Iron Line Spectroscopy of Clusters of Galaxies

Details Iron Line Spectroscopy of Clusters of Galaxies Iron Line Spectroscopy of Clusters of Galaxies

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop...33k&link_type=abstract

Chandra Proposal ID #01800303

Physics

Chandra Proposal Id #01800303

Scientific paper

We propose to study optical depth effects in bright clusters of galaxies using AXAF's ACIS detector. The optical depth for resonance scattering of a few strong Fe-K and Fe-L lines is larger than unity for our targets A 496, MKW3s and A S1101. This allows us to directly measure ionic column densities. Combining these with ionic volume emission measures allows a determination of the Hubble constant, or limits to the turbulence in the cooling flow. The deep exposures that are required allow also the spatial and spectral study of inhomogeneities in the cooling flow on a scale of 10 arcsec.

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