Submillimetre observations of galaxy clusters with the BLAST: the star formation activity in Abell 3112

Filiberto Braglia, Peter Ade, James Bock, Edward Chapin, Mark Devlin, Alastair Edge, Matthew Griffin, Joshua Gundersen, Mark Halpern, Peter Hargrave, D Hughes, Jeff Klein, Gaelen Marsden, Philip Mauskopf, Lorenzo Moncelsi, Calvin Netterfield, Henry Ngo, Luca Olmi, Enzo Pascale, Guillaume PatanchonKevin Pimbblet, Marie Rex, Douglas Scott, Christopher Semisch, Nicholas Thomas, Matthew Truch, Carole Tucker, Gregory Tucker, Elisabetta Valiante, Marco Viero, Donald Weibe

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    Abstract

    We present observations at 250, 350 and 500I?m of the nearby galaxy cluster Abell 3112 (z= 0.075) carried out with the Balloon-borne Large Aperture Submillimeter Telescope. Five cluster members are individually detected as bright submillimetre (submm) sources. Their far-infrared spectral energy distributions and optical colours identify them as normal star-forming galaxies of high mass, with globally evolved stellar populations. They all have (B-R) colours of 1.38 A? 0.08, transitional between the blue, active population and the red, evolved galaxies that dominate the cluster core.
    Original languageEnglish
    Pages (from-to)1187 - 1202
    Number of pages16
    JournalMonthly Notices of the Royal Astronomical Society
    Volume412
    Issue number2
    DOIs
    Publication statusPublished - 2011

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