DIFFUSE CLUSTER-LIKE RADIO EMISSION IN POOR ENVIRONMENTS

Shea Brown; Lawrence Rudnick

doi:10.1088/0004-6256/137/2/3158

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DIFFUSE CLUSTER-LIKE RADIO EMISSION IN POOR ENVIRONMENTS

Journal article

Open access

Peer reviewed

DIFFUSE CLUSTER-LIKE RADIO EMISSION IN POOR ENVIRONMENTS

Shea Brown and Lawrence Rudnick

The Astronomical journal, Vol.137(2), pp.3158-3171

02/01/2009

DOI: 10.1088/0004-6256/137/2/3158

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Abstract

We present a study of the spectral, polarimetric, morphological, and environmental properties of the diffuse radio source 0809+39 using observations taken with the Westerbork Synthesis Radio Telescope, the Very Large Array, and archival optical and X-ray data. The source has two distinct diffuse, steep-spectrum components, one in the north that is highly polarized, and a linear southern component undetected in polarization. We discuss several plausible origins for each component, and conclude that the northern bright polarized component is most likely a radio relic associated with a poor z similar to 0.2 cluster of galaxies, with a radio/X-ray luminosity ratio two orders of magnitude above typical values. The southern component is aligned with a more extended filament of galaxies similar to 5 Mpc long at z similar to 0.04. Deep optical and X-ray follow-ups are still needed in order to confirm and understand the physical origins of the synchrotron emission. Whatever the details of these origins, 0809+39 highlights the utility of synchrotron radiation for illuminating the diffuse components of low density environments unrelated to rich clusters.

Astronomy & Astrophysics

Physical Sciences

Science & Technology

Details

Title: Subtitle: DIFFUSE CLUSTER-LIKE RADIO EMISSION IN POOR ENVIRONMENTS
Creators: Shea Brown - University of Minnesota
Lawrence Rudnick - University of Minnesota
Resource Type: Journal article
Publication Details: The Astronomical journal, Vol.137(2), pp.3158-3171
DOI: 10.1088/0004-6256/137/2/3158
ISSN: 0004-6256
eISSN: 1538-3881
Publisher: Iop Publishing Ltd
Number of pages: 14
Grant note: 0908668 / Direct For Mathematical & Physical Scien; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS)
Language: English
Date published: 02/01/2009
Academic Unit: Physics and Astronomy
Record Identifier: 9984428826602771

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