A compact pulsar wind nebula model of the γ-ray-loud binary LS I+61°303

被引：52

作者：

Zdziarski, Andrzej A. ^{[1
]}

Neronov, Andrii ^{[2
,3
]}

Chernyakova, Maria ^{[4
]}

机构：

[1] Ctr Astron M Kopernika, PL-00716 Warsaw, Poland

[2] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland

[3] Univ Geneva, Observ Geneva, CH-1290 Sauverny, Switzerland

[4] Dublin Inst Adv Studies, Dublin 2, Ireland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2010年 / 403卷 / 04期

关键词：

radiation mechanisms: non-thermal; stars: individual: LS I+61 degrees 303; gammarays: theory; X-rays: binaries; X-rays: individual: LS I+61 degrees 303; XMM-NEWTON OBSERVATIONS; X-RAY; H-ALPHA; MASS-LOSS; INFRARED-SPECTRUM; NEUTRON-STAR; LIGHT-CURVE; CYGNUS X-1; I+61 303; RADIO;

D O I：

10.1111/j.1365-2966.2010.16263.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study a model of LS I +61 degrees 303 in which its radio to TeV emission is due to interaction of a relativistic wind from a young pulsar with the wind from its companion Be star. The detailed structure of the stellar wind plays a critical role in explaining the properties of the system. We assume the fast polar wind is clumpy, which is typical for radiatively driven winds. The clumpiness and some plasma instabilities cause the two winds to mix. The relativistic electrons from the pulsar wind are retained in the moving clumps by inhomogeneities of the magnetic field, which explains the X-ray variability observed on time-scales much shorter than the orbital period. We calculate detailed inhomogeneous spectral models reproducing the average broad-band spectrum from radio to TeV. Given the uncertainties on the magnetic field within the wind and the form of the distribution of relativistic electrons, the X-ray spectrum could be dominated by either Compton or synchrotron emission. The recent Fermi observations constrain the high-energy cut-off in the electron distribution to be at the Lorentz factor of 2 x 10(4) or similar to 10(8) in the former and latter model, respectively. We provide formulae comparing the losses of the relativistic electrons due to Compton, synchrotron and Coulomb processes versus the distance from the Be star. We calculate the optical depth of the wind to free-free absorption, showing that it will suppress most of the radio emission within the orbit, including the pulsed signal of the rotating neutron star. We point out the importance of Compton and Coulomb heating of the stellar wind within and around the gamma-ray emitting region. Then, we find the most likely mechanism explaining the orbital modulation at TeV energies is anisotropy of emission, with relativistic electrons accelerated along the surface of equal ram pressure of the two winds. Pair absorption of the TeV emission suppresses one of the two maxima expected in an orbit.

引用

页码：1873 / 1886

页数：14

共 105 条

[1] Modulated High-Energy Gamma-Ray Emission from the Microquasar Cygnus X-3 [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Cecchi, C. ;

Celik, Oe ;

Chaty, S. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Corbel, S. ;

Corbet, R. ;

Dermer, C. D. ;

de Palma, F. ;

Digel, S. W. ;

do Couto e Silva, E. ;

Drell, P. S. ;

Dubois, R. ;

Dubus, G. ;

Dumora, D. ;

Farnier, C. ;

Favuzzi, C. ;

Fegan, S. J. ;

Focke, W. B. ;

Fortin, P. .

SCIENCE, 2009, 326 (5959) :1512-1516

[2] FERMI LAT OBSERVATIONS OF LS I+61°303: FIRST DETECTION OF AN ORBITAL MODULATION IN GeV GAMMA RAYS [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Blandford, R. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Bregeon, J. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Cavazzuti, E. ;

Cecchi, C. ;

Celik, Oe. ;

Charles, E. ;

Chaty, S. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Corbel, S. ;

Corbet, R. ;

Cutini, S. ;

Dermer, C. D. ;

de Angelis, A. ;

de Luca, A. ;

de Palma, F. ;

Digel, S. W. ;

Dormody, M. ;

do Couto e Silva, E. ;

Drell, P. S. .

ASTROPHYSICAL JOURNAL LETTERS, 2009, 701 (02) :L123-L128

[3] Veritas observations of the γ-ray binary LS I+61 303 [J].

