Deep Herschel view of obscured star formation in the Bullet cluster
T. D. Rawle
(1)
,
S. M. Chung
(2)
,
D. Fadda
(2)
,
M. Rex
(3)
,
E. Egami
(1)
,
P. G. Pérez-González
(4)
,
B. Altieri
(5)
,
A. W. Blain
(6)
,
C. R. Bridge
(6)
,
A. K. Fiedler
(2)
,
A. H. Gonzalez
(2)
,
M. J. Pereira
(1)
,
J. Richard
(7)
,
I. Smail
(8)
,
I. Valtchanov
(2)
,
M. Zemcov
(2)
,
P. N. Appleton
(2)
,
J. J. Bock
(2)
,
F. Boone
(9)
,
B. Clement
(10)
,
F. Combes
(11)
,
C. D. Dowell
(2)
,
M. Dessauges-Zavadsky
(12)
,
O. Ilbert
(10)
,
R. J. Ivison
(13)
,
M. Jauzac
(10)
,
J.-P. Kneib
(10)
,
D. Lutz
(14)
,
R. Pelló
(9)
,
G. H. Rieke
(1)
,
G. Rodighiero
(2)
,
D. Schaerer
(9)
,
G. P. Smith
(15)
,
G. L. Walth
(1)
,
P. van Der Werf
(16)
,
M. W. Werner
(2)
1
Steward Observatory
2 AUTRES
3 AWI - Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine
4 Departamento de Física y Astronomía
5 XMM-Newton Science Operations Centre
6 Department of Astronomy
7 CRAL - Centre de Recherche Astrophysique de Lyon
8 ICC - Institute for Computational Cosmology
9 IRAP - Institut de recherche en astrophysique et planétologie
10 LAM - Laboratoire d'Astrophysique de Marseille
11 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
12 ObsGE - Observatoire Astronomique de l'Université de Genève
13 ROE - Royal Observatory Edinburgh
14 MPE - Max-Planck-Institut für Extraterrestrische Physik
15 UAB - University of Alabama at Birmingham [ Birmingham]
16 Leiden Observatory [Leiden]
2 AUTRES
3 AWI - Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine
4 Departamento de Física y Astronomía
5 XMM-Newton Science Operations Centre
6 Department of Astronomy
7 CRAL - Centre de Recherche Astrophysique de Lyon
8 ICC - Institute for Computational Cosmology
9 IRAP - Institut de recherche en astrophysique et planétologie
10 LAM - Laboratoire d'Astrophysique de Marseille
11 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
12 ObsGE - Observatoire Astronomique de l'Université de Genève
13 ROE - Royal Observatory Edinburgh
14 MPE - Max-Planck-Institut für Extraterrestrische Physik
15 UAB - University of Alabama at Birmingham [ Birmingham]
16 Leiden Observatory [Leiden]
B. Altieri
- Fonction : Auteur
- PersonId : 755642
- ORCID : 0000-0003-3936-0284
J. Richard
- Fonction : Auteur
- PersonId : 84
- IdHAL : johan-richard
- ORCID : 0000-0001-5492-1049
- IdRef : 095319204
D. Lutz
- Fonction : Auteur
- PersonId : 755584
- ORCID : 0000-0003-0291-9582
Résumé
We use deep, five band (100-500 μm) data from the Herschel Lensing Survey (HLS) to fully constrain the obscured star formation rate, SFRFIR, of galaxies in the Bullet cluster (z = 0.296), and a smaller background system (z = 0.35) in the same field. Herschel detects 23 Bullet cluster members with a total SFRFIR = 144±14 M&sun; yr-1. On average, the background system contains brighter far-infrared (FIR) galaxies, with ~50% higher SFRFIR (21 galaxies; 207± 9 M&sun; yr-1). SFRs extrapolated from 24 μm flux via recent templates (SFR24 µm) agree well with SFRFIR for ~60% of the cluster galaxies. In the remaining ~40%, SFR24 µm underestimates SFRFIR due to a significant excess in observed S100/S24 (rest frame S75/S18) compared to templates of the same FIR luminosity. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. Data presented in this paper were analyzed using "The Herschel Interactive Processing Environment (HIPE)", a joint development by the Herschel Science Ground Segment Consortium, consisting of ESA, the NASA Herschel Science Center, and the HIFI, PACS and SPIRE consortia.