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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2012

Herschel observations of a z similar to 2 stellar mass selected galaxy sample drawn from the GOODS NICMOS Survey

M. Hilton
I. G. Roseboom
  • Fonction : Auteur
D. Burgarella
V. Buat
M. Béthermin
J. Bock
  • Fonction : Auteur
D. L. Clements
  • Fonction : Auteur
D. Farrah
  • Fonction : Auteur
B. Magnelli
S. J. Oliver
  • Fonction : Auteur

Résumé

We present a study of the far-infrared (IR) properties of a stellar mass selected sample of 1.5 \textless z \textless 3 galaxies with log?(M*/M?) \textgreater 9.5 drawn from the Great Observatories Origins Deep Survey (GOODS) Near Infrared Camera and Multi-Object Spectrometer (NICMOS) Survey (GNS), the deepest H-band Hubble Space Telescope survey of its type prior to the installation of Wide Field Camera 3 (WFC3). We use far-IR and submm data from the Photoconductor Array Camera and Spectrometer (PACS) and Spectral and Photometric Imaging Receiver (SPIRE) instruments on-board Herschel, taken from the PACS Evolutionary Probe (PEP) and Herschel Multi-Tiered Extragalactic Survey (HerMES) key projects, respectively. We find a total of 22 GNS galaxies, with median log?(M*/M?) = 10.8 and z = 2.0, associated with 250?mu m sources detected with signal-to-noise ratio (SNR) \textgreater 3. We derive mean total IR luminosity log?LIR(L?) = 12.36 +/- 0.05 and corresponding star formation rate (SFR)IR + UV = (280 +/- 40)?M??yr-1 for these objects, and find them to have mean dust temperature Tdust similar to 35?K. We find that the SFR derived from the far-IR photometry combined with ultraviolet (UV)-based estimates of unobscured SFR for these galaxies is on average more than a factor of 2 higher than the SFR derived from extinction-corrected UV emission alone, although we note that the IR-based estimate is subject to substantial Malmquist bias. To mitigate the effect of this bias and extend our study to fainter fluxes, we perform a stacking analysis to measure the mean SFR in bins of stellar mass. We obtain detections at the 24s level at SPIRE wavelengths for samples with log?(M*/M?) \textgreater 10. In contrast to the Herschel detected GNS galaxies, we find that estimates of SFRIR + UV for the stacked samples are comparable to those derived from extinction-corrected UV emission, although the uncertainties are large. We find evidence for an increasing fraction of dust obscured star formation with stellar mass, finding SFR IR / SFR UV ?M*0.7 +/- 0.2, which is likely a consequence of the massmetallicity relation.

Dates et versions

hal-01442201 , version 1 (20-01-2017)

Identifiants

Citer

M. Hilton, C. J. Conselice, I. G. Roseboom, D. Burgarella, V. Buat, et al.. Herschel observations of a z similar to 2 stellar mass selected galaxy sample drawn from the GOODS NICMOS Survey. Monthly Notices of the Royal Astronomical Society, 2012, 425 (1), pp.540--555. ⟨10.1111/j.1365-2966.2012.21499.x⟩. ⟨hal-01442201⟩
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