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Durham University

Department of Physics

Staff profile

Publication details for Professor Ian Smail

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. (2010). Deep Herschel view of obscured star formation in the Bullet cluster. Astronomy & astrophysics 518: L14.

Author(s) from Durham


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