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formerly Baltic Astronomy

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Volume 19, Issue 3-4


High Velocity Spectroscopic Binary Orbits from Photoelectric Radial Velocities: BD+20 5152, a Possible Triple System

J. Sperauskas
  • Corresponding author
  • Vilnius University Observatory, Čiurlionio 29, Vilnius, LT-03100, Lithuania
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ A. Bartkevičius
  • Institute of Theoretical Physics and Astronomy, Vilnius University, Goštauto 12, Vilnius, LT-01108, Lithuania
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ R. P. Boyle
  • Vatican Observatory Research Group, Steward Observatory, Tuscon, AZ 85721, United States of America
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ V. Deveikis
Published Online: 2017-04-19 | DOI: https://doi.org/10.1515/astro-2017-0423


The spectroscopic orbit of a high proper motion star, BD+20 5152, is calculated from 34 CORAVEL-type radial velocity measurements. The star has a slightly eccentric orbit with a period of 5.70613 d, half-amplitude of 47.7 km/s and eccentricity of 0.049. The center-of-mass velocity of the system is -24.3 km/s. BD+20 5152 seems to be a triple system consisting of a G8 dwarf as a primary component and of two K6-M0 dwarfs as secondary and tertiary components. This model is based on the analysis of its UBVRI and JHK magnitudes. According to the SuperWASP photometry, spots on the surface of the primary are suspected. The excessive brightness in the Galex FUV and NUV magnitudes and a non-zero eccentricity suggest the age of this system to be less than 1 Gyr.

Keywords: stars; binaries; spectroscopic; individual (BD+20 5152)


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About the article

Received: 2010-01-21

Published Online: 2017-04-19

Published in Print: 2010-12-01

Citation Information: Open Astronomy, Volume 19, Issue 3-4, Pages 225–234, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0423.

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© 2017. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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