Parameters of the visually close binary system Hip11253 (HD14874)

Al-Wardat, Mashhoor A.; Widyan, Hatem

doi:10.1134/s1990341309040063

Cited by 17 publications

(12 citation statements)

References 9 publications

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“…The rich data of Gaia DR2 are already being implemented in solving orbits and masses of binary and multiple systems, see for example Tokovinin's work (Tokovinin 2018a(Tokovinin ,b, 2019aTokovinin et al 2019;Tokovinin 2019c). It is also very useful in determining the physical and geometrical parameters of BSs, using Al-Wardat's method, which has been used to analyse several solar-type binary and triple systems (Al-Wardat 2009;Al-Wardat & Widyan 2009;Al-Wardat 2012;Al-Wardat et al 2014cMasda et al 2016;Al-Wardat et al 2017;Masda et al 2019b), and was successfully applied to subgiant BSs like HD 25811, HD 375, HD 6009 (Al-Wardat et al 2014a,b;Al-Wardat 2014) and Hip 68170 in this work.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Gaia and Hipparcos parallaxes of close visual binary stars and the impact on determinations of their masses

Al-Wardat

Hussein

Al-Naimiy

et al. 2021

Publ. Astron. Soc. Aust.

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Precise measurement of the fundamental parameters of stellar systems, including mass and radius, depends critically on how well the stellar distances are known. Astrometry from space provides parallax measurements of unprecented accuracy, from which distances can be derived, initially from the Hipparcos mission, with a further refinement of that analysis provided by van Leeuwen in 2007. The publication of the Gaia DR2 catalogue promises a dramatic improvement in the available data. We have recalculated the dynamical masses of a sample of 1 700 close visual binary stars using Gaia DR2 and compared the results with masses derived from both the original and enhanced Hipparcos data. We show the van Leeuwen analysis yields results close to those of Gaia DR2, but the latter are significantly more accurate. We consider the impact of the Gaia DR2 parallaxes on our understanding of the sample of visual binaries.

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Section: Discussionmentioning

confidence: 99%

Comparison of Gaia and Hipparcos parallaxes of close visual binary stars and the impact on determinations of their masses

Al-Wardat

Hussein

Al-Naimiy

et al. 2021

Publ. Astron. Soc. Aust.

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“…These parameters include the effective temperatures, radii, orbital elements, spectral types, luminosity classes and masses for both components of the binary system. The method was successfully applied to several main sequence binary systems: ADS11061, Cou1289, Cou1291, Hip11352, Hip11253, Hip70973 and Hip72479 [1,2,4,6,8], and to the subgiant systems HD25811 and HD375 [7,9].…”

Section: Introductionmentioning

confidence: 99%

Physical and geometrical parameters of the binary system gliese 150.2

et al. 2014

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Atmospheric modeling and dynamical analysis of the components of the visually close binary system (VCBS) HD6009 were used to estimate their individual physical and geometrical parameters. Model atmospheres were constructed using a grid of Kurucz solar metalicity blanketed models, and used to compute the individual synthetic spectral energy distribution (SED) for each component separately. These SEDs were combined together to compute the entire SED for the system from the net luminosities of the components a and b located at a distance d from the Earth. We used the feedback modified parameters and iteration method to get the best fit between synthetic and observational entire SEDs.The physical and geometrical parameters of the system's components were derived as:15M⊙, La = 6.80 ± 0.75L⊙, L b = 6.09 ± 0.75L⊙ and π = 14.43mas dynamical parallax. The system is shown to be consist of G6 IV primary and G6 IV secondary components.

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“…Combining spectrophotometry with atmospheric modelling gives a new method for the accurate determination of the physical and geometrical parameters of both components of VCBS, in addition to the estimation of their spectral types, luminosity classes, and ages. This method, first advised by Al-Wardat (2002a, 2007), was applied to several VCBS such as ADS11061, Cou1289, Cou1291, Hip11352, Hip11253, Hip70973, and Hip72479 (Al-Wardat 2002a, 2007, 2009, 2012; Al-Wardat & Widyan 2009).…”

Section: Introductionmentioning

confidence: 99%

“…This method, first advised by Al-Wardat (2002a, 2007, was applied to several VCBS such as ADS11061, Cou1289, Cou1291, Hip11352, Hip11253, Hip70973, and Hip72479 (Al-Wardat 2002a, 2007, 2009, 2012Al-Wardat & Widyan 2009).…”

Section: Introductionmentioning

confidence: 99%

Complex Analysis of the Stellar Binary HD25811: A Subgiant System

Al-Wardat

Widyan

Al-thyabat

2014

Publ. Astron. Soc. Aust.

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The visually close binary system HD25811 is analysed to estimate its physical and geometrical parameters in addition to its spectral type and luminosity class. The method depends on obtaining the best fit between the entire observational spectral energy distribution (SED) of the system and synthetic SEDs created by atmospheric modelling of the individual components, consistent with the system's modified orbital elements. The parameters of the individual components of the system are derived as: T

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Parameters of the visually close binary system Hip11253 (HD14874)

Cited by 17 publications

References 9 publications

Comparison of Gaia and Hipparcos parallaxes of close visual binary stars and the impact on determinations of their masses

Comparison of Gaia and Hipparcos parallaxes of close visual binary stars and the impact on determinations of their masses

Physical and geometrical parameters of the binary system gliese 150.2

Complex Analysis of the Stellar Binary HD25811: A Subgiant System

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