HIGH-ENERGY OBSERVATIONS OF PSR B1259-63/LS 2883 THROUGH THE 2014 PERIASTRON PASSAGE: CONNECTING X-RAYS TO THE GeV FLARE

被引：27

作者：

Tam, P. H. T. ^{[1
,2
,3
]}

Li, K. L. ^{[1
,2
]}

Takata, J. ^{[3
]}

Okazaki, A. T. ^{[4
]}

Hui, C. Y. ^{[5
]}

Kong, A. K. H. ^{[1
,2
]}

机构：

[1] Natl Tsing Hua Univ, Inst Astron, Hsinchu, Taiwan

[2] Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan

[3] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[4] Hokkai Gakuen Univ, Fac Engn, Toyohira Ku, Sapporo, Hokkaido 0628605, Japan

[5] Chungnam Natl Univ, Dept Astron & Space Sci, Taejon, South Korea

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2015年 / 798卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

gamma rays: stars; pulsars: individual (PSR B1259-63); X-rays: binaries; MULTIWAVELENGTH LIGHT CURVES; LARGE-AREA TELESCOPE; PULSAR WIND; GAMMA-RAYS; SYSTEM; EMISSION; DISCOVERY; RADIO;

D O I：

10.1088/2041-8205/798/1/L26

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The binary system PSR B1259-63/LS 2883 is well sampled in radio, X-rays, and TeV gamma-rays, and shows orbital-phase-dependent variability in these frequencies. The first detection of GeV gamma-rays from the system was made around the 2010 periastron passage. In this Letter, we present an analysis of X-ray and gamma-ray data obtained by the Swift/XRT, NuSTAR/FPM, and Fermi/LAT, through the recent periastron passage which occurred on 2014 May 4. While PSR B1259-63/LS 2883 was not detected by the Large Area Telescope before and during this passage, we show that the GeV flares occurred at a similar orbital phase as in early 2011, thus establishing the repetitive nature of the post-periastron GeV flares. Multiple flares each lasting for a few days have been observed and short-term variability is seen as well. We also found X-ray flux variation contemporaneous with the GeV flare for the first time. Strong evidence of the keV-to-GeV connection came from the broadband high-energy spectra, which we interpret as synchrotron radiation from the shocked pulsar wind.

引用

页数：6

共 37 条

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