On the Hot Intracluster Medium and Halo Microlensing Events

Details On the Hot Intracluster Medium and Halo Microlensing Events On the Hot Intracluster Medium and Halo Microlensing Events

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aps..may.f1012f&link_type=abstract

American Physical Society, APS/AAPT Joint Meeting, May 2-5, 1996, abstract #F10.12

Physics

Scientific paper

We describe the formation of hot intracluster gas along with baryonic remnants in galactic halos. A schematic hierarchical model is constructed to describe the formation of protogalactic clouds, galaxies, and clusters. In this model the hot intracluster gas is produced from a combination of merger induced heating and hot stellar ejecta. We relate the mass and metallicity of the hot intergalactic gas directly to the production of baryonic remnants during the collapse of protogalactic halos. We show that a self consistent model can be constructed which accounts both for the hot intracluster medium in galaxy clusters and the prevalence of low mass remnants in galactic halos as suggested be the observed microlensing objects in the halo of the Galaxy. This study suggests that the microlensing objects in the halo may predominantly be ~ 0.5 M_solar white dwarfs, assuming the initial mass function for early star formation favored the formation of intermediate mass stars with m ^>_ ~ 1 M_solar.

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