LoCuSS: A Herschel view of obscured star formation in Abell 1835

We present Herschel/PACS, MMT/Hectospec and XMM-Newton observations of Abell 1835, one of the brightest X-ray clusters on the sky, and the host of a strong cool core. Even though Abell 1835 has a prototypically "relaxed" X-ray morphology and no signs of ongoing merger activity in strong- a...

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Bibliographic Details
Published in:arXiv.org 2010-05
Main Authors: Pereira, M J, Haines, C P, Smith, G P, Egami, E, Moran, S M, Finoguenov, A, Hardegree-Ullman, E, Okabe, N, Rawle, T, Rex, M
Format: Article
Language:English
Subjects:
Deposition
Galactic clusters
Galaxies
Infrared astronomy
Morphology
Space telescopes
Star & galaxy formation
Star clusters
Star formation
Stars & galaxies
Velocity distribution
XMM (spacecraft)
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Summary:We present Herschel/PACS, MMT/Hectospec and XMM-Newton observations of Abell 1835, one of the brightest X-ray clusters on the sky, and the host of a strong cool core. Even though Abell 1835 has a prototypically "relaxed" X-ray morphology and no signs of ongoing merger activity in strong- and weak-lensing mass maps, it has a complex velocity distribution, suggesting that it is still accreting significant amounts of mass in the form of smaller satellite systems. Indeed, we find strong dynamical segregation of star-forming dusty galaxies from the optically selected cluster population. Most Herschel sources are found close to the virial radius of the cluster, and almost a third appear to be embedded within a filament feeding the cluster from the SW. We find that the most luminous infrared galaxies are likely involved in galaxy-galaxy interactions that may have triggered the current phase of star formation.
ISSN:2331-8422
DOI:10.48550/arxiv.1005.3813