Mid-Infrared Imaging of the Taffy Colliding Galaxy Pairs UGC 813/6 and Arp 261

Details Mid-Infrared Imaging of the Taffy Colliding Galaxy Pairs UGC 813/6 and Arp 261 Mid-Infrared Imaging of the Taffy Colliding Galaxy Pairs UGC 813/6 and Arp 261

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50454s&link_type=abstract

Spitzer Proposal ID #50454

Physics

Scientific paper

In Taffy galaxies, a head-on collision between two gas-rich equal-mass galaxies has occurred, stripping out a large quantity of gas from the disks, and creating a radio continuum-bright bridge between the two galaxies. To better understand the physics of dust formation, excitation, and destruction, an examination of the dust properties in these unusual systems would be useful. We propose to use Spitzer to obtain mid-infrared images of two candidate Taffy systems, UGC 813/6 and Arp 261. We will use these images to search for dust associated with the bridge, and to test for PAH destruction or dust heating by shocks during the impact. We will compare the data for these two systems with archival Spitzer data for the first Taffy galaxy discovered, UGC 12914/5. We will also compare with results from a Spitzer imaging survey of nearby interacting galaxies that we have recently completed, and with numerical simulations of the collisions between the galaxies.

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