HerMES : SPIRE detection of high redshift massive compact galaxies in GOODS-N field

Abstract

We have analysed the rest-frame far infrared (FIR) properties of a sample of massive (Mstar > 10^11Msun) galaxies at 2<z<3 in the GOODS (Great Observatories Origins Deep Survey) North field using the Spectral and Photometric Imaging Receiver (SPIRE) instrument aboard the Herschel Space Observatory. To conduct this analysis we take advantage of the data from the HerMES key program. The sample comprises 45 massive galaxies with structural parameters characterised with HST NICMOS-3. We study detections at submm Herschel bands, together with Spitzer 24μm data, as a function of the morphological type, mass and size. We find that 26/45 sources are detected at MIPS-24μm and 15/45 (all MIPS-24μm detections) are detected at SPIRE-250μm, with disk-like galaxies more easily detected. We derive star formation rates (SFR) and specific star formation rates (sSFR) by fitting the spectral energy distribution (SED) of our sources, taking into account non-detections for SPIRE and systematic effects for MIPS derived quantities. We find that the mean SFR for the spheroidal galaxies (50-100 Msun*yr^-1) is substantially (a factor ~ 3) lower than the mean value presented by disk-like galaxies (250-300 Msun*yr^-1).

arXiv comment6 pages, 3 figure, 1 table, MNRAS Herschel issue, in V2 added references and corrected typos

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Cited by in corpus (13)

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