Investigation of the diffuse IGM by cross-correlation studies

Damon Farnsworth, Shea Brown, Lawrence Rudnick

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present results from the first cross-correlation search for the synchrotron component of the diffuse intergalactic medium (IGM) in filamentary large scale structure (LSS). We used the low resolution (36') Bonn survey at 21cm, with the infrared 2MASS catalog as a tracer of the LSS. Synchrotron emission likely results from LSS formation shocks and feedback from AGN and galactic winds [2]. We determined 3σupper limits to the diffuse emission in units of flux per galaxy; these correspond to filament equipartition magnetic fields as low as 0.2 μG. The detection threshold for the average (peak) filament brightness is 1 (7) mK for 0.03<z<0.04, far below the 50 mK effective sensitivity of the Bonn survey, demonstrating the power of this technique.

Original languageEnglish (US)
Title of host publicationMonster's Fiery Breath
Subtitle of host publicationFeedback in Galaxies, Groups, and Clusters - Proceedings of the International Conference
Pages37-40
Number of pages4
DOIs
StatePublished - Dec 1 2009
EventInternational Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters - Madison, WI, United States
Duration: Jun 1 2009Jun 5 2009

Publication series

NameAIP Conference Proceedings
Volume1201
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference on Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters
CountryUnited States
CityMadison, WI
Period6/1/096/5/09

Keywords

  • Cosmic web
  • Intergalactic medium
  • Large-scale structure
  • Radio synchrotron

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