Discovery of a New X-Ray Burst/Millisecond Accreting Pulsar, HETE J1900.1-2455
[摘要] Aclassoflow-massX-raybinarysourcesisknowntobebothX-rayburstsourcesandmillisecondpulsarsatthesametime.AnewsourceofthisclasswasdiscoveredbyHighEnergyTransientExplorer2(HETE-2)on2005June14asasourceoftype-IX-raybursts,whichwasnamedHETEJ1900.1$$-$$2455.FiveX-rayburstsfromHETEJ1900.1$$-$$2455wereobservedduringthesummerof2005.Atime-resolvedspectralanalysisoftheseburstshasrevealedthattheirspectraareconsistentwiththeblackbodyradiationthroughoutthebursts.Theburstsshowanindicationofradiusexpansion.Thebolometricfluxremainedalmostconstantduringthephotosphericradiusexpansion,whileblackbodytemperaturedroppedduringthesameperiod.AssumingthatthefluxreachedtheEddingtonlimitonastandard1.4solar-massneutronstarwithaheliumatmosphere,weestimatethedistancetothesourcetobe$$sim$$4 Kpc.
[发布日期] [发布机构]
[效力级别] [学科分类] 天文学(综合)
[关键词] "stars: neutron";"pulsars: individual (HETE J1900.1–2455)";"X-rays: bursts" [时效性]
