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dc.contributor.authorAKYÜZ, AYSUN
dc.contributor.authorOralhan, I. Akkaya
dc.contributor.authorAvdan, S.
dc.contributor.authorBALMAN, Şölen
dc.contributor.authorAKSAKER, NAZIM
dc.contributor.authorAvdan, H.
dc.date.accessioned2021-03-02T20:49:33Z
dc.date.available2021-03-02T20:49:33Z
dc.date.issued2016
dc.identifier.citationAvdan H., Avdan S., AKYÜZ A., BALMAN Ş., AKSAKER N., Oralhan I. A. , "X-RAY SPECTRAL AND OPTICAL PROPERTIES OF A ULX IN NGC 4258 (M106)", ASTROPHYSICAL JOURNAL, cilt.828, sa.2, 2016
dc.identifier.issn0004-637X
dc.identifier.otherav_03ddc201-a235-4a13-a252-5ecede0aee64
dc.identifier.othervv_1032021
dc.identifier.urihttp://hdl.handle.net/20.500.12627/8542
dc.identifier.urihttps://doi.org/10.3847/0004-637x/828/2/105
dc.description.abstractWe study the X-ray and optical properties of the ultraluminous X-ray source (ULX) X-6 in the nearby galaxy NGC 4258 (M106) based on the archival XMM-Newton, Chandra, Swift, and Hubble Space Telescope (HST) observations. The source has a peak luminosity of L-X similar to 2 x 10(39) erg s(-1) in the XMM-Newton observation of 2004 June. Consideration of the hardness ratios and the spectral model parameters shows that the source seems to exhibit possible spectral variations throughout the X-ray observations. In the images from the HST/Advanced Camera for Surveys, three optical sources have been identified as counterpart candidates within the 1 sigma error radius of 0 ''.3. The brightest one has an absolute magnitude of M-V approximate to -7.0 and shows extended structure. The remaining two sources have absolute magnitudes of M-V approximate to -5.8 and -5.3. The possible spectral types of the candidates from brightest to dimmest were determined as B6-A5, B0-A7, and B2-A3. The counterparts of the X-ray source possibly belong to a young star cluster. Neither the standard disk model nor the slim disk model provides firm evidence to determine the spectral characteristics of ULX X-6. We argue that the mass of the compact object lies in the range 10-15M(circle dot), indicating that the compact source is most likely a stellar-mass black hole.
dc.language.isoeng
dc.subjectUzay bilimi
dc.subjectTemel Bilimler
dc.subjectAstronomi ve Astrofizik
dc.subjectFizik
dc.subjectTemel Bilimler (SCI)
dc.subjectASTRONOMİ VE ASTROFİZİK
dc.titleX-RAY SPECTRAL AND OPTICAL PROPERTIES OF A ULX IN NGC 4258 (M106)
dc.typeMakale
dc.relation.journalASTROPHYSICAL JOURNAL
dc.contributor.departmentÇukurova Üniversitesi , ,
dc.identifier.volume828
dc.identifier.issue2
dc.contributor.firstauthorID2212217


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