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 | Torres,Diego F.1,2; Ji,Long3,4; Li,Jian1; Papitto,Alessandro5; Rea,Nanda1,6; Wilhelmi,Emma de O?a1; Zhang,Shu3 |
| 刊名 | The astrophysical journal
 |
| 出版日期 | 2017-02-08 |
| 卷号 | 836期号:1 |
| 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 |
| 英文摘要 | Abstract 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. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-836-1-68 |
| 出版者 | The American Astronomical Society |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2175673 |
| 专题 | 高能物理研究所 |
| 作者单位 | 1.Institute of Space Sciences (IEEC-CSIC), Campus UAB, Carrer de Magrans s/n, E-08193 Barcelona, Spain 2.Institució Catalana de Recerca i Estudis Avan?ats (ICREA), E-08010 Barcelona, Spain 3.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China 4.Institut für Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Sand 1, D-72076 Tübingen, Germany 5.INAF-Osservatorio Astronomico di Roma, via di Frascati 33, I-00040 Monte Porzio Catone, Roma, Italy 6.Anton Pannekoek Institute, University of Amsterdam, Postbus 94249, NL-1090-GE Amsterdam, The Netherlands |
| 推荐引用方式 GB/T 7714 | Torres,Diego F.,Ji,Long,Li,Jian,et al. A search for transitions between states in redbacks and black widows using seven years of fermi-lat observations[J]. The astrophysical journal,2017,836(1). |
| APA | Torres,Diego F..,Ji,Long.,Li,Jian.,Papitto,Alessandro.,Rea,Nanda.,...&Zhang,Shu.(2017).A search for transitions between states in redbacks and black widows using seven years of fermi-lat observations.The astrophysical journal,836(1). |
| MLA | Torres,Diego F.,et al."A search for transitions between states in redbacks and black widows using seven years of fermi-lat observations".The astrophysical journal 836.1(2017). |
入库方式： iSwitch采集
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。