2014A&A...565L..10R


C.D.S. - SIMBAD4 rel 1.7 - 2019.07.19CEST08:53:55

2014A&A...565L..10R - Astronomy and Astrophysics, volume 565, L10-10 (2014/5-1)

On binary-driven hypernovae and their nested late X-ray emission.

RUFFINI R., MUCCINO M., BIANCO C.L., ENDERLI M., IZZO L., KOVACEVIC M., PENACCHIONI A.V., PISANI G.B., RUEDA J.A. and WANG Y.

Abstract (from CDS):

The induced gravitational collapse (IGC) paradigm addresses the very energetic (1052-1054erg) long gamma-ray bursts (GRBs) associated to supernovae (SNe). Unlike the traditional ``collapsar'' model, an evolved FeCO core with a companion neutron star (NS) in a tight binary system is considered as the progenitor. This special class of sources, here named ``binary-driven hypernovae'' (BdHNe), presents a composite sequence composed of four different episodes with precise spectral and luminosity features. We first compare and contrast the steep decay, the plateau, and the power-law decay of the X-ray luminosities of three selected BdHNe (GRB 060729, GRB 061121, and GRB 130427A). Second, to explain the different sizes and Lorentz factors of the emitting regions of the four episodes, for definiteness, we use the most complete set of data of GRB 090618. Finally, we show the possible role of r-process, which originates in the binary system of the progenitor. We compare and contrast the late X-ray luminosity of the above three BdHNe. We examine correlations between the time at the starting point of the constant late power-law decay t*a, the average prompt luminosity <Liso>, and the luminosity at the end of the plateau La. We analyze a thermal emission (∼0.97-0.29keV), observed during the X-ray steep decay phase of GRB 090618. The late X-ray luminosities of the three BdHNe, in the rest-frame energy band 0.3-10keV, show a precisely constrained ``nested'' structure. In a space-time diagram, we illustrate the different sizes and Lorentz factors of the emitting regions of the three episodes. For GRB 090618, we infer an initial dimension of the thermal emitter of ∼7x1012cm, expanding at Γ≃2. We find tighter correlations than the Dainotti-Willingale ones. We confirm a constant slope power-law behavior for the late X-ray luminosity in the source rest frame, which may lead to a new distance indicator for BdHNe. These results, as well as the emitter size and Lorentz factor, appear to be inconsistent with the traditional afterglow model based on synchrotron emission from an ultra-relativistic (Γ∼102-103) collimated jet outflow. We argue, instead, for the possible role of r-process, originating in the binary system, to power the mildly relativistic X-ray source.

Abstract Copyright:

Journal keyword(s): supernovae: general - binaries: general - gamma-ray burst: general - black hole physics - stars: neutron - reactions nuclear, nucleosynthesis, abundances

CDS comments: Paragraph. 1 GRB 110907B is a misprint for GRB 110709B

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 SN 2009nz SN* 02 26 19.87 -18 57 08.6           SN.? 217 1
2 GRB 061007 gB 03 05 19.510 -50 30 02.50 14.28 14.40 12.95     ~ 262 1
3 SN 2006aj SN* 03 21 39.670 +16 52 02.27 17.96 19.11 17.40     SN.Ic-bl 800 1
4 GRB 060729 gB 06 21 31.850 -62 22 12.69           ~ 238 0
5 GRB 061121 gB 09 48 54.570 -13 11 42.68 17.19 17.71 17.02     ~ 274 0
6 GRB 111228A gB 10 00 16.04 +18 17 52.2           ~ 124 0
7 GRB 110709B gB 10 58 37.2 -23 27 18           ~ 66 0
8 SN 2013cq SN* 11 32 32.84 +27 41 56.2           SNIc 345 1
9 GRB 080319B gB 14 31 41.04 +36 18 09.2           ~ 414 0
10 GRB 970828 gB 18 08 31.6 +59 18 51           ~ 334 1
11 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1605 2
12 GRB 090618 gB 19 36 01.80 +78 21 07.1           ~ 259 0
13 GRB 101023A gB 21 11 51.26 -65 23 17.7           ~ 55 0

    Equat.    Gal    SGal    Ecl

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2019.07.19-08:53:55

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