Dust Disks and the Evolution of s0 Galaxies

Details Dust Disks and the Evolution of s0 Galaxies Dust Disks and the Evolution of s0 Galaxies

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2466w&link_type=abstract

Chandra Proposal ID #09610400

Physics

Chandra Proposal Id #09610400

Scientific paper

We propose Chandra observations of three edge-on S0 galaxies with dusty disks to determine whether their survival against sputtering is due either to their having insubstantial hot atmospheres or ongoing star formation. Since dust is readily destroyed by sputtering in hot atmospheres, one expects only small amounts due to stellar mass loss over a dust sputtering lifetime (~10^7 yr). The more substantial amounts of dust seen in these S0s indicate that dust is replenished by ongoing star formation (either residual secular star formation or that associated with a recent merger) and/or resides in a less hostile sputtering environment: an insubstantial atmosphere characterized by a low X-ray (gas) to optical (stellar) luminosity ratio. Chandra observations can constrain either case.

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