Gamma-ray binaries: pulsars in disguise?

被引:227
作者
Dubus, G. [1 ]
机构
[1] Ecole Polytech, CNRS, Lab Leprince Ringuet, UMR 7638, F-91128 Palaiseau, France
[2] Univ Paris 06, CNRS, Inst Astrophys, UMR 7095, F-75014 Paris, France
关键词
acceleration of particles; stars : binaries : close; stars : pulsars : general; ISM : jets and outflows; gamma rays : theory; X-rays : binaries;
D O I
10.1051/0004-6361:20054779
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Context. LS 5039 and LS I+61 degrees 303 are unique amongst high-mass X-ray binaries (HMXB) for their spatially-resolved radio emission and their counterpart at > GeV gamma-ray energies, canonically attributed to non-thermal particles in an accretion-powered relativistic jet. The only other HMXB known to emit very high-energy (VHE) gamma-rays, PSR B1259-63, harbours a non-accreting millisecond pulsar. Aims. The purpose is to investigate whether the interaction of the relativistic wind from a young pulsar with the wind from its stellar companion, as in PSR B1259-63, constitutes a viable scenario for explaining the observations of LS 5039 and LS I+61 degrees 303. Emission arises from the shocked pulsar wind material, which then flows away to large distances in a comet-shape tail, reproducing on a smaller scale what is observed in isolated, high motion pulsars interacting with the interstellar medium. Methods. The timescales for acceleration and radiation of particles at the shock between the pulsar wind and stellar wind are calculated. Simple expectations for the spectral energy distribution (SED) are derived and are shown to depend on very few input parameters. Detailed modelling of the particle evolution is attempted and compared to the observations from radio to TeV energies. Results. Acceleration at the shock provides high-energy electrons that steadily emit synchrotron in X-rays and inverse Compton scatter stellar light to gamma-rays. Electrons streaming out of the system emit at IR frequencies and below. The overall aspect of the SEDs is adequately reproduced for standard values of the parameters. The morphology of the radio tail can mimic a microquasar jet. Good agreement is found with the published VLBI map of LS 5039 and predictions are made on the expected change in appearance with orbital phase. Conclusions. The pulsar wind scenario provides a common, viable framework for interpreting the emission from all three gamma-ray binaries.
引用
收藏
页码:801 / 817
页数:17
相关论文
共 92 条
  • [1] Microquasar LS 5039: a TeV gamma-ray emitter and a potential TeV neutrino source
    Aharonian, F.
    Anchordoqui, L.
    Khangulyan, D.
    Montaruli, T.
    [J]. TAUP 2005: PROCEEDINGS OF THE NINTH INTERNATIONAL CONFERENCE ON TOPICS IN ASTROPARTICLE AND UNDERGROUND PHYSICS, 2006, 39 : 408 - +
  • [2] Discovery of the binary pulsar PSRB1259-63 in very-high-energy gamma rays around periastron with HESS
    Aharonian, F
    Akhperjanian, AG
    Aye, KM
    Bazer-Bachi, AR
    Beilicke, M
    Benbow, W
    Berge, D
    Berghaus, P
    Bernlöhr, K
    Boisson, C
    Bolz, O
    Braun, I
    Breitling, F
    Brown, AM
    Gordo, JB
    Chadwick, PM
    Chounet, LM
    Cornils, R
    Costamante, L
    Degrange, B
    Djannati-Ataï, A
    Drury, LO
    Dubus, G
    Emmanoulopoulos, D
    Espigat, P
    Feinstein, F
    Fleury, P
    Fontaine, G
    Fuchs, Y
    Funk, S
    Gallant, YA
    Giebels, B
    Gillessen, S
    Glicenstein, JF
    Goret, P
    Hadjichristidis, C
    Hauser, M
    Heinzelmann, G
    Henri, G
    Hermann, G
    Hinton, JA
    Hofmann, W
    Holleran, M
    Horns, D
    de Jager, OC
    Johnston, S
    Khélifi, B
    Kirk, JG
    Komin, N
    Konopelko, A
    [J]. ASTRONOMY & ASTROPHYSICS, 2005, 442 (01): : 1 - 10
  • [3] Discovery of very high energy gamma rays associated with an X-ray binary
    Aharonian, F
    Akhperjanian, AG
    Aye, KM
    Bazer-Bachi, AR
    Beilicke, M
    Benbow, W
    Berge, D
    Berghaus, P
    Bernlöhr, K
    Boisson, C
    Bolz, O
    Borrel, V
    Braun, I
    Breitling, F
    Brown, AM
    Gordo, JB
    Chadwick, PM
    Chounet, LM
    Cornils, R
    Costamante, L
    Degrange, B
    Dickinson, HJ
    Djannati-Ataïi, A
    Drury, LO
    Dubus, G
    Emmanouiopoulos, D
    Espigat, P
    Feinstein, F
    Fleury, P
    Fontaine, G
    Fuchs, Y
    Funk, S
    Gallant, YA
    Giebels, B
    Gillessen, S
    Glicenstein, JF
    Goret, P
    Hadjichristidis, C
    Hauser, M
    Heinzelmann, G
    Henri, G
    Hermann, G
    Hinton, JA
    Hofmann, W
    Holieran, M
    Horns, D
    Jacholkowska, A
    de Jager, OC
    Khélifi, B
    Komin, N
    [J]. SCIENCE, 2005, 309 (5735) : 746 - 749
  • [4] RELATIVISTIC PARTICLE-ACCELERATION IN PLERIONS
    ARONS, J
    TAVANI, M
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1994, 90 (02) : 797 - 806
  • [5] HIGH-ENERGY EMISSION FROM THE ECLIPSING MILLISECOND PULSAR PSR 1957+20
    ARONS, J
    TAVANI, M
    [J]. ASTROPHYSICAL JOURNAL, 1993, 403 (01) : 249 - 255
  • [6] MASSES OF NEUTRON STARS AND BLACK-HOLES IN X-RAY BINARIES
    BAHCALL, JN
    [J]. ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1978, 16 : 241 - 264
  • [7] Origin of the transient unpulsed radio emission from the PSR B1259-63 binary system
    Ball, L
    Melatos, A
    Johnston, S
    Skjæraasen, O
    [J]. ASTROPHYSICAL JOURNAL, 1999, 514 (01) : L39 - L42
  • [8] Probing pulsar winds using inverse Compton scattering
    Ball, L
    Kirk, JG
    [J]. ASTROPARTICLE PHYSICS, 2000, 12 (04) : 335 - 349
  • [9] Propagation of very high energy γ-rays inside massive binaries LS 5039 and LSI+61° 303
    Bednarek, W
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 368 (02) : 579 - 591
  • [10] BREMSSTRAHLUNG, SYNCHROTRON RADIATION, AND COMPTON SCATTERING OF HIGH-ENERGY ELECTRONS TRAVERSING DILUTE GASES
    BLUMENTHAL, GR
    GOULD, RJ
    [J]. REVIEWS OF MODERN PHYSICS, 1970, 42 (02) : 237 - +