Preliminary results on the fundamental parameters of the eclipsing binary V398 Lacertae*

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dc.authoridFrasca, Antonio/0000-0002-0474-0896
dc.authoridSoydugan, Faruk/0000-0002-5141-7645
dc.contributor.authorCakirli, Oe.
dc.contributor.authorFrasca, A.
dc.contributor.authorIbanoglu, C.
dc.contributor.authorSoydugan, Faruk
dc.contributor.authorDegirmenci, Oe.
dc.date.accessioned2025-01-27T20:11:43Z
dc.date.available2025-01-27T20:11:43Z
dc.date.issued2007
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe Hipparcos Space Astrometry Mission photometric observations of V398 Lac, led to the discovery of its variability, allowing to classify it as an eclipsing binary with an orbital period of about 5.4 days. This prompted us to acquire high-resolution echelle spectra with the aim of performing accurate radial velocity measurements and to determine the main physical parameters of the system's components. We present, for the first time, a double-lined radial velocity curve and determine the orbital and physical parameters of the two components, that can be classified both as late B-type stars. In particular, we obtained an orbital inclination i similar to 85 degrees. With this value of the inclination, we deduced masses M-1 = 3.83 +/- 0.35 M-circle dot and M-2 = 3.29 +/- 0.32 M-circle dot, and radii R-1 = 4.89 +/- 0.18 R-circle dot and R-2 = 2.45 +/- 0.11 R-circle dot for the more massive and less massive components, respectively. Both components are well inside their own Roche lobes. The mass ratio is M-2/M-1, similar to 0.86. We derived also the projected rotational velocities as v(1) sin i = 79 +/- 2 km s(-1) and v(2) Sin i = 19 +/- 2 km s(-1). Our measurements indicate that the rotation of the primary star is essentially pseudo-synchronized with the orbital velocity at the periastron, while the secondary appears to rotate very slowly and has not yet attained synchronization. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
dc.identifier.doi10.1002/asna.200610755
dc.identifier.endpage542
dc.identifier.issn0004-6337
dc.identifier.issue6
dc.identifier.scopus2-s2.0-34547451223
dc.identifier.scopusqualityQ3
dc.identifier.startpage536
dc.identifier.urihttps://doi.org/10.1002/asna.200610755
dc.identifier.urihttps://hdl.handle.net/20.500.12428/20688
dc.identifier.volume328
dc.identifier.wosWOS:000248364300009
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley-V C H Verlag Gmbh
dc.relation.ispartofAstronomische Nachrichten
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectbinaries : eclipsing
dc.subjectbinaries : spectroscopic
dc.subjectstars : fundamental parameters
dc.subjectstars : variables
dc.subjectstars : individual : V398 Lacertae
dc.titlePreliminary results on the fundamental parameters of the eclipsing binary V398 Lacertae*
dc.typeArticle

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