Probing Gas Stripping in Low-Redshift Groups and Clusters using Wide-Area 24-micron Imaging

Details Probing Gas Stripping in Low-Redshift Groups and Clusters using Wide-Area 24-micron Imaging Probing Gas Stripping in Low-Redshift Groups and Clusters using Wide-Area 24-micron Imaging

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50456f&link_type=abstract

Spitzer Proposal ID #50456

Physics

Scientific paper

We propose to image a 1.42 degree by 2 degree (3.06Mpc x 4.33Mpc) region around 6 low-redshift galaxy groups and clusters using MIPS in scan mode. The primary goal of this proposal is to map the spatial distribution of star-formation within star-forming cluster galaxies as a function of the X-ray luminosity of their environments. By combining these new Spitzer observations with existing Spitzer archive observations of more massive local clusters, we will probe star-formation in environments that span the full range of X-ray luminosities. These observations will help determine the relative importance of galaxy-galaxy interactions, starvation, and ram-pressure stripping in driving the evolution of galaxies from blue to red. All clusters have extensive ancillary data including: multi-band photometry for all members and spectroscopy for 90% of cluster members from the Sloan Digital Sky Survey; HI observations covering the entire extent of the MIPS scan maps, giving a more detailed picture of the gas; and Chandra observations, which will help characterize the hot intra-cluster gas. Secondary science goals of these observations include: measuring the IR luminosity function for local clusters; providing a low-redshift baseline for the Spitzer observations of 0.4 < z < 1 clusters; and determining the bias in star-formation studies based on SDSS and 2dF spectroscopy.

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