Properties of GRB light curves from magnetic reconnection

被引：50

作者：

Beniamini, Paz ^{[1
]}

Granot, Jonathan ^{[2
]}

机构：

[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[2] Open Univ Israel, Dept Nat Sci, 1 Univ Rd,POB 808, IL-4353701 Raanana, Israel

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 459卷 / 04期

关键词：

magnetic reconnection; radiation mechanisms: non-thermal; gamma-rays: general; GAMMA-RAY BURST; X-RAY; AFTERGLOW EMISSION; FERMI OBSERVATIONS; RELATIVISTIC JETS; STOCHASTIC ACCELERATION; LUMINOSITY CORRELATION; PARTICLE-ACCELERATION; STELLAR-EXPLOSIONS; SPECTRAL CATALOG;

D O I：

10.1093/mnras/stw895

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The energy dissipation mechanism within gamma-ray burst (GRB) outflows, driving their extremely luminous prompt gamma-ray emission is still uncertain. The leading candidates are internal shocks and magnetic reconnection. While the emission from internal shocks has been extensively studied, that from reconnection still has few quantitative predictions. We study the expected prompt-GRB emission from magnetic reconnection and compare its temporal and spectral properties to observations. The main difference from internal shocks is that for reconnection one expects relativistic bulk motions with Lorentz factors I"(')a parts per thousand(3) a few in the jet's bulk frame. We consider such motions of the emitting material in two antiparallel directions (e.g. of the reconnecting magnetic-field lines) within an ultrarelativistic (with I" a parts per thousand << 1) thin spherical reconnection layer. The emission's relativistic beaming in the jet's frame greatly affects the light curves. For emission at radii R-0 < R < R-0 + Delta R (with I" = const), the observed pulse width is Delta T similar to (R-0/2cI"(2)) max (1/I"('), Delta R/R-0), i.e. up to similar to I"(') times shorter than for isotropic emission in the jet's frame. We consider two possible magnetic reconnection modes: a quasi-steady state with continuous plasma flow into and out of the reconnection layer, and sporadic reconnection in relativistic turbulence that produces relativistic plasmoids. Both of these modes can account for many observed prompt-GRB properties: variability, pulse asymmetry, the very rapid declines at their end and pulse evolutions that are either hard to soft (for I"(') a parts per thousand(2) 2) or intensity tracking (for I"(') > 2). However, the relativistic turbulence mode is more likely to be relevant for the prompt sub-MeV emission and can naturally account also for the peak luminosity - peak frequency correlation.

引用

页码：3635 / 3658

页数：24

共 107 条

[1] FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 080825C [J].

Abdo, A. A. ;

Ackermann, M. ;

Asano, K. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Band, D. L. ;

Barbiellini, G. ;

Bastieri, D. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Bhat, P. N. ;

Bissaldi, E. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Bouvier, A. ;

Bregeon, J. ;

Brez, A. ;

Briggs, M. S. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Cecchi, C. ;

Chaplin, V. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Connaughton, V. ;

Conrad, J. ;

Cutini, S. ;

Dermer, C. D. ;

de Angelis, A. ;

de Palma, F. ;

Digel, S. W. ;

do Couto e Silva, E. ;

Drell, P. S. ;

Dubois, R. ;

Dumora, D. ;

Farnier, C. .

ASTROPHYSICAL JOURNAL, 2009, 707 (01) :580-592

[2] Fermi Observations of High-Energy Gamma-Ray Emission from GRB 080916C [J].

Abdo, A. A. ;

Ackermann, M. ;

Arimoto, M. ;

Asano, K. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Band, D. L. ;

Barbiellini, G. ;

Baring, M. G. ;

Bastieri, D. ;

Battelino, M. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellardi, F. ;

Bellazzini, R. ;

Berenji, B. ;

Bhat, P. N. ;

Bissaldi, E. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bogaert, G. ;

Bogart, J. R. ;

Bonamente, E. ;

Bonnell, J. ;

Borgland, A. W. ;

Bouvier, A. ;

Bregeon, J. ;

Brez, A. ;

Briggs, M. S. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Burrows, D. ;

Busetto, G. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Ceccanti, M. ;

Cecchi, C. ;

Celotti, A. ;

Charles, E. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. .

SCIENCE, 2009, 323 (5922) :1688-1693

[3] FERMI OBSERVATIONS OF GRB 090510: A SHORT-HARD GAMMA-RAY BURST WITH AN ADDITIONAL, HARD POWER-LAW COMPONENT FROM 10 keV TO GeV ENERGIES [J].

