Investigation Of The Diffuse IGM By Cross-Correlation Studies

Damon Farnsworth; Shea Brown; Lawrence Rudnick

doi:10.1063/1.3293081

Investigation Of The Diffuse IGM By Cross-Correlation Studies

Damon Farnsworth, Shea Brown Lawrence Rudnick

MONSTER'S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS, Vol.1201(1), pp.37-40

AIP Conference Proceedings

06/05/2009

: 10.1063/1.3293081

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 21 cm, 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 3 sigma upper limits to the diffuse emission in units of flux per galaxy; these correspond to filament equipartition magnetic fields as low as 0.2 mu G. 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.

Physical Sciences

Astronomy & Astrophysics

Science & Technology

: Investigation Of The Diffuse IGM By Cross-Correlation Studies
: Damon Farnsworth - University of Minnesota
Shea Brown - University of Minnesota
Lawrence Rudnick - University of Minnesota
: S Heinz (Editor)
E Wilcots (Editor)
: Conference proceeding
: MONSTER'S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS, Vol.1201(1), pp.37-40
: Amer Inst Physics
: AIP Conference Proceedings
: 10.1063/1.3293081
: 0094-243X
: 1551-7616
: 4
: English
: 06/05/2009
: Physics and Astronomy
: 9984429057002771