Optical counterparts of ULXs in NGC 1672

Basit Öğe Kaydı
dc.authoridSonbas, Eda/0000-0002-6909-192X
dc.authoridALLAK, Dr. Sinan/0000-0001-7093-1079
dc.authoridDhuga, Kalvir/0000-0002-5422-4873
dc.authoridAKYUZ, AYSUN/0000-0001-9533-9805
dc.contributor.authorAllak, S.
dc.contributor.authorAkyuz, A.
dc.contributor.authorSonbas, E.
dc.contributor.authorDhuga, K. S.
dc.date.accessioned2025-01-27T21:05:44Z
dc.date.available2025-01-27T21:05:44Z
dc.date.issued2022
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this work, we deploy archival data from Hubble Space Telescope, Chandra, XMM-Newton, and Swift-XRT, to probe the nature of nine candidate ultraluminous X-ray sources (ULXs) in NGC 1672. Specifically, our study focuses on using the precise source positions obtained via improved astrometry based on Chandra and Hubble Space Telescope observations to search for and identify potential optical counterparts for these ULXs. Unique optical counterparts are identified for two of the ULX candidates, i.e. X2 and X6; for three of the candidates, i.e. X1, X5, and X7, we found two potential counterparts for each source within the respective error radii. No optical counterparts were found for the remaining four sources. The spectral energy distribution of X2 is fitted to a blackbody spectrum with a temperature of similar to 10(4) K and the spectral class of the source is determined to be B7-A3, a supergiant donor star. We used colour-magnitude diagrams to investigate ages of the counterparts. Of all the sources studied, X9 exhibits the most variability whereby the X-ray flux varies by a factor of similar to 50 over a time period spanning 2004-2019, and also traces a partial q-curve-like feature in the hardness-intensity diagram, hinting at possible spectral transitions.
dc.description.sponsorshipScientific and Technological Research Council of Turkey(TuBTAK) [119F315, 119F334]
dc.description.sponsorshipThis research was supported by the Scientific and Technological Research Council of Turkey(TuBTAK) through project number 119F315. ES and KD acknowledge support provided by the TuBTAK through project number 119F334.
dc.identifier.doi10.1093/mnras/stac1992
dc.identifier.endpage3643
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85136305931
dc.identifier.scopusqualityQ1
dc.identifier.startpage3632
dc.identifier.urihttps://doi.org/10.1093/mnras/stac1992
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27775
dc.identifier.volume515
dc.identifier.wosWOS:000838819900003
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherOxford Univ Press
dc.relation.ispartofMonthly Notices of The Royal Astronomical Society
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectastrometry
dc.subjectgalaxies: individual: NGC 1672
dc.subjectX-rays: binaries
dc.titleOptical counterparts of ULXs in NGC 1672
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu