Abstract
We have analysed the rest-frame far-infrared properties of a sample of massive (M-* > 10(11) M-circle dot) galaxies at 2 less than or similar to z less than or similar to 3 in the Great Observatories Origins Deep Survey-North (GOODS-N) 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 Herschel Multi-tiered Extragalactic Survey (HerMES) key programme. The sample comprises 45 massive galaxies with structural parameters characterized with HST NICMOS-3. We study detections at submm Herschel bands, together with Spitzer 24-mu m data, as a function of the morphological type, mass and size. We find that 26/45 sources are detected at MIPS 24 mu m and 15/45 (all MIPS 24-mu m detections) are detected at SPIRE 250 mu m, with disc-like galaxies more easily detected. We derive star formation rates (SFRs) and specific star formation rates (sSFRs) by fitting the spectral energy distribution 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 (similar to 50-100 M-circle dot yr(-1)) is substantially (a factor similar to 3) lower than the mean value presented by disc-like galaxies (similar to 250-300 M-circle dot yr(-1)).
Original language | English |
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Pages (from-to) | L19-L24 |
Number of pages | 6 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 409 |
Issue number | 1 |
DOIs | |
Publication status | Published - Nov 2010 |
Keywords / Materials (for Non-textual outputs)
- galaxies: evolution
- galaxies: high-redshift
- galaxies: star formation
- infrared: galaxies