Constraining the black hole mass in M82 X-1 with VLBI

Details Constraining the black hole mass in M82 X-1 with VLBI Constraining the black hole mass in M82 X-1 with VLBI

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..924..697p&link_type=abstract

THE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS. AIP Conference Proceedings, Volume 924, pp. 697-701

Computer Science

Black Holes, X-Ray Sources, X-Ray Bursts, Interferometry

Scientific paper

We show that intermediate-mass black holes (IMBH), if exist, must be detectable by present day radio interferometric techniques in nearby galaxies. The European VLBI Network (EVN) is especially well suited for this task. We present sensitive, large field of view EVN observations of the most active ultra-luminous X-ray (ULX) source, M82 X-1. There is only one object detected in the error box of the X-ray source, which is likely a supernova remnant and probably unrelated to the ULX. This non-detection places an upper limit on the black hole mass (as a function of X-ray luminosity). Our data indicate that M82 X-1 is unlikely to be powered by a black hole of ~1000 Msolar. This result indicates that the X-rays are beamed, but this must take place in the accretion environment rather than in a relativistic jet.

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