Abstract
Wehave analysed the rest-frame far-infrared properties ofa sample of massive (M* > 1011 M⊙) galaxies at 2 ≲ z ≲ 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-μm data, as a function of the morphological type, mass and size. We find that 26/45 sources are detected at MIPS 24 μm and 15/45 (all MIPS 24-μm detections) are detected at SPIRE 250 μ 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 (~50-100M⊙ yr-1) is substantially (a factor ~3) lower than the mean value presented by disc-like galaxies (~250-300M⊙ yr-1).
Original language | English (US) |
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Pages (from-to) | L19-L24 |
Journal | Monthly Notices of the Royal Astronomical Society: Letters |
Volume | 409 |
Issue number | 1 |
DOIs | |
State | Published - Nov 2010 |
Externally published | Yes |
Keywords
- Galaxies: evolution
- Galaxies: high-redshift
- Galaxies: star formation
- Infrared: galaxies
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science