On the origin of correlated X-ray/VHE emission from LS I+61 303

被引：22

作者：

Zabalza, V. ^{[1
]}

Paredes, J. M. ^{[1
]}

Bosch-Ramon, V. ^{[2
]}

机构：

[1] Univ Barcelona IEEC UB, ICC, Dept Astron & Meteorol, Barcelona 08028, Spain

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

来源：

ASTRONOMY & ASTROPHYSICS | 2011年 / 527卷

关键词：

stars: individual: LS I+61 303; stars: emission line; Be; X-rays: binaries; radiation mechanisms: non-thermal; GAMMA-RAY EMISSION; HIGH-ENERGY EMISSION; CHANDRA OBSERVATIONS; STELLAR WINDS; H-ALPHA; BINARY; MODEL; PULSAR; RADIATION; MODULATION;

D O I：

10.1051/0004-6361/201015373

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The MAGIC collaboration recently reported correlated X-ray and very high-energy (VHE) gamma-ray emission from the gamma-ray binary LS I +61 303 during similar to 60% of one orbit. These observations suggest that the emission in these two bands has its origin in a single particle population. Aims. We aim at improving our understanding of the source behaviour by explaining the simultaneous X-ray and VHE data through a radiation model. Methods. We use a model based on a one zone population of relativistic leptonic particles at the position of the compact object and assume dominant adiabatic losses. The adiabatic cooling time scale is inferred from the X-ray fluxes. Results. The model can reproduce the spectra and light curves in the X-ray and VHE bands. Adiabatic losses could be the key ingredient to explain the X-ray and partially the VHE light curves. From the best-fit result we obtain a magnetic field of B similar or equal to 0.2 G, a minimum luminosity budget of similar to 2 x 10(35) erg s(-1) and a relatively high acceleration efficiency. In addition, our results seem to confirm that the GeV emission detected by Fermi does not come from the same parent particle population as the X-ray and VHE emission. Moreover, the Fermi spectrum poses a constraint on the hardness of the particle spectrum at lower energies. In the context of our scenario, more sensitive observations would allow us to constrain the inclination angle, which could determine the nature of the compact object.

引用

页码：1 / 9

页数：9

共 58 条

[1] THE FIRST FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Baring, M. G. ;

Bastieri, D. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Bregeon, J. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Camilo, F. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Cecchi, C. ;

Celik, Oe ;

Charles, E. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cognard, I. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Corbet, R. ;

Cutini, S. ;

den Hartog, P. R. ;

Dermer, C. D. ;

de Angelis, A. ;

de Luca, A. ;

de Palma, F. ;

Digel, S. W. ;

Dormody, M. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2010, 187 (02) :460-494

[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] MULTIWAVELENGTH OBSERVATIONS OF LS I+61° 303 WITH VERITAS, SWIFT, AND RXTE [J].

Acciari, V. A. ;

Aliu, E. ;

Arlen, T. ;

Bautista, M. ;

Beilicke, M. ;

Benbow, W. ;

Boettcher, M. ;

Bradbury, S. M. ;

Bugaev, V. ;

Butt, Y. ;

Byrum, K. ;

Cannon, A. ;

Cesarini, A. ;

Chow, Y. C. ;

Ciupik, L. ;

Cogan, P. ;

Colin, P. ;

Cui, W. ;

Daniel, M. ;

Dickherber, R. ;

Ergin, T. ;

Falcone, A. ;

Fegan, S. J. ;

Finley, J. P. ;

Fortin, P. ;

Fortson, L. ;

Furniss, A. ;

Gall, D. ;

Gillanders, G. H. ;

Grube, J. ;

Guenette, R. ;

Gyuk, G. ;

Hanna, D. ;

Hays, E. ;

Holder, J. ;

Horan, D. ;

Hui, C. M. ;

Humensky, T. B. ;

Kaaret, P. ;

Karlsson, N. ;

Kieda, D. ;

Kildea, J. ;

Konopelko, A. ;

Krawczynski, H. ;

Krennrich, F. ;

Lang, M. J. ;

LeBohec, S. ;

Maier, G. ;

McCann, A. .