Ackermann, M. ;

Asano, K. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Baring, M. G. ;

Bastieri, D. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Bhat, P. N. ;

Bissaldi, E. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Bouvier, A. ;

Bregeon, J. ;

Brez, A. ;

Briggs, M. S. ;

Brigida, M. ;

Bruel, P. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caraveo, P. A. ;

Carrigan, S. ;

Casandjian, J. M. ;

Cecchi, C. ;

Celik, Oe. ;

Charles, E. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Connaughton, V. ;

Conrad, J. ;

Dermer, C. D. ;

de Palma, F. ;

Dingus, B. L. ;

do Couto e Silva, E. ;

Drell, P. S. ;

Dubois, R. ;

Dumora, D. ;

Farnier, C. ;

Favuzzi, C. ;

Fegan, S. J. ;

Finke, J. .

ASTROPHYSICAL JOURNAL, 2010, 716 (02) :1178-1190

[4] An exceptional very high energy gamma-ray flare of PKS 2155-304 [J].

Aharonian, F. ;

Akhperjanian, A. G. ;

Bazer-Bachi, A. R. ;

Behera, B. ;

Beilicke, M. ;

Benbow, W. ;

Berge, D. ;

Bernloehr, K. ;

Boisson, C. ;

Bolz, O. ;

Borrel, V. ;

Boutelier, T. ;

Braun, I. ;

Brion, E. ;

Brown, A. M. ;

Buehler, R. ;

Buesching, I. ;

Bulik, T. ;

Carrigan, S. ;

Chadwick, P. M. ;

Clapson, A. C. ;

Chounet, L.-M. ;

Coignet, G. ;

Cornils, R. ;

Costamante, L. ;

Degrange, B. ;

Dickinson, H. J. ;

Djannati-Atai, A. ;

Domainko, W. ;

Drury, L. O'C. ;

Dubus, G. ;

Dyks, J. ;

Egberts, K. ;

Emmanoulopoulos, D. ;

Espigat, P. ;

Farnier, C. ;

Feinstein, F. ;

Fiasson, A. ;

Foerster, A. ;

Fontaine, G. ;

Funk, Seb. ;

Funk, S. ;

Fuessling, M. ;

Gallant, Y. A. ;

Giebels, B. ;

Glicenstein, J. F. ;

Glueck, B. ;

Goret, P. ;

Hadjichristidis, C. ;

Hauser, D. .

ASTROPHYSICAL JOURNAL, 2007, 664 (02) :L71-L74

[5] Variable very high energy γ-ray emission from Markarian 501 [J].

Albert, J. ;

Aliu, E. ;

Anderhub, H. ;

Antoranz, P. ;

Armada, A. ;

Baixeras, C. ;

Barrio, J. A. ;

Bartko, H. ;

Bastieri, D. ;

Becker, J. K. ;

Bednarek, W. ;

Berger, K. ;

Bigongiari, C. ;

Biland, A. ;

Bock, R. K. ;

Bordas, P. ;

Bosch-Ramon, V. ;

Bretz, T. ;

Britvitch, I. ;

Camara, M. ;

Carmona, E. ;

Chilingarian, A. ;

Coarasa, J. A. ;

Commichau, S. ;

Contreras, J. L. ;

Cortina, J. ;

Costado, M. T. ;

Curtef, V. ;

Danielyan, V. ;

Dazzi, F. ;

De Angelis, A. ;

Delgado, C. ;

de los Reyes, R. ;

De Lotto, B. ;

Domingo-Santamaria, E. ;

Dorner, D. ;

Doro, M. ;

Errando, M. ;

Fagiolini, M. ;

Ferenc, D. ;

Fernandez, E. ;

Firpo, R. ;

Flix, J. ;

Fonseca, M. V. ;

Font, L. ;

Fuchs, M. ;

Galante, N. ;

Garcia-Lopez, R. J. ;

Garczarczyk, M. ;

Gaug, M. .

ASTROPHYSICAL JOURNAL, 2007, 669 (02) :862-883

[6]

[Anonymous], ASTROPH0004176

[7] Stochastic acceleration model of gamma-ray burst with decaying turbulence [J].

Asano, Katsuaki ;

Terasawa, Toshio .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 454 (02) :2242-2248

[8] Gamma-ray burst spectral evolution through cross-correlations of discriminator light curves [J].

Band, DL .

ASTROPHYSICAL JOURNAL, 1997, 486 (02) :928-937

[9] Stellar explosions powered by the Blandford-Znajek mechanism [J].

Barkov, Maxim V. ;

Komissarov, Serguei S. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 385 (01) :L28-L32

[10] Is gamma-ray burst afterglow emission intrinsically anisotropic? [J].

Beloborodov, A. M. ;

Daigne, F. ;

Mochkovitch, R. ;

Uhm, Z. L. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 410 (04) :2422-2427

← 1 2 3 4 5 6 7 8 9 10 →