2013ApJ...776L..36M


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.31CET10:52:36

2013ApJ...776L..36M - Astrophys. J., 776, L36 (2013/October-3)

Revisiting putative cool accretion disks in ultraluminous X-ray sources.

MILLER J.M., WALTON D.J., KING A.L., REYNOLDS M.T., FABIAN A.C., MILLER M.C. and REIS R.C.

Abstract (from CDS):

Soft, potentially thermal spectral components observed in some ultra-luminous X-ray sources (ULXs) can be fit with models for emission from cool, optically thick accretion disks. If that description is correct, the low temperatures that are observed imply accretion onto "intermediate-mass" black holes. Subsequent work has found that these components may follow an inverse relationship between luminosity and temperature, implying a non-blackbody origin for this emission. We have re-analyzed numerous XMM-Newton spectra of extreme ULXs. Crucially, observations wherein the source fell on a chip gap were excluded owing to their uncertain flux calibration, and the neutral column density along the line of sight to a given source was jointly determined by multiple spectra. The luminosity of the soft component is found to be positively correlated with temperature, and to be broadly consistent with L∝T 4 in the measured band pass, as per blackbody emission from a standard thin disk. These results are nominally consistent with accretion onto black holes with masses above the range currently known in Galactic X-ray binaries, though there are important caveats. Emission from inhomogeneous or super-Eddington disks may also be consistent with the data.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - black hole physics

Simbad objects: 16

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Number of rows : 16

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 NGC 1313 G 03 18 16.046 -66 29 53.74   10.06 10.0 9.40 10.4 ~ 614 2
2 RX J031820.3-662911 UX? 03 18 20.00 -66 29 10.9           ~ 171 1
3 2E 756 ULX 03 18 22.00 -66 36 04.3   23.5 23.6     O9.5 192 3
4 [SST2011] J034555.61+680455.3 ULX 03 45 55.612 +68 04 55.29           ~ 141 1
5 X LMC X-3 HXB 05 38 56.6325045489 -64 05 03.321118015   17 17.2     B2.5Ve 632 0
6 [SST2011] J081929.00+704219.3 ULX 08 19 28.99 +70 42 19.4           ~ 158 2
7 RX J0957.9+6903 ULX 09 57 53.290 +69 03 48.20           ~ 200 4
8 [FK2005] 23 ULX 13 29 38.62 +58 25 05.6           ~ 109 2
9 [FK2005] 25 ULX 14 03 19.63 -41 22 58.7           ~ 197 0
10 [GHJ2008] 3 HXB 16 50 00.980 -49 57 43.60           K4V 349 0
11 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1785 0
12 XTE J1752-223 LXB 17 52 15.090 -22 20 32.36           ~ 161 0
13 [KRL2007b] 312 LXB 18 17 43.537 -33 01 07.80           ~ 140 0
14 Granat 1915+105 LXB 19 15 11.54938 +10 56 44.7585           ~ 2310 0
15 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3948 0
16 V* V1341 Cyg LXB 21 44 41.1544523872 +38 19 17.065856122 15.00 15.13 14.68 15.00   A9III 1074 1

    Equat.    Gal    SGal    Ecl

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2020.10.31-10:52:36

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