ASTROPHYSICAL JOURNAL, 2009, 700 (02) :1034-1041

[5]

AHARONIAN FA, 1981, ASTROPHYS SPACE SCI, V79, P321

[6] 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

[7] PERIODIC VERY HIGH ENERGY γ-RAY EMISSION FROM LS I+61°303 OBSERVED WITH THE MAGIC TELESCOPE [J].

Albert, J. ;

Aliu, E. ;

Anderhub, H. ;

Antonelli, L. A. ;

Antoranz, P. ;

Backes, M. ;

Baixeras, C. ;

Barrio, J. A. ;

Bartko, H. ;

Bastieri, D. ;

Becker, J. K. ;

Bednarek, W. ;

Berger, K. ;

Bernardini, E. ;

Bigongiari, C. ;

Biland, A. ;

Bock, R. K. ;

Bonnoli, G. ;

Bordas, P. ;

Bosch-Ramon, V. ;

Bretz, T. ;

Britvitch, I. ;

Camara, M. ;

Carmona, E. ;

Chilingarian, A. ;

Commichau, S. ;

Contreras, J. L. ;

Cortina, J. ;

Costado, M. T. ;

Covino, S. ;

Curtef, V. ;

Dazzi, F. ;

De Angelis, A. ;

De Cea del Pozo, E. ;

De Los Reyes, R. ;

De Lotto, B. ;

De Maria, M. ;

De Sabata, F. ;

Mendez, C. Delgado ;

Dominguez, A. ;

Dorner, D. ;

Doro, M. ;

Errando, M. ;

Fagiolini, M. ;

Ferenc, D. ;

Fernandez, E. ;

Firpo, R. ;

Fonseca, M. V. ;

Font, L. ;

Galante, N. .

ASTROPHYSICAL JOURNAL, 2009, 693 (01) :303-310

[8] CORRELATED X-RAY AND VERY HIGH ENERGY EMISSION IN THE GAMMA-RAY BINARY LS I+61 303 [J].

Anderhub, H. ;

Antonelli, L. A. ;

Antoranz, P. ;

Backes, M. ;

Baixeras, C. ;

Balestra, S. ;

Barrio, J. A. ;

Bastieri, D. ;

Becerra Gonzalez, J. ;

Becker, J. K. ;

Bednarek, W. ;

Berger, K. ;

Bernardini, E. ;

Biland, A. ;

Blanch Bigas, O. ;

Bock, R. K. ;

Bonnoli, G. ;

Bordas, P. ;

Tridon, D. Borla ;

Bosch-Ramon, V. ;

Bose, D. ;

Braun, I. ;

Bretz, T. ;

Britzger, D. ;

Camara, M. ;

Carmona, E. ;

Carosi, A. ;

Colin, P. ;

Commichau, S. ;

Contreras, J. L. ;

Cortina, J. ;

Costado, M. T. ;

Covino, S. ;

Dazzi, F. ;

De Angelis, A. ;

de Cea del Pozo, E. ;

De los Reyes, R. ;

De Lotto, B. ;

De Maria, M. ;

De Sabata, F. ;

Mendez, C. Delgado ;

Dominguez, A. ;

Prester, D. Dominis ;

Dorner, D. ;

Doro, M. ;

Elsaesser, D. ;

Errando, M. ;

Ferenc, D. ;

Fernandez, E. ;

Firpo, R. .

ASTROPHYSICAL JOURNAL LETTERS, 2009, 706 (01) :L27-L32

[9] A steady, radiative-shock method for computing X-ray emission from colliding stellar winds in close, massive-star binaries [J].

Antokhin, II ;

Owocki, SP ;

Brown, JC .

ASTROPHYSICAL JOURNAL, 2004, 611 (01) :434-451

[10] 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

← 1 2 3 4 5 6 →