Anisotropic thermal emission from magnetized neutron stars

被引：0
|
作者：
Pérez-Azorín, J.F. [1 ]
Miralles, J.A. [1 ]
Pons, J.A. [1 ]
机构：
[1] Departament de Física Aplicada, Universitat d'Alacant, Ap. Correus 99, 03080 Alacant, Spain
来源：
Astronomy and Astrophysics | 1600年 / 451卷 / 03期
关键词：
Context: The thermal emission from isolated neutron stars is not well understood. The X-ray spectrum is very close to a blackbody but there is a systematic optical excess flux with respect to the extrapolation to low energy of the best blackbody fit. This fact; in combination with the observed pulsations in the X-ray flux; can be explained by anisotropies in the surface temperature distribution. Aims: We study the thermal emission from neutron stars with strong magnetic fields B ≥ 1013 G in order to explain the origin of the anisotropy. Methods: We find (numerically) stationary solutions in axial symmetry of the heat transport equations in the neutron star crust and the condensed envelope. The anisotropy in the conductivity tensor is included consistently. Results: The presence of magnetic fields of the expected strength leads to anisotropy in the surface temperature. Models with toroidal components similar to or larger than the poloidal field reproduce qualitatively the observed spectral properties and variability of isolated neutron stars. Our models also predict spectral features at energies between 0.2 and 0.6 keV for B = 1013 - 1014. © ESO 2006;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
页码：1009 / 1024
相关论文
共 50 条
  • [21] ESCAPE OF BEAMED EMISSION FROM GAMMA-RAY BURSTS ON MAGNETIZED NEUTRON STARS
    HO, C
    EPSTEIN, RI
    FENIMORE, EE
    ASTROPHYSICAL JOURNAL, 1990, 348 (01): : L25 - L28
  • [22] RADIATION FROM ACCRETING MAGNETIZED NEUTRON STARS
    MESZAROS, P
    SPACE SCIENCE REVIEWS, 1984, 38 (3-4) : 325 - 351
  • [23] Kicks of magnetized strange quark stars induced by anisotropic emission of neutrinos
    Ayala, Alejandro
    Manreza Paret, D.
    Perez Martinez, A.
    Piccinelli, Gabriella
    Sanchez, Angel
    Ruiz Montano, Jorge S.
    PHYSICAL REVIEW D, 2018, 97 (10)
  • [24] THERMAL-RADIATION OF WEAKLY MAGNETIZED NEUTRON-STARS
    SCHAAF, ME
    ASTRONOMY & ASTROPHYSICS, 1990, 235 (1-2) : 499 - 510
  • [25] QUIESCENT THERMAL EMISSION OF NEUTRON STARS IN LMXBs
    Turlione, Anabela R.
    Pons, Jose A.
    Aguilera, Deborah N.
    INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2010, 19 (06): : 805 - 817
  • [26] The intriguing thermal emission of isolated neutron stars
    Pons, JA
    Perez-Azorín, JF
    Miralles, JA
    STELLAR END PRODUCTS, 2005, 76 (03): : 518 - 522
  • [27] Thermal emission of neutron stars with internal heaters
    Kaminker, A. D.
    Kaurov, A. A.
    Potekhin, A. Y.
    Yakovlev, D. G.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2014, 442 (04) : 3484 - 3494
  • [28] On cooling of magnetized neutron stars
    Shibanov, YA
    Yakovlev, DG
    ASTRONOMY & ASTROPHYSICS, 1996, 309 (01): : 171 - 178
  • [29] Synchrotron Maser from Weakly Magnetized Neutron Stars as the Emission Mechanism of Fast Radio Bursts
    Long, Killian
    Pe'er, Asaf
    ASTROPHYSICAL JOURNAL LETTERS, 2018, 864 (01)
  • [30] Anisotropic magnetized neutron star
    Bordbar, Gholam Hossein
    Karami, Mohammad
    EUROPEAN PHYSICAL JOURNAL C, 2022, 82 (01):
12345