2004A&A...423..147B


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET23:46:19

2004A&A...423..147B - Astronomy and Astrophysics, volume 423, 147-153 (2004/8-3)

Identifying a black hole X-ray transient in M 31 with XMM-Newton and Chandra.

BARNARD R., KOLB U. and OSBORNE J.P.

Abstract (from CDS):

Stochastic variability in two out of four XMM-Newton observations of XMMU J004303+4115 along with its power spectra and X-ray luminosities suggest a low-mass X-ray binary (LMXB) with a black hole primary. However, Chandra observations resolve the object into two point sources. We use data from 35 Chandra observations to analyse the contributions of each source, and attribute the variability to CXOM31 J004303.2+411528 (known as r2-3), which varies in intensity by a factor of ∼100 between observations. We assume that the power density spectra of LMXBs are governed by the luminosity, and that the transition between types of power density spectra occurs at some critical luminosity in Eddington units, lc, that applies to all LMXBs. We use results from these XMM-Newton observations and past results from the available literature to estimate this transition luminosity, and find that all results are consistent with lc∼0.1 in the 0.3-10keV band. CXOM31 J004303.2+411528 exhibits a low accretion rate power density spectrum at a 0.3-10keV luminosity of 5.3±0.6x1037erg/s. Known stellar mass black holes have masses of 4-15M; hence our observations of CXOM31 J004303.2+411528 are consistent with lc∼0.1 if it has a black hole primary.

Abstract Copyright:

Journal keyword(s): X-rays: general - galaxies: formation - X-rays: binaries - black hole physics - accretion, accretion disks

Errata: erratum vol. 469, p. 873 (2007)

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10588 1
2 2MASS J00430292+4115225 GlC 00 43 02.921 +41 15 22.51 18.34 18.440 16.99 16.060 15.94 ~ 55 1
3 [BGM2013] BHC 27 XB* 00 43 03.241 +41 15 28.00           ~ 10 1
4 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1705 0
5 4U 1705-44 LXB 17 08 54.470 -44 06 07.35           ~ 350 0
6 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 891 1
7 V* V404 Cyg HXB 20 24 03.820 +33 52 01.90 14.50 14.20 12.7     K0IV 1054 0

    Equat.    Gal    SGal    Ecl

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2019.11.21-23:46:19

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