This article has an erratum: [erratum]
Volume 405, Number 2, July II 2003
|Page(s)||505 - 511|
|Published online||19 June 2003|
RX J0042.3+4115: A stellar mass black hole binary identified in M 31
The Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes, MK7 6BT, UK
2 The Department of Physics and Astronomy, The University of Leicester, Leicester, LE1 7RH, UK
3 Los Alamos National Laboratory, PO Box 1663, Mail Stop D436, NIS-2, Los Alamos, MN 87545, USA
Corresponding author: R. Barnard, firstname.lastname@example.org
Accepted: 17 April 2003
Four XMM-Newton X-ray observations of the central region of the Andromeda Galaxy (M 31) have revealed an X-ray source that varies in luminosity over ~ erg s-1 between observations and also displays significant variability over time-scales of a few hundred seconds. The power density spectra of lightcurves obtained in the 0.3–10 keV energy band from the three EPIC instruments on board XMM-Newton are typical of disc-accreting X-ray binaries at low accretion rates, observed in neutron star binaries only at much lower luminosities (~ 1036 erg s-1). However X-ray binaries with massive black hole primaries have exhibited such power spectra for luminosities >1038 erg s-1. We discuss alternative possibilities where RX J0042.3+4115 may be a background AGN or foreground object in the field of view, but conclude that it is located within M 31 and hence use the observed power spectra and X-ray luminosities to identify the primary as a black hole candidate.
Key words: X-rays: general / galaxies: individual: M 31 / X-rays: binaries / black hole physics
© ESO, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.