Cooled Gas in X-Ray Emitting Elliptical Galaxies

Details Cooled Gas in X-Ray Emitting Elliptical Galaxies Cooled Gas in X-Ray Emitting Elliptical Galaxies

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7291b&link_type=abstract

HST Proposal ID #7291

Physics

Hst Proposal Id #7291 Quasar Absorption Lines

Scientific paper

There are two fundamental predictions of the current popular model for X-ray emitting gas in individual elliptical galaxies: that the origin of the gas is stellar mass loss, and that the X-ray emission cools the gas, leading to cooled material distributed throughout the galaxy. We will test these predictions by searching for the expected resonance absorption lines against quasars projected behind the X-ray emitting early-type galaxies NGC 4203 and NGC 4261. In Cycle 6 we were awarded time to search for low-ionization metal lines {observations not yet obtained} and here we propose to search for absorption by high ionization ions {ionSi4 and ionC4} and from Ly-alpha. These observations should be an extremely sensitive test of the elliptical galaxy cooling flow picture.

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