Absolute parameters of the newly-identified contact binary star IS Canis Major

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dc.contributor.authorOzkardes, B.
dc.contributor.authorErdem, A.
dc.date.accessioned2025-01-27T20:41:51Z
dc.date.available2025-01-27T20:41:51Z
dc.date.issued2010
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis paper presents the results of the first high-resolution spectroscopic observations of the Southern W UMa type system IS CMa. Spectroscopic observations of the system were made at Mt. John University Observatory using a HERCULES fibre-fed echelle spectrograph in September 2007. The first radial velocities of the component stars of the system were determined by using the spectral disentangling technique. The resulting orbital elements of IS CMa are: a(1) sin i = 0.0041 +/- 0.0001 AU, a(2) sin i = 0.0135 +/- 0.0001 AU, M(1) sin(3) i = 1.48 +/- 0.01 M(circle dot), and M(2) sin(3) i = 0.44 +/- 0.01 M(circle dot). The components were found to be in synchronous rotation taking into account the disentangled H(delta) line profiles of both components of the system. The Hipparcos light curve was solved by means of the Wilson-Devinney method supplemented with a Monte Carlo type algorithm. The radial velocity curve solutions including the proximity effects give the mass ratio of the system as 0.297 +/- 0.001. The combination of the Hipparcos light and radial velocity curve solutions give the following absolute parameters of the components: M(1) = 1.68 +/- 0.04 M(circle dot), M(2) = 0.50 +/- 0.02 M(circle dot), R(1) = 2.00 +/- 0.02 R(circle dot), R(2) = 1.18 +/- 0.03 R(circle dot), L(1) = 7.65 +/- 0 60. L(circle dot) and L(2) = 1.99 +/- 0.80 L(circle dot), The distance to IS CMa was calculated as 87 +/- 5 pc using the distance modulus with corrections for interstellar extinction. The position of the components of IS CMa in the HR diagram are also discussed: the system seems to have an age of 1.6 Gyr. (C) 2009 Elsevier B.V. All rights reserved.
dc.description.sponsorshipCanakkale Onsekiz Mart University Research Foundation [2007/56]
dc.description.sponsorshipThis study forms part of the PhD studies of B. Ozkardes and was supported by Canakkale Onsekiz Mart University Research Foundation under Grant No. 2007/56. We thank Prof John Hearnshaw for granting us use of facilities at Mt John University Observatory, New Zealand. We also thank Mr. G.H. Lee for checking the English.
dc.identifier.doi10.1016/j.newast.2009.07.011
dc.identifier.endpage253
dc.identifier.issn1384-1076
dc.identifier.issue2
dc.identifier.scopus2-s2.0-70350231470
dc.identifier.scopusqualityQ2
dc.identifier.startpage247
dc.identifier.urihttps://doi.org/10.1016/j.newast.2009.07.011
dc.identifier.urihttps://hdl.handle.net/20.500.12428/24253
dc.identifier.volume15
dc.identifier.wosWOS:000271732000007
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Bv
dc.relation.ispartofNew Astronomy
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectBinaries: eclipsing
dc.subjectStars: fundamental parameters
dc.subjectTechnique: spectroscopy
dc.subjectTechnique: photometry
dc.subjectStars: individual (IS CMa)
dc.titleAbsolute parameters of the newly-identified contact binary star IS Canis Major
dc.typeArticle

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