1. The Herschel-PEP survey: evidence for downsizing in the hosts of dusty star-forming systems
- Author
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Eckhard Sturm, L. Riguccini, David J. Rosario, I. Valtchanov, P. Popesso, Linda J. Tacconi, Francesca Pozzi, P. Andreani, Dieter Lutz, N. M. Förster Schreiber, D. Elbaz, H. Aussel, J. Cepa, Roberto Maiolino, Raanan Nordon, Andrea Cimatti, S. Berta, Héctor O. Castañeda, E. Le Floc'h, M. Magliocchetti, M. Sánchez-Portal, P. Santini, Reinhard Genzel, Benjamin Magnelli, Giulia Rodighiero, Bruno Altieri, Albrecht Poglitsch, Carlotta Gruppioni, O. Ilbert, Andrea Grazian, M. Magliocchetti, P. Popesso, D. Rosario, D. Lutz, H. Aussel, S. Berta, B. Altieri, P. Andreani, J. Cepa, H. Castaneda, A. Cimatti, D. Elbaz, R. Genzel, A. Grazian, C. Gruppioni, O. Ilbert, E. Le Floc'h, B. Magnelli, R. Maiolino, R. Nordon, A. Poglitsch, F. Pozzi, L. Riguccini, G. Rodighiero, M. Sanchez-Portal, P. Santini, N. M. Forster Schreiber, E. Sturm, L. Tacconi, and I. Valtchanov
- Subjects
large-scale structure of the Universe ,Luminous infrared galaxy ,Physics ,cosmology: observation ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Limiting ,Astrophysics ,Star (graph theory) ,Correlation function (astronomy) ,Cosmology ,infrared: galaxies ,Extended Groth Strip ,Space and Planetary Science ,cosmology: theory ,galaxies: statistic ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,galaxies: evolution ,Cluster analysis ,Astrophysics::Galaxy Astrophysics ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
By making use of Herschel-PEP observations of the COSMOS and Extended Groth Strip fields, we have estimated the dependence of the clustering properties of FIR-selected sources on their 100um fluxes. Our analysis shows a tendency for the clustering strength to decrease with limiting fluxes: r0(S100um >8 mJy)~4.3 Mpc and r0(S100um >5 mJy)~5.8 Mpc. These values convert into minimum halo masses Mmin~10^{11.6} Msun for sources brighter than 8 mJy and Mmin~10^{12.4} Msun for S100um > 5 mJy galaxies. We show such an increase of the clustering strength to be due to an intervening population of z~2 sources, which are very strongly clustered and whose relative contribution, equal to about 10% of the total counts at S100um > 2 mJy, rapidly decreases for brighter flux cuts. By removing such a contribution, we find that z ~100 Msun/yr). Our analysis shows that the same amount of (intense) star forming activity takes place in extremely different environments at the different cosmological epochs. For z, Comment: 12 pages, 8 figures, to appear in MNRAS
- Published
- 2013
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