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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1616
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dc.contributor.authorDatta, Bhaskar-
dc.contributor.authorThampan, Arun V.-
dc.contributor.authorBombaci, Ignazio-
dc.date.accessioned2006-12-22T10:29:02Z-
dc.date.available2006-12-22T10:29:02Z-
dc.date.issued2000-03-
dc.identifier.citationAstronomy and Astrophysics, 2000, Vol.355, pL19-L22en
dc.identifier.issn0004-6361-
dc.identifier.urihttp://hdl.handle.net/2289/1616-
dc.description.abstractKilohertz quasi-periodic brightness oscillations (kHz QPOs) observed in certain X-ray burst sources may represent Keplerian frequencies in the inner regions of the accretion disk in such systems. If this assumption is strictly adhered to, we show here that if the central accretor in stellar X-ray burst sources is a strange star (made up of u, d and s quarks in beta equilibrium, referred to as strange matter) then the calculated QPO frequencies are reconcilable with the observed QPO frequencies (corresponding to the highest frequency of 1.22 kHz, observed so far from the source 4U 1636-53) only for particular values of the QCD-related parameters which describe the equation of state of strange matter. We demonstrate that QPO frequencies in the very high range (1.9-3.1) kHz can be understood in terms of a (non-magnetized) strange star X-ray binary (SSXB) rather than a neutron star X-ray binary (NSXB). Future discovery of such high frequency QPOs from X-ray burst sources will constitute a new astrophysical diagnostic for identifying solar mass range stable strange stars in our galaxy.en
dc.format.extent162897 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherSpringer-Verlagen
dc.relation.urihttp://arxiv.org/abs/astro-ph/9912173en
dc.relation.urihttp://adsabs.harvard.edu/cgi-bin/bib_query?2000A&A...355L..19Den
dc.rights(2000) by the European Southern Observatoryen
dc.subjectACCRETIONen
dc.subjectACCRETION DISKSen
dc.subjectDENSE MATTERen
dc.subjectEQUATION OF STATEen
dc.subjectSTARS: BINARIES: CLOSEen
dc.subjectSTARS: NEUTRONen
dc.subjectX-RAYS: BURSTSen
dc.titlePossible signatures for strange stars in stellar X-ray binariesen
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

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