Acciari, V. A. ;

Beilicke, M. ;

Blaylock, G. ;

Bradbury, S. M. ;

Buckley, J. H. ;

Bugaev, V. ;

Butt, Y. ;

Byrum, K. L. ;

Celik, O. ;

Cesarini, A. ;

Ciupik, L. ;

Chow, Y. C. K. ;

Cogan, P. ;

Colin, P. ;

Cui, W. ;

Daniel, M. K. ;

Duke, C. ;

Ergin, T. ;

Falcone, A. D. ;

Fegan, S. J. ;

Finley, J. P. ;

Fortin, P. ;

Fortson, L. F. ;

Gall, D. ;

Gibbs, K. ;

Gillanders, G. H. ;

Grube, J. ;

Guenette, R. ;

Hanna, D. ;

Hays, E. ;

Holder, J. ;

Horan, D. ;

Hughes, S. B. ;

Hui, C. M. ;

Humensky, T. B. ;

Kaaret, P. ;

Kieda, D. B. ;

Kildea, J. ;

Konopelko, A. ;

Krawczynski, H. ;

Krennrich, F. ;

Lang, M. J. ;

LeBohec, S. ;

Lee, K. ;

Maier, G. ;

McCann, A. ;

McCutcheon, M. ;

Millis, J. ;

Moriarty, P. ;

Mukherjee, R. .

ASTROPHYSICAL JOURNAL, 2008, 679 (02) :1427-1432

[4] Very high energy gamma-ray radiation from the stellar mass black hole binary Cygnus X-1 [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, 665 (01) :L51-L54

[5] Variable very-high-energy gamma-ray emission from the microquasar LS I +61 303 [J].

Albert, J. ;

Aliu, E. ;

Anderhub, H. ;

Antoranz, P. ;

Armada, A. ;

Asensio, M. ;

Baixeras, C. ;

Barrio, J. A. ;

Bartelt, M. ;

Bartko, H. ;

Bastieri, D. ;

Bavikadi, S. R. ;

Bednarek, W. ;

Berger, K. ;

Bigongiari, C. ;

Biland, A. ;

Bisesi, E. ;

Bock, R. K. ;

Bordas, P. ;

Bosch-Ramon, V. ;

Bretz, T. ;

Britvitch, I. ;

Camara, M. ;

Carmona, E. ;

Chilingarian, A. ;

Ciprini, S. ;

Coarasa, J. A. ;

Commichau, S. ;

Contreras, J. L. ;

Cortina, J. ;

Curtef, V. ;

Danielyan, V. ;

Dazzi, F. ;

De Angelis, A. ;

Reyes, R. de los ;

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. ;

Garczarczyk, M. .

SCIENCE, 2006, 312 (5781) :1771-1773

[6]

[Anonymous], MNRAS

[7] EXOSAT OBSERVATIONS OF THE X-RAY SOURCE 2S-0114+65 [J].

APPARAO, KMV ;

BISHT, P ;

SINGH, KP .

ASTROPHYSICAL JOURNAL, 1991, 371 (02) :772-775

[8] X-RAY-EMISSION FROM BE STAR X-RAY BINARIES [J].

APPARAO, KMV .

SPACE SCIENCE REVIEWS, 1994, 69 (3-4) :255-329

[9] THE ORBITS OF THE γ-RAY BINARIES LS I+61 303 AND LS 5039 [J].

Aragona, Christina ;

McSwain, M. Virginia ;

Grundstrom, Erika D. ;

Marsh, Amber N. ;

Roettenbacher, Rachael M. ;

Hessler, Katelyn M. ;

Boyajian, Tabetha S. ;

Ray, Paul S. .

ASTROPHYSICAL JOURNAL, 2009, 698 (01) :514-518

[10] DYNAMICS OF BINARY-DISK INTERACTION .1. RESONANCES AND DISK GAP SIZES [J].

ARTYMOWICZ, P ;

LUBOW, SH .

ASTROPHYSICAL JOURNAL, 1994, 421 (02) :651-667

← 1 2 3 4 5 6 7 8 9 10 →