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Herschel/SPIRE colors of galaxies at z>2.5

Published online by Cambridge University Press:  17 August 2016


F.-T. Yuan
Affiliation:
Shanghai Astronomical Observatory, CAS, 80 Nandan Road, Shanghai 200030, China email: yuanft@shao.ac.cn
V. Buat
Affiliation:
Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
D. Burgarella
Affiliation:
Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
L. Ciesla
Affiliation:
University of Crete, Department of Physics, Heraklion 71003, Greece Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, GR-15236 Penteli, Greece
S. Heinis
Affiliation:
Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France Department of Astronomy, University of Maryland, College Park, MD20742-2421, USA
S. Shen
Affiliation:
Shanghai Astronomical Observatory, CAS, 80 Nandan Road, Shanghai 200030, China email: yuanft@shao.ac.cn
Z.-Y. Shao
Affiliation:
Shanghai Astronomical Observatory, CAS, 80 Nandan Road, Shanghai 200030, China email: yuanft@shao.ac.cn
J. -L. Hou
Affiliation:
Shanghai Astronomical Observatory, CAS, 80 Nandan Road, Shanghai 200030, China email: yuanft@shao.ac.cn
Corresponding
E-mail address:

Abstract

We compiled a sample of 57 galaxies with spectroscopically confirmed redshifts and SPIRE detections in all three bands at z = 2.5-6.4, and compared their SPIRE colors with SED templates from local and high-z libraries. We find that local calibrations are inconsistent with high-z observations. For high-z libraries, the templates with an evolution from z = 0 to 3 can describe the average colors of the observations at high redshift well. Based on the templates, we defined color cuts to divide the SPIRE color-color diagram into different regions with different mean redshifts. We tested this method and two other color cut methods using a larger sample (783 galaxies) with photometric redshifts. We find that these color cuts can separate the sample into subsamples with different mean redshifts, but the dispersion of redshifts in each subsample is considerably large. Additional information is needed for better sampling.


Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2016 

References

Yuan, F.-T., Buat, V., Burgarella, D., et al. 2015, A&A, 582, A90 Google Scholar

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Herschel/SPIRE colors of galaxies at z>2.5
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