Post-Periastron ASCA Observation of the PSR B1259–63 System

Publications of the Astronomical Society of Japan

Tavani, Marco⁵  Arons, Jonathan³  Hirayama, Masaharu⁶  Nagase, Fumiaki²  Kaspi, Victoria M.⁴  Kawai, Nobuyuki¹ 

[1] The Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 351-01;The Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229 E-mail(MH):;Department of Astronomy and Department of Physics, University of California, Berkeley, CA 94720, U.S.A;Hubble Fellow, IPAC/Caltech/Jet Propulsion Laboratory, Pasadena, CA 91125, U.S.A;Columbia Astrophysics Laboratory, New York, NY 10027, U.S.A;The Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229 E-mail(MH): Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113

关键词: Pulsars;    "Stars: Be";    "Stars: individual (PSR B1259-63)";    "Stars: individual (SS 2883)";    "X-rays: binaries";   

DOI  :  10.1093/pasj/48.6.833

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Wereportontheresultsofapost-periastronASCAobservationofthePSRB1259–63system,containinga48mspulsarorbitingaBestarinaneccentric3.4yrorbit.TheASCAobservationwascarriedouton1994February28whentheradiopulsarwasagainvisibleafteraprolonged40-dayradioeclipseneartoperiastron.ThesourcewasclearlydetectedwithanX-rayluminosity(1–10keV)LXof(1.03±0.09)×1034(d/2kpc)2ergs−1,wheredisthepulsar'sdistance.TheX-rayspectrumiswell-representedbyasinglepower-lawmodelofthephotonindex,α=1.61±0.06,andasmallphotoelectricabsorption,NH=(5.6±0.6)×1021cm−2.NosignificantX-raypulsationsweredetected,andtheupperlimitforthepulsedcomponentwasestimatedtobe15%ofthetotalX-rayflux,assumingsinusoidalmodulation.ThecharacteristicsoftheX-rayemissiondetectedon1994February28aresimilartothosedetectedbyASCAnearperiastronwhenthepulsedradioemissionfromPSRB1259-63waseclipsed.Ourresultsstronglyfavoranon-thermalmodelofX-rayemissiondrivenbysynchrotronradiationfromrelativisticshockedparticlesinthepulsarwindinteractingwiththeoutflowfromtheBestarcompanion.

【 授权许可】

Unknown