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Deep Herschel view of obscured star formation in the Bullet cluster

Rawle, T.D.; Chung, S.M.; Fadda, D.; Rex, M.; Egami, E.; Pérez-Gonzá&lez, P.G.; Altieri, B.; Blain, A.W.; Bridge, C.R.; Fiedler, A.K.; Gonzalez, A.H.; Pereira, M.J.; Richard, J.; Smail, I.; Valtchanov, I.; Zemcov, M.; Appleton, P.N.; Bock, J.J.; Boone, F.; Clement, B.; Combes, F.; Dowell, C.D.; Dessauges-Zavadsky, M.; Ilbert, O.; Ivison, R.J.; Jauzac, M.; Kneib, J.-P.; Lutz, D.; Pelló, R.; Rieke, G.H.; Rodighiero, G.; Schaerer, D.; Smith, G.P.; Walth, G.L.; van der Werf, P.; Werner, M.W.

Deep Herschel view of obscured star formation in the Bullet cluster Thumbnail


Authors

T.D. Rawle

S.M. Chung

D. Fadda

M. Rex

E. Egami

P.G. Pérez-Gonzá&lez

B. Altieri

A.W. Blain

C.R. Bridge

A.K. Fiedler

A.H. Gonzalez

M.J. Pereira

J. Richard

I. Valtchanov

M. Zemcov

P.N. Appleton

J.J. Bock

F. Boone

B. Clement

F. Combes

C.D. Dowell

M. Dessauges-Zavadsky

O. Ilbert

R.J. Ivison

M. Jauzac

J.-P. Kneib

D. Lutz

R. Pelló

G.H. Rieke

G. Rodighiero

D. Schaerer

G.P. Smith

G.L. Walth

P. van der Werf

M.W. Werner



Abstract

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 yr-1. On average, the background system contains brighter far-infrared (FIR) galaxies, with ~50% higher SFRFIR (21 galaxies; 207± 9 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.

Citation

Rawle, T., Chung, S., Fadda, D., Rex, M., Egami, E., Pérez-Gonzá&lez, P., …Werner, M. (2010). Deep Herschel view of obscured star formation in the Bullet cluster. Astronomy & Astrophysics, 518, Article L14. https://doi.org/10.1051/0004-6361/201014681

Journal Article Type Article
Publication Date Jul 1, 2010
Deposit Date May 28, 2013
Publicly Available Date Jun 14, 2013
Journal Astronomy and astrophysics.
Print ISSN 0004-6361
Electronic ISSN 1432-0746
Publisher EDP Sciences
Peer Reviewed Peer Reviewed
Volume 518
Article Number L14
DOI https://doi.org/10.1051/0004-6361/201014681
Keywords Galaxies, Clusters, Bullet cluster, Star formation, Infrared, Submillimeter.

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