A Little About Me

I am currently a Visiting Assistant Professor at the University of Iowa Department of Physics and Astronomy. Prior to coming to Iowa, I was a Bolton Postdoctoral Fellow at CSIRO Astronomy & Space Science, and my interests are Cosmology and Extragalactic astrophysics. I work mainly as a radio astronomer, using powerful telescopes such as the Australia Telescope Compact Array, the Very Large Array, the Greenbank Telescope, and the Westerbork Synthesis Radio Telescope array.

Last Updated: (September 23th, 2011).

Recent Research Highlights:

Off-State of Giant Radio Halos Detected

In a paper recently published in ApJ Letters, we have stacked massive, radio-quiet clusters of galaxies in the SUMSS survey (834 MHz) to detect their "off-state" synchrotron emissivity.

Radio-selected double relic cluster discovered!

We have published in ApJ Letters an exciting new cluster of galaxies. This cluster is unique because: 1) It's a new merging cluster, selected on radio properties alone; 2) It's a rare double relic and halo system; 3) It has unique multiple internal radio filaments (shocks?); 4) To has two clear cases of partial shock illumination (like Coma and Abell 548, but much more straightforward); 5) It's does not follow the radio/X-ray luminosity correlation for cluster radio halos. More to come later...black contours are VLA L-band and red are 3' RASS X-ray continuum (0.1-2.4 keV).

Coma cluster paper accepted to MNRAS

We report the discovery of two new shock-structures in the famous Coma cluster of galaxies. The paper can be found on astro-ph or here.

EVLA and ATCA Deep Cluster Survey Pilots Accepted

We have been granted time on both the EVLA and the ATCA for pilot observations preparing for two deep cluster surveys. For the EVLA-DCS, you can find more information here.

Under Construction!

A Good Time for Radio Astronomy!

Right now the field of radio astronomy is experiencing a period of rapid growth. New radio telescopes are being designed and built all around the world, and there has never been a better time to be a graduate student working in the radio regime. Many existing radio facilities, such as the VLA, VLBA, WSRT, GBT, GMRT, DRAO, Arecibo, ATCA, Parks, Effelsberg, EVN, MERLIN, and the SMA (just to name a few), are still producing important results across many fields of astrophysics. Even more exciting is the impressive list of new major projects planned for the coming decade. Here is a short list (a few are almost operational now):

Contact Information

CSIRO Astronomy & Space Science
E-Mail: shea.brown@csiro.au


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