An extended Herschel drop-out source in the center of AS1063: A normal dusty galaxy at z = 6.1 or SZ substructures?

F. Boone, B. Clément, J. Richard, D. Schaerer, D. Lutz, A Weiss, M. Zemcov, E. Egami, T. D. Rawle, G. L. Walth, J. P. Kneib, F. Combes, I. Smail, A. M. Swinbank, B. Altieri, A. W. Blain, S. Chapman, A Weiss, M. Dessauges-Zavadsky, R. J. IvisonK. K. Knudsen, A. Omont, R. Pelló, P. G. Pérez-González, I. Valtchanov, P. Van Der Werf, M. Zamojski

Research output: Contribution to journalArticlepeer-review

Abstract

In the course of our 870 μm APEX/LABOCA follow-up of the Herschel Lensing Survey we have detected a source in AS1063 (RXC J2248.7-4431) that has no counterparts in any of the Herschel PACS/SPIRE bands, it is a Herschel "drop-out" with S870=S500 ≥ 0:5. The 870 μm emission is extended and centered on the brightest cluster galaxy, suggesting either a multiply imaged background source or substructure in the Sunyaev-Zel'dovich increment due to inhomogeneities in the hot cluster gas of this merging cluster. We discuss both interpretations with emphasis on the putative lensed source. Based on the observed properties and on our lens model we find that this source may be the first submillimeter galaxy (SMG) with a moderate far-infrared (FIR) luminosity (LFIR.

Original languageEnglish
Article numberA559
JournalAstronomy and Astrophysics
Volume559
DOIs
Publication statusPublished - 13 Oct 2013

Keywords

  • Galaxies: evolution
  • Galaxies: high-redshift
  • Galaxies: star formation
  • Submillimeter: galaxies

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