Optical CCD photometry and Rosat X-ray spectral analysis of the shortest period CV EI Psc (1RXS J232953.9+062814)

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dc.authoridALTAN, Metin/0000-0002-5247-887X
dc.authoridAktekin Caliskan, Ebru/0000-0002-5904-4580
dc.contributor.authorGok, F.
dc.contributor.authorGun, G. Ikis
dc.contributor.authorAktekin, E.
dc.contributor.authorSezer, A.
dc.contributor.authorAltan, M.
dc.date.accessioned2025-01-27T20:26:58Z
dc.date.available2025-01-27T20:26:58Z
dc.date.issued2009
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWe present here the optical observations of EI Psc (1RXS J232953.9 + 062814) through Turkish National Observatory (TUG) with RTT150 cm Russian-Turkish joint telescope and its X-ray observation using the ROSAT archival data. Our optical observations reveal a period of 0.0408 days (58.75 min) which is rather different from its early value of 0.046 days (66.24 min) as reported by [Schmeer, P., 2001. vsnet-alert6830, ]. Also possible periodicities as well as any QPOs are studied without having any clear indication of it. Archival ROSAT RASS data are also analyzed for its X-ray spectra. The raw data were fitted with various spectral models and the best fit models are found to be that of Blackbody and Raymond-Smith with best fit temperatures of kT = (0.07 +/- 0.02) keV for blackbody model and kT =(0.13 +/- 10.04)keV for Raymond-Smith model while the column density fixed at 0.54 x 10(-21) cm(-2). The estimated 0.1-2.4 keV flux is found to be in the range of between logF = -13 and logF = -14 erg cm(-2) s(-1). The model dependent luminosity values were in the range of log L = 29 erg s(-1) for Raymond-Smith model and logL = 31 erg s(-1) for blackbody model. Using the well fitted temperature values, the mass of the primary value that is obtained by [Uemura, M., Kato, T., Ishioka, R., Yamaoka, H., Scgmeer, P., Starkey, D.R., Torii, K., Kawai, N., Urata, Y., Kohama, M., Yoshida, A., Ayani, K., Kawabata, T., Tanabe, K., Matsumoto, K., Kiyota, S., Pietz, J., Vanmunster, T., Krajci, T., Oksanen, A., Giambersio, A., 2002b. Superhump Evolution in the Ultrashort Period Dwarf Nova (1RXS J232953.9 + 062814. PASJ 54, 599-607] and the equations taken from literature, the mass accretion rate in the boundary layer is obtained to be (1.58 +/- 0.14) x 10(21) gs(-1) for the blackbody model and (2.2 +/- 0.052) x 10(19) gs(-1) for Raymond-Smith model. As a result of our study it seems that the system El Psc has a very high mass accretion rate: and because of the observed soft X-ray photons and high mass accretion rates it has an optically thick boundary layer and M-type secondary star which can be a Brown Dwarf. (C) 2008 Elsevier B.V. All rights reserved.
dc.identifier.doi10.1016/j.newast.2008.07.003
dc.identifier.endpage165
dc.identifier.issn1384-1076
dc.identifier.issn1384-1092
dc.identifier.issue2
dc.identifier.scopus2-s2.0-53649097813
dc.identifier.scopusqualityQ2
dc.identifier.startpage160
dc.identifier.urihttps://doi.org/10.1016/j.newast.2008.07.003
dc.identifier.urihttps://hdl.handle.net/20.500.12428/22525
dc.identifier.volume14
dc.identifier.wosWOS:000261022700008
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofNew Astronomy
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectClose binary stars
dc.subjectCataclysmic variables
dc.subjectDwarf novae
dc.subjectAccretion
dc.subjectAccretion discs
dc.subjectX-ray spectra
dc.subjectMass accretion rate
dc.subjectEI Psc
dc.titleOptical CCD photometry and Rosat X-ray spectral analysis of the shortest period CV EI Psc (1RXS J232953.9+062814)
dc.typeArticle

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