Detecting extended intracluster dust emission in Abell 2029

Details Detecting extended intracluster dust emission in Abell 2029 Detecting extended intracluster dust emission in Abell 2029

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30889r&link_type=abstract

Spitzer Proposal ID #30889

Computer Science

Scientific paper

Detecting dust in the hot intracluster gas has been a goal for a number of infrared missions. There are a number of tentative detections, but they are generally not confirmed with further observation. If interpreted as upper limits, the non-detection or the weak detection of this dust component by IRAS and ISO in many clusters suggests a strongly dust-depleted intracluster plasma, which is believed arises due to sputtering. Using MIPS 24 micron data for Abell 2029, we have detected a weak signal of this extended emission in the cluster core, coincident with the X-ray peak. Unlike previous studies, the resolution of MIPS allows us to remove the contributions of the cluster galaxies. Also, the instrument stability and the long baseline observation mode we used minimize the systematic error of the signal. Nonetheless, the detection is not solidly established. Therefore, we are asking for three times longer exposure time to achieve a secure detection of this extended dust emission.

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