Ultra-Luminous x-Ray Sources in the Most Metal-Poor Galaxies

Details Ultra-Luminous x-Ray Sources in the Most Metal-Poor Galaxies Ultra-Luminous x-Ray Sources in the Most Metal-Poor Galaxies

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop12018p&link_type=abstract

HST Proposal ID #12018. Cycle 17

Mathematics

Logic

Scientific paper

There is growing observational and theoretical evidence to suggest that Ultra-Luminous X-ray sources {ULX} form preferentially in low metallicity environments. Here we propose a survey of 27 nearby {< 30Mpc} star-forming Extremely Metal Poor Galaxies {Z<5% solar}. There are almost no X-ray observations of such low abundance galaxies {3 in the Chandra archive}. These are the most metal-deficient galaxies known, and a logical place to find ULX if they favor metal-poor systems. We plan to test recent population synthesis models which predict that ULX should be very numerous in metal-poor galaxies. We will also test the hypothesis that ULX form in massive young star clusters, and ask for HST time to obtain the necessay imaging data.;

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