Binary star speckle measurements at Calar Alto. I.

Docobo, J. A.; Tamazian, V. S.; Balega, Yu. Yu.; Blanco, J.; Maximov, A. F.; Vasyuk, V. A.

doi:10.1051/0004-6361:20000298

Cited by 11 publications

(8 citation statements)

References 6 publications

(5 reference statements)

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“…In addition to that, Docobo et al (2001) pointed out that the study of orbital motion of visual and interferometric pairs remains an important astronomical discipline. The visual binaries are the main key source of information about stellar masses and distances, and they define practically our understanding of stellar physical properties especially for the lower part of the main sequence stars .…”

Section: Introductionmentioning

confidence: 99%

Physical and geometrical parameters of CVBS XI: Cou 1511 (HIP 12552)

Al-Wardat

El-Mahameed

Yusuf

et al. 2016

Res. Astron. Astrophys.

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Model atmospheres of the close visual binary star COU1511 (HIP12552) are constructed using grids of Kuruz's blanketed models to build the individual synthetic SEDs for both components. These synthetic SED's are combined together for the entire system and compared with the observational one following Al-Wardat's complex method for analyzing close visual binary stars. The entire observational spectral energy distribution (SED) of the system is used as a reference for comparison between synthetic SED and the observed one. The parameters of both components are derived as: T a eff = 6180 ± 50 K, T b eff = 5865 ± 70 K, log g a = 4.35 ± 0.12, log g b = 4.45 ± 0.14, R a = 1.262 ± 0.08R ⊙ , R b = 1.006 ± 0.07R ⊙ , L a = 2.09 ± 0.10L ⊙ , L b = 1.08 ± 0.12L ⊙ , with spectral types F8 and G1 for both components (a,b) respectively, and age of 3.0 ± 0.9 Gy. A modified orbit of the system is built and the masses of the two components are calculated as M a = 1.17 ± 0.11M ⊙ , M b = 1.06 ± 0.10M ⊙ .

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Section: Introductionmentioning

confidence: 99%

Physical and geometrical parameters of CVBS XI: Cou 1511 (HIP 12552)

Al-Wardat

El-Mahameed

Yusuf

et al. 2016

Res. Astron. Astrophys.

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“…The observations span T ∼ 877 days, a small amount compared to the orbital period of P 1 ∼ 31.528 yr. Covariances between P 1 , e 1 , and a 1 are extremely strong. Using values from Docobo et al (2001), both P 1 (31.528 yr) and e 1 (0.753) are fixed (Q A = 5, Q B = 8). The system distance is assumed to be 72.1 pc from the Hipparcos parallax; combining this with the orbital period and semimajor axis an average component mass of 2.1M ⊙ is computed and these values are used in converting tertiary mass to a 2 .…”

Section: Perseimentioning

confidence: 99%

Limits to Tertiary Astrometric Companions in Binary Systems

Muterspaugh¹,

Lane²,

Kulkarni³

et al. 2006

ApJ

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The Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) has monitored 37 sub-arcsecond binary systems to determine whether their Keplerian orbits are perturbed by faint astrometric companions to either star. Software has been developed to evaluate the regions in a companion mass-period phase space in which the PHASES observations can exclude the possibility of face-on orbit perturbations. We present results for 8 systems for which astrometric companions with masses as small as those of giant planets can be excluded.Comment: Accepted to ApJ, emulateapj 15 page

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“…This paper is the part of a series dedicated to the speckle interferometric observations of visual binaries carried out in recent years by the research team of the R. M. Aller Astronomical Observatory of the University of Santiago de Compostela (Docobo et al 2001(Docobo et al , 2006 in collaboration with the Special Astrophysical Observatory (SAO, Russia). The ultimate goal of these studies is to obtain new orbital parameters and dynamical and individual masses for mostly (but not only) latetype close visual binaries or to improve already existing ones.…”

Section: Introductionmentioning

confidence: 99%

EMCCD SPECKLE INTERFEROMETRY WITH THE 6 m TELESCOPE: ASTROMETRIC MEASUREMENTS, DIFFERENTIAL PHOTOMETRY, AND ORBITS

Docobo

Tamazian

Balega

et al. 2010

The Astronomical Journal

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Results of the EMCCD-based speckle interferometric observations and differential photometry for 46 visual binaries obtained in 2007 June and July with the 6 m telescope of the Special Astrophysical Observatory (Russia) are presented. First preliminary orbits for COU 401, COU 1281, and COU 1037 as well as improved orbits for CHR 137, COU 100, COU 1136, COU 798, CHR 51, CHR 55, COU 315, COU 206, and ADS 13961, along with their dynamical mass estimates, are reported. On the basis of dynamical parallax information, first distance estimates for COU 100, COU 1136, COU 798, COU 206, and COU 1037 are calculated.

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Binary star speckle measurements at Calar Alto. I.

Cited by 11 publications

References 6 publications

Physical and geometrical parameters of CVBS XI: Cou 1511 (HIP 12552)

Physical and geometrical parameters of CVBS XI: Cou 1511 (HIP 12552)

Limits to Tertiary Astrometric Companions in Binary Systems

EMCCD SPECKLE INTERFEROMETRY WITH THE 6 m TELESCOPE: ASTROMETRIC MEASUREMENTS, DIFFERENTIAL PHOTOMETRY, AND ORBITS

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