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The First Bent Double Lobe Radio Source in a Known Cluster Filament: Constraints on the Intrafilament Medium

Edwards, Louise O. V. and Fadda, Dario and Frayer, David T. (2010) The First Bent Double Lobe Radio Source in a Known Cluster Filament: Constraints on the Intrafilament Medium. Astrophysical Journal Letters, 724 (2). L143-L147. ISSN 2041-8205. http://resolver.caltech.edu/CaltechAUTHORS:20101221-143418316

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Abstract

We announce the first discovery of a bent double lobe radio source (DLRS) in a known cluster filament. The bent DLRS is found at a distance of 3.4 Mpc from the center of the rich galaxy cluster, A1763. We derive a bend angle α = 25°, and infer that the source is most likely seen at a viewing angle of Φ = 10°. From measuring the flux in the jet between the core and further lobe and assuming a spectral index of 1, we calculate the minimum pressure in the jet, (8.0 ± 3.2) × 10^(–13) dyn cm^(–2), and derive constraints on the intrafilament medium (IFM) assuming the bend of the jet is due to ram pressure. We constrain the IFM to be between (1-20) × 10^(–29) gm cm^(–3). This is consistent with recent direct probes of the IFM and theoretical models. These observations justify future searches for bent double lobe radio sources located several megaparsecs from cluster cores, as they may be good markers of super cluster filaments.


Item Type:Article
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http://dx.doi.org/10.1088/2041-8205/724/2/L143DOIUNSPECIFIED
http://iopscience.iop.org/2041-8205/724/2/L143/PublisherUNSPECIFIED
Additional Information:© 2010 The American Astronomical Society. Received 2010 September 1; accepted 2010 October 20; published 2010 November 8. We thank the scientific staff at the NRAO, in particular G. Van Moorsel for help with observation planning and F. Owen for help with data reduction techniques. We thank L. Storrie- Lombardi and P. Appleton for fruitful discussions. Support for this work was provided by NASA through an award issued by JPL/Caltech. This work is based in part on original observations using the Very Large Array operated by the NRAO. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Facilities: VLA, WIYN (Hydra)
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NASAUNSPECIFIED
Subject Keywords:galaxies: clusters: individual (A1763, A1770); galaxies: clusters: intracluster medium; large-scale structure of universe; radio continuum: galaxies
Classification Code:PACS: 98.65.Cw; 98.70.Dk; 98.62.Nx; 98.65.Hb
Record Number:CaltechAUTHORS:20101221-143418316
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20101221-143418316
Official Citation:Louise, O. V. E. and et al. (2010). "The First Bent Double Lobe Radio Source in a Known Cluster Filament: Constraints on the Intrafilament Medium." The Astrophysical Journal Letters 724(2): L143. doi: 10.1088/2041-8205/724/2/L143
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21488
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Jan 2011 18:42
Last Modified:29 Aug 2014 14:46

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