Orbital and physical parameters of the close binary system: GJ 9830 (HIP 116259)

Abstract

We present the complete set of physical and geometrical parameters of the visual close binary system GJ\,9830 for the first time by using Al-Wardat's complex method. This method combines magnitude difference from speckle interferometry, synthetic spectral energy distributions of the binary components which are constructed depending on grids of Kurucz blanketed models (Atlas9), along with the orbital solution by using Tokovinin's dynamical method to estimate the parameters of the individual components. The analysis of the system by using synthetic photometry resulted in the following set of parameters: $T_{eff.}=6220\pm 100$ \,K, $\log \mathrm{g}=4.30\pm 0.12$, $R=1.10\pm 0.08R_{\odot }$ for the primary component and $T_{eff.}=4870\pm 100$\,K, $\log \mathrm{g}=4.60\pm 0.11$, $R=0.709\pm 0.07R_{\odot }$ for the secondary component. The recently published dynamical parallax from \textit{Gaia} space mission was used to calculate the total mass of the binary system as $1.75\pm 0.06{\mathcal{M}}_{\odot }$ which coincides with those estimated by using Al-Wardat's method as ${\mathcal{M}}^A=1.18\pm 0.10{\mathcal{M}}_{\odot }$, ${\mathcal{M}}^B=0.75\pm 0.08{\mathcal{M}}_{\odot }$. The analysis of the system reveals that both components belong to main sequence stars with an age around $1.4\pm 0.50$\,Gyr. The evolutionary tracks and isochrones of the system's components are discussed, and the fragmentation process is suggested as the most likely process for the formation of the system.

arXiv comment13 page, 5 figures

References in corpus (18)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Validation of the new Hipparcos reduction
• Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
• Speckle interferometry at the Blanco and SOAR telescopes in 2008 and 2009
• The Palomar/Keck Adaptive Optics Survey of Young Solar Analogs: Evidence for a Universal Companion Mass Function
• Spectrophotometric Libraries, Revised Photonic Passbands and Zero-points for UBVRI, Hipparcos and Tycho Photometry
• Observations of Binary Stars with the Differential Speckle Survey Instrument. VII. Measures from 2010 September to 2012 February at the WIYN Telescope
• Know the Star, Know the Planet. II. Speckle Interferometry of Exoplanet Host Stars
• Speckle Interferometry of Nearby Multiple Stars. IV. Measurements in 2004 and New Orbits
• Know the Star, Know the Planet. I. Adaptive Optics of Exoplanet Host Stars
• Physical Parameters of the Visually Close Binary Systems Hip70973 and Hip72479
• New orbits based on speckle interferometry at SOAR. II
• Physical and Geometrical Parameters of CVBS XII: Fin 350 (Hip 64838)
• Complex Analysis of the Stellar Binary HD25811; A Subgiant System
• Physical and Geometrical Parameters of CVBS XI: COU1511 (HIP12552)
• Physical and Geometrical Parameters of CVBS X: The Spectroscopic Binary Gliese 762.1
• Physical and Geometrical Parameters of VCBS XIII: HIP 105947
• Stellar parameters of the two binary systems: HIP 14075 and HIP 14230

Cited by in corpus (3)

• Comparison of Gaia and Hipparcos parallaxes of close visual binary stars and the impact on determinations of their masses
• The stellar system HIP 101227: is it a binary, a triple or a quadruple system?
• A Comprehensive Study of the Physical and Geometrical Characteristics of the Close Visual Binary System HIP 45571