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dc.contributor.authorBarnard, R.-
dc.contributor.authorOsborne, J. P.-
dc.contributor.authorKolb, U.-
dc.contributor.authorHaswell, C. A.-
dc.identifier.citationAIP Conference Proceedings, 2005, 797, pp. 219-224en
dc.description.abstractWe present a new technique for identifying stellar mass black holes in low mass X-ray binaries (LMXBs), and apply it to XMM-Newton observations of M31. We examine X-ray time series variability seeking power density spectra (PDS) typical of LMXBs accreting at a low accretion rate (which we refer to as Type A PDS); these are very similar for black hole and neutron star LMXBs. Galactic neutron star LMXBs exhibit Type A PDS at low luminosities (10 36-1037 erg/s) while black hole LMXBs can exhibit them at luminosities >1038 erg s-1. We propose that Type A PDS are confined to luminosities below a critical fraction of the Eddington limit, lc that is constant for all LMXBs; we have examined a sample of black hole and neutron star LMXBs and find they are all consistent with lc ∼ 0.1 in the 0.3-10 keV band. We present luminosity and PDS data from 167 observations of X-ray binaries in M31 that provide strong support for our hypothesis. Since the theoretical maximum mass for a neutron star is 3.1 M ⊙, we therefore assert that any LMXB that exhibits a Type A PDS at a 0.3-10 keV luminosity greater than 4×1037 erg s -1 is likely to contain a black hole primary.en
dc.description.sponsorshipThis work was funded by PPARC.en
dc.publisherAIP Publishingen
dc.rightsCreative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: Archived with reference to SHERPA/RoMEO and publisher website.en
dc.subjectX-rays: generalen
dc.subjectX-rays: binariesen
dc.subjectGalaxies: individual: M31en
dc.subjectblack hole physicsen
dc.subjectMethods: data analysisen
dc.titleBlack hole hunting in the Andromeda Galaxyen
dc.typeConference Paperen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERINGen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomyen
Appears in Collections:Conference Papers & Presentations, Dept. of Physics and Astronomy

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