2006ApJ...646..407R


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST11:53:44

2006ApJ...646..407R - Astrophys. J., 646, 407-419 (2006/July-3)

The rates of type I X-ray bursts from transients observed with RXTE: evidence for black hole event horizons.

REMILLARD R.A., LIN D., COOPER R.L. and NARAYAN R.

Abstract (from CDS):

We measure the rates of type I X-ray bursts from a likely flux-limited sample of 37 nonpulsing Galactic transients observed with RXTE during 1996-2004. These sources are well categorized in the literature as either neutron star systems or black hole candidates. Our goals are to test the burst model for neutron stars and to investigate whether black holes have event horizons. Target selection is one of several differences between the present study and the investigation of the event horizon question by Tournear and coworkers. Burst rates are measured as a function of bolometric luminosity, and the results are compared with augmented versions of the burst model developed by Narayan & Heyl. For a given mass, we consider a range in both the radius and the temperature at the boundary below the accretion layer. We find 135 spectrally confirmed type I bursts in 3.7 Ms of PCA exposures for the neutron star group (13 sources), and the burst rate function is generally consistent with the model predictions. However, for the black hole groups (18 sources), there are no confirmed type I bursts in 6.5 Ms of exposure, and the upper limits in the burst function are inconsistent with the model predictions for heavy compact objects with a solid surface. The consistency probability is ∼2x10–7 for dynamical black hole binaries, falling to 3x10–13 with the added exposures of black hole candidates. Furthermore, there are systematic spectral differences between the neutron star and black hole groups, supporting the presumption that physical differences underly the classifications in our sample. These results provide indirect evidence that black holes do have event horizons.

Abstract Copyright:

Journal keyword(s): Black Hole Physics - Relativity - Stars: Neutron - X-Rays: Bursts - X-Rays: Stars

Simbad objects: 43

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Number of rows : 43

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* CI Cam HXB 04 19 42.1353986687 +55 59 57.708146070 12.13 12.41 11.77 10.79 9.99 B0/2I[e] 227 0
2 1RXS J092056.5-315857 X 09 20 56.5 -31 58 57           ~ 1 0
3 V* KV UMa HXB 11 18 10.7922353051 +48 02 12.319175505     12.25     K5V-M1V 737 0
4 V* BW Cir HXB 13 58 09.700 -64 44 05.80 17.90 18.00 16.9     ~ 202 1
5 SAX J1428.6-5422 X 14 28.6 -54 22           ~ 3 0
6 V* IL Lup HXB 15 47 08.2766679321 -47 40 10.284971214     11.96     ~ 426 1
7 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1062 0
8 V* QX Nor LXB 16 12 43.0 -52 25 23           ~ 849 1
9 X Nor X-1 LXB 16 34 01.610 -47 23 34.80           ~ 438 0
10 [GHJ2008] 3 HXB 16 50 00.980 -49 57 43.60     11.89     K4V 358 0
11 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1751 1
12 MXB 1658-298 LXB 17 02 06.54 -29 56 44.1 18.35 18.75 18.3     ~ 336 0
13 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1826 0
14 RX J1709.5-2639 LXB 17 09 34 -26 39.9           ~ 108 0
15 SAX J1711.6-3808 XB* 17 11 37.1 -38 07 06           ~ 37 0
16 4U 1711-34 LXB 17 14 19.78 -34 02 47.3           ~ 43 0
17 1RXH J171556.7-385150 HXB 17 15 56.7 -38 51 50           ~ 21 0
18 V* V1228 Sco LXB 17 19 58.990 -31 45 01.11           ~ 109 1
19 INTREF 776 LXB 17 23 38.7 -37 39 42           ~ 27 0
20 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 399 0
21 [KRL2007b] 258 LXB 17 39 53.95 -28 29 46.8           ~ 84 0
22 V* V2606 Oph CV* 17 42 40.030 -27 44 52.70     23.2     ~ 119 0
23 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 631 0
24 [KRL2007b] 275 LXB 17 47 02.60 -28 52 58.9     14.20     ~ 159 0
25 AX J1748.0-2829 LXB 17 48 05.060 -28 28 25.80     13.60     ~ 175 0
26 NAME TER 5 X-1 LXB 17 48 05.196 -24 46 47.40           ~ 199 1
27 [KRL2007b] 281 LXB 17 48 13.148 -36 07 57.02     20.9     ~ 89 0
28 4U 1745-203 LXB 17 48 53.40 -20 21 43.0           ~ 81 1
29 RX J1749.8-3312 LXB 17 49 48.940 -33 12 11.60           ~ 49 0
30 SAX J1750.8-2900 LXB 17 50 24.42 -29 02 15.4           ~ 131 0
31 INTREF 866 LXB 17 55 28.6 -32 28 39     10.79     ~ 40 0
32 SAX J1805.5-2031 X 18 05 34 -20 30.8           ~ 12 0
33 2S 1803-245 LXB 18 06 50.72 -24 35 28.6           ~ 71 0
34 V* V4722 Sgr LXB 18 10 44.47 -26 09 01.2   21.5       ~ 83 0
35 V* V4641 Sgr HXB 18 19 21.6342721789 -25 24 25.849323550     13.654   13.092 B9III 407 1
36 XTE J1837+037 X 18 37 +03.7           ~ 5 0
37 INTREF 948 LXB 18 56 42.920 +05 18 34.30           ~ 43 0
38 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 326 0
39 XTE J1901+031 X 19 01 +03.1           ~ 1 0
40 [KRL2007b] 353 HXB 19 08 53.080 +09 23 04.84     15.80     ~ 88 0
41 X Aql X-1 LXB 19 11 16.0572031521 +00 35 05.876658556           ~ 1040 1
42 INTREF 1012 LXB 20 12 37.7593213138 +38 11 00.771841820     21.33     ~ 62 0
43 V* LZ Aqr LXB 21 23 14.54 -05 47 52.9 15.90 16.78 16.8     ~ 144 0

    Equat.    Gal    SGal    Ecl

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2021.04.18-11:53:44

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