, M.; Valtchanov, I.; Wylezalek, D. (2017)
      It is not yet known if the properties of molecular gas in distant protocluster galaxies are significantly affected by their environment as galaxies are in local clusters. Through a deep, 64 h of effective on-source ...
    • ALMA finds dew drops in the dusty spider's web
      Gullberg, B.; Lehnert, M.; de Breuck, C.; Branchu, S.; Dannerbauer, H.; Drouart, G.; Emonts, B.; Guillard, P.; Hatch, N.; Nesvadba, N.; Omont, A.; Seymour, Nick; Vernet, J. (2016)
      We present 0.5 resolution ALMA detections of the observed 246 GHz continuum, [CI] 3P2→3P1 fine structure line ([CI]2–1), CO(7–6), and H2O lines in the z = 2.161 radio galaxy MRC1138-262, the so-called Spiderweb galaxy. ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.