The Herschel Filament: a signature of the environmental drivers of galaxy evolution during the assembly of massive clusters at z=0.9

Kristen Coppin, James Geach, Tracy Webb, Ashley Faloon, Renbin Yan, Daniel O'Donnell, Nathalie Ouellette, Eiichi Egami, Erica Ellingson, David Gilbank, Amalia Hicks, L. Felipe Barrientos, Howard Yee, Michael Gladders

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
119 Downloads (Pure)

Abstract

We have discovered a 2.5 Mpc (projected) long filament of infrared-bright galaxies connecting two of the three ~5x10^14 Msun clusters making up the RCS 2319+00 supercluster at z=0.9. The filament is revealed in a deep Herschel Spectral and Photometric Imaging REceiver (SPIRE) map that shows 250-500um emission associated with a spectroscopically identified filament of galaxies spanning two X-ray bright cluster cores. We estimate that the total (8-1000um) infrared luminosity of the filament is Lir~5x10^12 Lsun, which, if due to star formation alone, corresponds to a total SFR 900 Msun/yr. We are witnessing the scene of the build-up of a >10^15 Msun cluster of galaxies, seen prior to the merging of three massive components, each of which already contains a population of red, passive galaxies that formed at z>2. The infrared filament demonstrates that significant stellar mass assembly is taking place in the moderate density, dynamically active circumcluster environments of the most massive clusters at high-redshift, and this activity is concomitant with the hierarchical build-up of large scale structure.
Original languageEnglish
Article numberL43
JournalThe Astrophysical Journal
Volume749
DOIs
Publication statusPublished - 2012

Fingerprint

Dive into the research topics of 'The Herschel Filament: a signature of the environmental drivers of galaxy evolution during the assembly of massive clusters at z=0.9'. Together they form a unique fingerprint.

Cite this