Gamma-rays and cosmic rays from a pulsar in Cygnus OB2

被引：34

作者：

Bednarek, W ^{[1
]}

机构：

[1] Univ Lodz, Dept Expt Phys, PL-90236 Lodz, Poland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2003年 / 345卷 / 03期

关键词：

radiation mechanisms : non-thermal; pulsars : general; ISM : clouds; cosmic rays; open clusters and associations : individual : Cyg OB2; gamma-rays : theory;

D O I：

10.1046/j.1365-8711.2003.06997.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We argue that gamma-ray sources observed in the direction of the Cygnus OB2 association in the GeV and TeV energy range are due to a pulsar that was created by a supernova a few tens of thousands of years ago. The GeV emission is produced by a middle-aged pulsar, a factor of 2 older than the Vela pulsar. The TeV emission is produced by high-energy hadrons and/or leptons accelerated in pulsar wind nebulae. We suggest, moreover, that the excess of cosmic rays at similar to10(18) eV observed from the direction of the Cygnus region can also be related to the appearance of this very energetic pulsar in the Cyg OB2 association. Some of the relativistic hadrons, captured in strong magnetic fields of a high-density region of Cyg OB2, produce neutrons and gamma-rays in collisions with matter. These neutrons can arrive from Cyg OB2, creating an excess of cosmic rays.

引用

页码：847 / 853

页数：7

共 47 条

[1] An unidentified TeV source in the vicinity of Cygnus OB2 [J].

Aharonian, F ;

Akhperjanian, A ;

Beilicke, M ;

Bernlöhr, K ;

Börst, H ;

Bojahr, H ;

Bolz, O ;

Coarasa, T ;

Contreras, J ;

Cortina, J ;

Denninghoff, S ;

Fonseca, V ;

Girma, M ;

Götting, N ;

Heinzelmann, G ;

Hermann, G ;

Heusler, A ;

Hofmann, W ;

Horns, D ;

Jung, I ;

Kankanyan, R ;

Kestel, M ;

Kettler, J ;

Kohnle, A ;

Konopelko, A ;

Kornmeyer, H ;

Kranich, D ;

Krawczynski, H ;

Lampeitl, H ;

Lopez, M ;

Lorenz, E ;

Lucarelli, F ;

Magnussen, N ;

Mang, O ;

Meyer, H ;

Milite, M ;

Mirzoyan, R ;

Moralejo, A ;

Ona, E ;

Panter, M ;

Plyasheshnikov, A ;

Prahl, J ;

Pühlhofer, G ;

Rauterberg, G ;

Reyes, R ;

Rhode, W ;

Ripken, J ;

Röhring, A ;

Rowell, GP ;

Sahakian, V .

ASTRONOMY & ASTROPHYSICS, 2002, 393 (02) :L37-L40

[2]

Aharonian F. A., 1998, New Astronomy Reviews, V42, P579, DOI 10.1016/S1387-6473(98)00075-X

[3]

[Anonymous], AIP C SER

[4]

Arons J., 1998, MEM SOC ASTRON ITAL, V69, P989

[5]

BECKER W, 1995, ASTRON ASTROPHYS, V298, P528

[6] Gamma rays and neutrinos from the crab nebula produced by pulsar accelerated nuclei [J].

Bednarek, W ;

Protheroe, RJ .

PHYSICAL REVIEW LETTERS, 1997, 79 (14) :2616-2619

[7] Gamma-rays from the pulsar wind nebulae [J].

Bednarek, W ;

Bartosik, M .

ASTRONOMY & ASTROPHYSICS, 2003, 405 (02) :689-702

[8] Contribution of nuclei accelerated by gamma-ray pulsars to cosmic rays in the Galaxy [J].

Bednarek, W ;

Protheroe, RJ .

ASTROPARTICLE PHYSICS, 2002, 16 (04) :397-409

[9] Southern hemisphere observations of a 1018 eV cosmic ray source near the direction of the Galactic Centre [J].

Bellido, JA ;

Clay, RW ;

Dawson, BR ;

Johnston-Hollitt, M .

ASTROPARTICLE PHYSICS, 2001, 15 (02) :167-175

[10]

Bertsch DL, 2000, AIP CONF PROC, V510, P504

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