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Physical and geometrical parameters of CVBS XIV: the two nearby systems HIP 19206 and HIP 84425
Al-Wardat, Mashhoor A.1,2; Abu-Alrob, Enas3; Hussein, Abdallah M.3; Mardini, Mohammad K.4; Taani, Ali A.5; Widyan, Hatem S.3; Yousef, Zahraa T.6; Al-Naimiy, Hamid M.1,2; Yusuf, Nihad A.7
2021-08-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume21Issue:7Pages:9
AbstractData release 2 (DR2) from the Gaia mission was of great help in precise determination of fundamental parameters of Close Visual Binary and Multiple Systems (CVBMSs), especially masses of their components, which are crucial parameters in understanding formation and evolution of stars and galaxies. This article presents the complete set of fundamental parameters for two nearby close visual binary systems (CVBSs), which are HIP 19206 and HIP 84425. We utilised a combination of two methods; the first one is Tokovinin's dynamical method to solve the orbit of the system and to estimate orbital elements and the dynamical mass sum, and the second one is Al-Wardat's method for analysing CVBMSs to estimate the physical parameters of the individual components. The latest method employs grids of Kurucz line-blanketed plane parallel model atmospheres to build synthetic Spectral Energy Distributions (SEDs) of the individual components. Trigonometric parallax measurements given by Gaia DR2 and Hipparcos catalogues are used to analyse the two systems. The difference in these measurements yielded slight discrepancies in the fundamental parameters of the individual components, especially masses. So, a new dynamical parallax is suggested in this work based on the most convenient mass sum as given by each of the two methods. The new dynamical parallax for the system HIP 19205 of 22.97 +/- 0.95 mas coincides well with the trigonometric one reported recently (in December 2020) by Gaia EDR3 of 22.3689 +/- 0.4056 mas. The positions of the components of the two systems on the evolutionary tracks and isochrones are plotted, which suggest that all components are solar-type main sequence stars. Their most probable formation and evolution scenarios are also discussed.
Keywordbinaries close binaries visual stars fundamental parameters stars individual HIP 19206 and HIP 84425
DOI10.1088/1674-4527/21/7/161
WOS KeywordSPECKLE INTERFEROMETRY ; BINARY ; SOAR ; ORBITS ; STARS
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000691275900001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75368
Collection中国科学院国家天文台
Corresponding AuthorAl-Wardat, Mashhoor A.
Affiliation1.Univ Sharjah, Dept Appl Phys & Astron, Sharjah, U Arab Emirates
2.Sharjah Acad Astron Space Sci & Technol, Sharjah, U Arab Emirates
3.Al al Bayt Univ, Dept Phys, Mafraq 25113, Jordan
4.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100101, Peoples R China
5.Al Balqa Appl Univ, Fac Sci, Phys Dept, Salt 19117, Jordan
6.Univ Kebangsaan Malaysia, Fac Sci & Technol, Dept Appl Phys, Ukm Bangi 43600, Selangor, Malaysia
7.Yarmouk Univ, Dept Phys, Irbid 21163, Jordan
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GB/T 7714
Al-Wardat, Mashhoor A.,Abu-Alrob, Enas,Hussein, Abdallah M.,et al. Physical and geometrical parameters of CVBS XIV: the two nearby systems HIP 19206 and HIP 84425[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(7):9.
APA Al-Wardat, Mashhoor A..,Abu-Alrob, Enas.,Hussein, Abdallah M..,Mardini, Mohammad K..,Taani, Ali A..,...&Yusuf, Nihad A..(2021).Physical and geometrical parameters of CVBS XIV: the two nearby systems HIP 19206 and HIP 84425.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(7),9.
MLA Al-Wardat, Mashhoor A.,et al."Physical and geometrical parameters of CVBS XIV: the two nearby systems HIP 19206 and HIP 84425".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.7(2021):9.
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