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Article: A Possible 55-day X-ray Period of the Ultraluminous Accreting Pulsar M82 X-2

TitleA Possible 55-day X-ray Period of the Ultraluminous Accreting Pulsar M82 X-2
Authors
Issue Date2016
PublisherOxford University press, co-published with Royal Astronomical Society. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/
Citation
Monthly Notices of the Royal Astronomical Society, 2016, v. 461 n. 4, p. 4395-4399 How to Cite?
AbstractWe report a possible detection of a 55-day X-ray modulation for the ultraluminous accreting pulsar M82 X-2 from archival Chandra observations. Because M82 X-2 is known to have a 2.5-day orbital period, if the 55-day period is real, it will be the superorbital period of the system. We also investigated variabilities of other three nearby ultraluminous X-ray sources in the central region of M82 with the Chandra data and did not find any evidence of periodicities. Furthermore, we re-examined the previously reported 62-day periodicity near the central region of M82 by performing a systematic timing study with all the archival Rossi X-Ray Timing Explorer and Swift data. Using various dynamic timing analysis methods, we confirmed that the 62-day period is not stable, suggesting that it is not the orbital period of M82 X-1 in agreement with previous work.
Persistent Identifierhttp://hdl.handle.net/10722/229401
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806

 

DC FieldValueLanguage
dc.contributor.authorKong, A. K. H.-
dc.contributor.authorHu, CP-
dc.contributor.authorLin, L. C. C.-
dc.contributor.authorLi, K. L.-
dc.contributor.authorJin, R.-
dc.contributor.authorLiu, C. Y.-
dc.contributor.authorYen, D. C.-C.-
dc.date.accessioned2016-08-23T14:10:55Z-
dc.date.available2016-08-23T14:10:55Z-
dc.date.issued2016-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2016, v. 461 n. 4, p. 4395-4399-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/229401-
dc.description.abstractWe report a possible detection of a 55-day X-ray modulation for the ultraluminous accreting pulsar M82 X-2 from archival Chandra observations. Because M82 X-2 is known to have a 2.5-day orbital period, if the 55-day period is real, it will be the superorbital period of the system. We also investigated variabilities of other three nearby ultraluminous X-ray sources in the central region of M82 with the Chandra data and did not find any evidence of periodicities. Furthermore, we re-examined the previously reported 62-day periodicity near the central region of M82 by performing a systematic timing study with all the archival Rossi X-Ray Timing Explorer and Swift data. Using various dynamic timing analysis methods, we confirmed that the 62-day period is not stable, suggesting that it is not the orbital period of M82 X-1 in agreement with previous work.-
dc.languageeng-
dc.publisherOxford University press, co-published with Royal Astronomical Society. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.rightsMonthly Notices of the Royal Astronomical Society. Copyright © Oxford University press, co-published with Royal Astronomical Society.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleA Possible 55-day X-ray Period of the Ultraluminous Accreting Pulsar M82 X-2-
dc.typeArticle-
dc.identifier.emailHu, CP: cphu@hku.hk-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1093/mnras/stw1558-
dc.identifier.hkuros262651-
dc.identifier.volume461-
dc.identifier.issue4-
dc.identifier.spage4395-
dc.identifier.epage4399-
dc.publisher.placeUnited Kingdom-

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