2010MNRAS.401.1465C


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.17CEST04:00:49

2010MNRAS.401.1465C - Mon. Not. R. Astron. Soc., 401, 1465-1474 (2010/January-3)

Towards the properties of long gamma-ray burst progenitors with Swift data.

CUI X.-H., LIANG E.-W., LV H.-J., ZHANG B.-B. and XU R.-X.

Abstract (from CDS):

We investigate the properties of both the prompt and X-ray afterglows of gamma-ray bursts (GRBs) in the burst frame with a sample of 33 Swift GRBs. Assuming that the steep decay segment in the canonical X-ray afterglow light curves is due to the curvature effect, we fit the light curves with a broken power law to derive the zero time of the last emission epoch of the prompt emission (t1) and the beginning as well as the end time of the shallow decay segment (t2 and t3). We show that both the isotropic peak gamma-ray luminosity (Lpeak,γ) and gamma-ray energy (Eiso,γ) are correlated with the isotropic X-ray energy (Eiso,X) of the shallow decay phase and the isotropic X-ray luminosity at). We infer the properties of the progenitor stars based on a model proposed by Kumar et al. who suggested that both the prompt gamma-rays and the X-ray afterglows are due to the accretions of different layers of materials of the GRB progenitor star by a central black hole (BH). We find that most of the derived masses of the core layers are Mc= 0.1 ∼ 5M, and their average accretion rates in the prompt gamma-ray phase are, with a radius of rc= 108 ∼ 1010 cm. The rotation parameter is correlated with the burst duration, being consistent with the expectation of collapsar models. The estimated radii and the masses of the fall-back materials for the envelope layers are re= 1010 ∼ 1012 cm and Me = 10–3 ∼ 1M, respectively. The average accretion rates in the shallow decay phase are correlated with those in the prompt gamma-ray phase, but they are much lower, i.e.. The re values are smaller than the photospheric radii of Wolf-Rayet stars. In our calculation, we assume a uniform mass of the central BH (MBH= 10M). Therefore, we may compare our results with simulation results. It is interesting that the assembled mass density profile for the bursts in our sample is well consistent with the simulation for a pre-supernova star with mass M = 25M.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): radiation mechanisms: non-thermal - gamma-rays: bursts

Simbad objects: 33

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Number of rows : 33

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 GRB 070110 gB 00 03 39.270 -52 58 27.00 21.8 21.9 21.2     ~ 178 0
2 GRB 060708 gB 00 31 13.850 -33 45 32.40 19.07 19.79 17.37     ~ 87 0
3 GRB 050908 gB 01 21 50.750 -12 57 17.20           ~ 160 0
4 GRB 080707 gB 02 10 28.48 +33 06 35.1           ~ 64 0
5 GRB 070721B gB 02 12 32.98 -02 11 39.8           ~ 104 0
6 GRB 060906 gB 02 43 00.900 +30 21 42.12     19.84     ~ 122 0
7 GRB 070318 gB 03 13 56.830 -42 56 46.30 18.27 16.23 15.49     ~ 147 0
8 GRB 060210 gB 03 50 57.370 +27 01 34.40   20.27       ~ 231 0
9 GRB 060729 gB 06 21 31.850 -62 22 12.69           ~ 260 0
10 GRB 051016B gB 08 48 27.810 +13 39 20.00 20.45         ~ 125 0
11 GRB 060108 gB 09 48 01.980 +31 55 08.59           ~ 95 0
12 GRB 061121 gB 09 48 54.570 -13 11 42.68 17.19 17.71 17.02     ~ 294 0
13 GRB 070306 gB 09 52 23.220 +10 28 55.20           ~ 182 1
14 GRB 080430 gB 11 01 14.63 +51 41 07.8           ~ 129 0
15 GRB 050416 gB 12 33 54.600 +21 03 26.69     19.12     ~ 255 1
16 GRB 080607 gB 12 59 47.14 +15 55 09.6           ~ 213 0
17 GRB 080310 gB 14 40 13.89 -00 10 30.4           ~ 167 0
18 GRB 060814 gB 14 45 21.480 +20 35 11.80           ~ 191 0
19 GRB 060714 gB 15 11 26.450 -06 33 58.30   20.21 18.54     ~ 172 0
20 GRB 060526 gB 15 31 18.360 +00 17 04.90   18.31 17.16     ~ 242 0
21 GRB 060418 gB 15 45 42.600 -03 38 20.00 15.73 16.19 14.98     ~ 330 0
22 GRB 060510B gB 15 56 29.200 +78 34 12.00           ~ 133 0
23 GRB 060502A gB 16 03 42.480 +66 36 02.49     18.65     ~ 120 0
24 GRB 081008 gB 18 39 52.40 -57 25 58.8           ~ 165 0
25 GRB 080905B gB 20 06 57.90 -62 33 46.4           ~ 85 0
26 GRB 060605 gB 21 28 37.320 -06 03 31.30   20.12 16.53     ~ 172 0
27 GRB 060522 gB 21 31 44.850 +02 53 10.80           ~ 117 0
28 GRB 060607 gB 21 58 50.400 -22 29 46.70 18.49 16.67 15.09     ~ 266 0
29 GRB 051109A gB 22 01 15.320 +40 49 23.70   20.09 20.14     ~ 153 0
30 SN 2008hw SN* 22 39 50.39 -40 08 49.1           SNIc 150 1
31 GRB 071021 gB 22 42 34.34 +23 43 05.4           ~ 85 0
32 GRB 050803 gB 23 22 37.910 +05 47 09.00           ~ 106 0
33 GRB 060707 gB 23 48 19.000 -17 54 17.00     19.79     ~ 142 0

    Equat.    Gal    SGal    Ecl

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2021.05.17-04:00:49

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