The Dynamics of the Hot ISM in Early-Type Galaxies

Details The Dynamics of the Hot ISM in Early-Type Galaxies The Dynamics of the Hot ISM in Early-Type Galaxies

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..887d&link_type=abstract

Chandra Proposal ID #03600404

Physics

Chandra Proposal Id #03600404

Scientific paper

Chandra has already made a major contribution to our understanding of the X-ray emission from early-type galaxies by resolving the X-ray binary population in near-by ellipticals. While the diffuse X-ray emission from the most luminous ellipticals almost certainly arises from hot gas in nearly hydrostatic equilibrium, the dynamic state of the ISM in less luminous ellipticals is essentially unknown. Using Chandra's subarcsecond resolution we propose to observe three moderate luminosity ellipticals (N2434, N4203, and N4278) and determine the dynamic state of the hot gas (i.e., cooling flow, partial wind, total subsonic wind, or total transonic wind). This information is a key diagnostic of the past chemical and thermodynamic history of the ISM in elliptical galaxies.

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