DOES THE 62-DAY X-RAY PERIODICITY COME FROM ULX M82 X-1?

	DOES THE 62-DAY X-RAY PERIODICITY COME FROM ULX M82 X-1?
	Qiu, Yanli 1,2; Liu, JiFeng1 ; Guo, Jincheng 1,2; Wang, Jing3
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2015-08-20
卷号	809 期号:2
关键词	galaxies: individual (M82) X-rays: binaries
英文摘要	M82 X-1 is the brightest ultraluminous X-ray source in starburst galaxy M82 and is one of the best intermediate mass black hole candidates. Previous studies based on the Rossi X-ray Timing Explorer/Proportional Counter Array (RXTE/PCA) reported a regular X-ray flux modulation of M82 with a period of 62 days, and attributed this periodic modulation to M82 X-1. However, this modulation is not necessarily from M82 X-1 because RXTE/PCA has a very poor spatial resolution of similar to 1 degrees. In this work, we analyzed 1000 days of monitoring data of M82 X-1 from the Swift/X-ray telescope (XRT), which has a much better spatial resolution than RXTE/PCA. The periodicity distribution map of M82 reveals that the 62-day periodicity is most likely not from M82 X-1, but from the summed contributions of several periodic X-ray sources 4 '' southeast of M82 X-1. However, Swift/XRT is not able to resolve those periodic sources and locate the precise origin of the periodicity of M82. Thus, more long-term observations with higher spatial resolution are required.
收录类别	SCI
语种	英语
WOS记录号	WOS:000360715500011
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5582]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Qiu, Yanli,Liu, JiFeng,Guo, Jincheng,et al. DOES THE 62-DAY X-RAY PERIODICITY COME FROM ULX M82 X-1?[J]. ASTROPHYSICAL JOURNAL LETTERS,2015,809(2).
APA	Qiu, Yanli,Liu, JiFeng,Guo, Jincheng,&Wang, Jing.(2015).DOES THE 62-DAY X-RAY PERIODICITY COME FROM ULX M82 X-1?.ASTROPHYSICAL JOURNAL LETTERS,809(2).
MLA	Qiu, Yanli,et al."DOES THE 62-DAY X-RAY PERIODICITY COME FROM ULX M82 X-1?".ASTROPHYSICAL JOURNAL LETTERS 809.2(2015).