Young Elliptical Galaxies and the Evolution of the Hot Interstellar Medium

Details Young Elliptical Galaxies and the Evolution of the Hot Interstellar Medium Young Elliptical Galaxies and the Evolution of the Hot Interstellar Medium

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..647s&link_type=abstract

Chandra Proposal ID #02600844

Computer Science

Chandra Proposal Id #02600844

Scientific paper

How the hot interstellar medium in elliptical galaxies should evolve with time is extremely model dependent. On few-Gyr timescales, the diffuse X-ray emission may grow brighter or fainter, larger or smaller, softer or harder, depending on the competition between heating, cooling, gravity, and environmental effects. We will study the time evolution of the hot ISM empirically by observing a sample of young ellipticals with ACIS-S. The sample defines an age sequence at the same optical luminosity and environment. We will obtain accurate X-ray surface brightness profiles, derive radial profiles of gas density, temperature, and metallicity within the optical radii, and search for substructure related to inhomogeneous gas flows, tidal debris, and interactions with neighboring systems.

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