• Login
    View Item 
    •   UCrea
    • UCrea Investigación
    • Instituto de Física de Cantabria (IFCA) - centro mixto UC-CSIC
    • D52 Artículos
    • View Item
    •   UCrea
    • UCrea Investigación
    • Instituto de Física de Cantabria (IFCA) - centro mixto UC-CSIC
    • D52 Artículos
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    An excess of star-forming galaxies in the fields of high-redshift QSOs

    View/Open
    An excess of star-forming ... (2.073Mb)
    Identificadores
    URI: http://hdl.handle.net/10902/3975
    DOI: 10.1111/j.1365-2966.2010.16641.x
    ISSN: 0035-8711
    ISSN: 1365-2966
    Compartir
    RefworksMendeleyBibtexBase
    Estadísticas
    View Usage Statistics
    Google Scholar
    Full record
    Show full item record
    Author
    Stevens, Jason A.; Jarvis, Matt J.; Coppin, Kristen E. K.; Page, Mathew J.; Greve, Thomas R.; Carrera Troyano, Francisco JesúsAutoridad Unican; Ivison, Rob J.
    Date
    2010-07
    Derechos
    © 2010 The Royal Astronomical Society
    Publicado en
    Monthly Notices of the Royal Astronomical Society, vol. 405, iss. 4, pag. 2623–2638 (2010)
    Publisher
    The Royal Astronomical Society
    Enlace a la publicación
    http://dx.doi.org/10.1111/j.1365-2966.2010.16641.x
    Palabras clave
    Galaxies: evolution
    Galaxies: formation
    Galaxies: starburst
    Galaxies: high-redshift
    Submillimetre: galaxies
    Abstract:
    We present submillimetre (submm) and mid-infrared (MIR) imaging observations of five fields centred on quasi-stellar objects (QSOs) at 1.7< z<2.8. All five QSOs were detected previously at submm wavelengths. At 850 (450) µm, we detect 17 (11) submillimetre galaxies (SMGs) in addition to the QSOs. The total area mapped at 850 µm is ~28 arcmin2 down to rms noise levels of 1–2 mJy beam−1, depending on the field. Integral number counts are computed from the 850-µm data using the same analytical techniques adopted by ‘blank-field’ submm surveys. We find that the ‘QSO-field’ counts show a clear excess over the blank-field counts at deboosted flux densities of~2-4 mJy; at higher flux densities, the counts are consistent with the blank-field counts. Robust MIR counterparts are identified for all four submm detected QSOs and ~60 per cent of the SMGs. The MIR colours of the QSOs are similar to those of the local ultraluminous infrared galaxy (ULIRG)/active galactic nuclei (AGN) Mrk 231 if placed at 1< z<3 whilst most of the SMGs have colours very similar to those of the local ULIRG Arp 220 at 1< z<3. MIR diagnostics therefore find no strong evidence that the SMGs host buried AGN although we cannot rule out such a possibility. Taken together our results suggest that the QSOs sit in regions of the early universe which are undergoing an enhanced level of major star formation activity, and should evolve to become similarly dense regions containing massive galaxies at the present epoch. Finally, we find evidence that the level of star formation activity in individual galaxies appears to be lower around the QSOs than it is around more powerful radio-loud AGN at higher redshifts.
    Collections to which it belong
    • D52 Artículos [627]

    UNIVERSIDAD DE CANTABRIA

    Repositorio realizado por la Biblioteca Universitaria utilizando DSpace software
    Contact Us | Send Feedback
    Metadatos sujetos a:licencia de Creative Commons Reconocimiento 3.0 España
     

     

    Browse

    All of UCreaCommunities and CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    View Usage Statistics
    About UCrea
    What is UcreaGuide of self-archivingThesis archiveOpen accessCopyright guideInstitutional policy
    Thinks in open
    Piensa en abierto
    Share

    UNIVERSIDAD DE CANTABRIA

    Repositorio realizado por la Biblioteca Universitaria utilizando DSpace software
    Contact Us | Send Feedback
    Metadatos sujetos a:licencia de Creative Commons Reconocimiento 3.0 España