Ten CORAVEL spectroscopic binary orbits of evolved stars
نویسنده
چکیده
On the basis of Coravel observations, we present orbital parameters for 10 spectroscopic-binary systems including an evolved star, namely HD 13530, HD 28591, HD 47415, HD 78414, HD 123999, HD 153751, HD 174881, HD 179094, HD 212280 and HD 217188. The most significant result is related to HD 13530, for which we have found an orbital period of 1575.48±1.63 days and an eccentricity of 0.8815. Such an eccentricity value is the largest one known up to date for a single-lined spectroscopic binary with a giant component. The other spectroscopic orbits described in this paper principally confirm with independent data previously obtained orbital solutions except HD 179094 for which the double-lined status was still unknown.
منابع مشابه
A CORAVEL radial - velocity monitoring of giant Ba and S stars : spectroscopic orbits and intrinsic variations ( I ) ⋆
With the aim of deriving the binary frequency among Ba and S stars, 56 new spectroscopic orbits (46 and 10, respectively) have been derived for these chemicallypeculiar red giants monitored with the CORAVEL spectrometers. These orbits are presented in this paper (38 orbits) and in a companion paper (Udry et al. 1998, Paper II; 18 orbits). The results for 12 additional long-period binary stars (...
متن کاملInvestigation of the Praesepe cluster ⋆
Coravel observations of 103 F5-K0 stars in the Praesepe cluster yielded 24 spectroscopic binaries (3 are non-members), and 20 orbits were determined, with periods from 4 to 7400 days. Based on a complete sample in the colour range 0.40 ≤ B − V ≥ 0.80 (80 stars, including KW 244 = TX Cnc), the companion star fraction CSF = 0.45. The percentage of spectroscopic binaries with P < 1000. d is 20% (1...
متن کاملInvestigation of the Praesepe Cluster Iii. Radial Velocity and Binarity of the F5-k0 Klein-wassink Stars
Coravel observations of 103 F5-K0 stars in the Praesepe cluster yielded 24 spectroscopic binaries (3 are non-members), and 20 orbits were determined, with periods from 4 to 7400 days. Based on a complete sample in the colour range 0.40 ≤ B − V ≥ 0.80 (80 stars, including KW 244 = TX Cnc), the companion star fraction CSF = 0.45. The percentage of spec-troscopic binaries with P < 1000. d is 20% (...
متن کاملVelocity curve analysis of spectroscopic binary stars EQ Tau, V376 And, V776 Cas, V2377 Oph and V380 Cygni by nonlinear regression
Using measured radial velocity data of five double-lined spectroscopic binary systems EQ Tau, V376 And, V776 Cas, V2377 Oph and V380 Cygni, we find corresponding orbital and spectroscopic elements via the method introduced by Karami & Teimoorinia and Karami & Mohebi. Our numerical results are in good agreement with those obtained by others using more traditional methods.
متن کاملInvestigation of the Pleiades cluster ? , ? ? III . Additional corona members
The analysis of CORAVEL radial velocities of 93 stars selected on the basis of their proper motion and Geneva CCD photometric observations for 57 stars have permitted to identify 25 new members in the outer part of the Pleiades. Several spectroscopic binaries have been discovered, but their membership is not clear. Two orbits with short periods have been determined, but both stars are probably ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999