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首页> 外文会议>The energetic cosmos : from Suzaku to ASTRO-H >Suzaku observation of the enigmatic hard X-ray source XSS J12270-4859
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Suzaku observation of the enigmatic hard X-ray source XSS J12270-4859

机译：朱雀对神秘的硬X射线源XSS J12270-4859的观察

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摘要

We report on the results of Suzaku and RXTE X-ray observations of XSS J12270-4859, one of the hard X-ray sources in the INTEGRAL catalogue. From optical spectroscopic characteristics and a report of putative X-ray periodicity of ~860 s, the object was once classified as an intermediate polar (IP). Our Suzaku observation revealed a lack of the Fe Kα emission in a power-law spectrum and exotic phenomena in the light curve such as (1) repetitive rapid flux amplification, (2) sudden flux declines with no periodicity, and (3) spectral hardening. We also analyzed archival RXTE data, confirming flux variations similar to those found in Suzaku, and found that the previously reported 860 s period is interpreted by semi-regularly repeated flares. These timing behaviors and the power-law spectrum suggest that XSS J12270-4859 is a low-mass X-ray binary rather than an IP. Some of the temporal characteristics are also similar to those of the type II bursters, making XSS J12270-4859 a very rare type II burster candidate.
机译：我们报告了XSS J12270-4859的朱雀和RXTE X射线观察结果，XSS J12270-4859是INTEGRAL目录中的硬X射线源之一。根据光谱特征和推测的X射线周期性〜860 s的报告，该物体曾被分类为中间极性（IP）。我们的朱雀观测表明，在幂律谱中缺乏FeKα发射，并且在光曲线中出现奇异现象，例如（1）重复的快速通量放大，（2）通量突然下降且没有周期性，以及（3）光谱硬化。我们还分析了档案RXTE数据，确认了与朱雀中发现的通量变化相似的通量变化，并发现以前报道的860 s周期是由半规则重复的耀斑解释的。这些定时行为和幂律频谱表明，XSS J12270-4859是低质量的X射线二进制文件，而不是IP。一些时间特征也与II型爆发器相似，这使得XSS J12270-4859成为非常罕见的II型爆发器候选者。

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  • 来源
  • 会议地点 Hokkaido(JP)
  • 作者

    Kei SAITOU; Masahiro TSUJIMOTO; Ken EBISAWA; Manabu ISHIDA;

  • 作者单位

    Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science,3-1-1 Yoshino-dai, Sagamihara, Kanagawa 229-8510, Japan Deparment of Astronomy, Graduate School of Science, The University of Tokyo,7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;

    Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science,3-1-1 Yoshino-dai, Sagamihara, Kanagawa 229-8510, Japan;

    Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science,3-1-1 Yoshino-dai, Sagamihara, Kanagawa 229-8510, Japan;

    Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science,3-1-1 Yoshino-dai, Sagamihara, Kanagawa 229-8510, Japan;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 恒星天文学、星系天文学、宇宙学;
  • 关键词

    stars; individual (XSS J12270-4859) — stars; variables; other — X-rays; stars;

    机译：星星;个人（XSS J12270-4859）-星星；变量其他— X射线；星星;

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