Chandra Observation of a Dark Matter Galaxy in the Virgo Cluster

Details Chandra Observation of a Dark Matter Galaxy in the Virgo Cluster Chandra Observation of a Dark Matter Galaxy in the Virgo Cluster

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2725m&link_type=abstract

Chandra proposal ID #10620022

Physics

Scientific paper

A recent HI survey of the Virgo cluster detected several isolated HI clouds. One of these, VIRGOHI21, shows clear evidence of rotation in its HI spectrum: its properties are all typical for normal luminous galaxies. According to the Tully-Fischer relation, the galaxy should be of 12-th mag in V; yet, deep optical follow-up observations reveal a limit consistent with the sky background. VIRGOHI21 thus appears to be the first detection of a population of dark matter halos, or `dark' galaxies, often predicted by theory but whose detection has so far been elusive. We wish to test for the presence of diffuse X-ray emission associated with this dark galactic halo.

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