A Search for Transitions between States in Redbacks and Black Widows Using Seven Years of Fermi-LAT Observations
文献类型：期刊论文
| 作者 | Rea, N; Torres, DF; Ji, LN; Li, J ; Papitto, A; Wilhelmi, ED; Zhang, S; Zhang S(张澍)
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017 |
| 卷号 | 836期号:1页码:68 |
| 关键词 | gamma-rays: stars pulsars: individual (PSR J1023+0038, PSR J1227-4853) |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/836/1/68 |
| 文献子类 | Article |
| 英文摘要 | Considering about seven years of Fermi-Large Area Telescope (LAT) data, we present a systematic search for variability that is possibly related to transitions between states in redbacks and black widow systems. The transitions are characterized by sudden and significant changes in the gamma-ray flux that persist on a timescale that is much larger than the orbital period. This phenomenology was already detected in the case of two redback systems, PSR J1023+0038 and PSR J1227-4853, which we present here. We show the existence of only one transition for each of these systems over the past seven years. We determine their spectra, establishing high-energy cutoffs at a few GeV for the high gamma-ray state of PSR J1023+0038, and for both states of PSR J1227-4853. The surveying capability of the Fermi-LAT allows further study of whether similar phenomenology has occurred in other sources. Although we have not found any evidence of a state transition for most of the studied pulsars, we note two black-widow systems, PSR J2234+0944 and PSR J1446-4701, whose apparent variabilities are. reminiscent of the transitions in PSR J1023+0038 and PSR J1227-4853. For the other systems, we set limits on potential transitions in their measured gamma-ray light curves. |
| 电子版国际标准刊号 | 1538-4357 |
| WOS关键词 | LARGE-AREA TELESCOPE ; X-RAY BINARY ; MILLISECOND PULSAR ; PSR J1023+0038 ; XSS J12270-4859 ; ECLIPSING BINARY ; EMISSION ; CATALOG ; PULSATIONS ; DISCOVERY |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000397304500020 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284705]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Rea, N,Torres, DF,Ji, LN,et al. A Search for Transitions between States in Redbacks and Black Widows Using Seven Years of Fermi-LAT Observations[J]. ASTROPHYSICAL JOURNAL,2017,836(1):68. |
| APA | Rea, N.,Torres, DF.,Ji, LN.,Li, J.,Papitto, A.,...&张澍.(2017).A Search for Transitions between States in Redbacks and Black Widows Using Seven Years of Fermi-LAT Observations.ASTROPHYSICAL JOURNAL,836(1),68. |
| MLA | Rea, N,et al."A Search for Transitions between States in Redbacks and Black Widows Using Seven Years of Fermi-LAT Observations".ASTROPHYSICAL JOURNAL 836.1(2017):68. |
入库方式： OAI收割
来源：高能物理研究所
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