A candidate "intermediate-mass" black hole in the dwarf starburst galaxy He 2-10

Details A candidate "intermediate-mass" black hole in the dwarf starburst galaxy He 2-10 A candidate "intermediate-mass" black hole in the dwarf starburst galaxy He 2-10

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..112h&link_type=abstract

XMM-Newton Proposal ID #06728001

Computer Science

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Henize 2-10

Scientific paper

A candidate accreting black hole (BH) with M_BH ~ 10^6 M_sun has recently been identified in the local dwarf starburst galaxy Henize 2-10. This discovery raises the possibility of an entirely new environment for such black holes and has important implications for the overall population of massive BHs and the processes by which "seed" BHs formed and grew in the early Universe. The hard X-ray nucleus of He 2-10 was detected with Chandra in 2001, but its variability properties are completely unknown and its hard X-ray spectrum is not well characterized. We propose a 25 ks XMM exposure to search for variability and for an improved measurement of the X-ray spectrum, in order to test the hypothesis that it is an accreting BH and place some constraints on its mass.

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