Physics
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3440x&link_type=abstract
Spitzer Proposal ID #3440
Physics
Scientific paper
Stephan's Quintet (SQ) is the best studied example of the compact group phenomenon and provides the first solid evidence for diffuse IGM dust emission. We propose MIPS 70um and 160um observations in the raster mapping mode, and IRS observations with SH, LH, SL 1st-order and SL 2nd-order modules in the staring mode. The observations will search for clues to the origin of diffuse IGM dust emission that we detected with ISO. They will also set constraints to physical models for IGM dust destruction in the large scale shock that was triggered by a high speed collision (~ 1000 km/sec) between an intruder galaxy and the IGM. A 6' x 6' area will be mapped with MIPS to study the spatial distribution and heating mechanism of the diffuse dust. In addition two positions in the shock front will be observed with IRS to probe PAH destruction and the physical conditions in the ionized medium of the shock. The observations will shed new light on the so-called `feedback' processes governing the exchange of mass, metals and energy between galaxies and their external environment.
Appleton Phil
Dopita Michael
Lu Nanyao Y.
Popescu Cristina
Sulentic Jack
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