Source: https://www.degruyter.com/view/j/astro.2010.19.issue-3-4/astro-2017-0423/astro-2017-0423.xml?format=INT
Timestamp: 2019-04-21 08:29:48+00:00

Document:
A problem with the analysis of type Ia supernovae by Crawford, David F.
Model of the Galaxy with Hot Dark Matter by Khokhlov, Dmitri L.
Features of globular cluster’s dynamics with an intermediate-mass black hole by Ryabova, Marina V./ Gorban, Alena S./ Shchekinov, Yuri A. and Vasiliev, Evgenii O.
ε-mechanism driven pulsations in hot subdwarf stars with mixed H-He atmospheres by Battich, Tiara/ Bertolami, Marcelo M. Miller/ Córsico, Alejandro H. and Althaus, Leandro G.
The Pulkovo Spectrophotometry Catalog of Bright Stars in the Range from 320 to 1080 Nm by Alekseeva, G. A./ Arkharov, A. A./ Galkin, V. D./ Hagen-Thorn, E. I./ Nikanorova, I. N./ Novikov, V. V./ Novopashenny, V. B./ Pakhomov, V. P./ Ruban, E. V. and Shchegol, D. E.
Hierarchical structure of the interstellar molecular clouds and star formation by Dudorov, Alexander E. and Khaibrakhmanov, Sergey A.
Photometric systems and stellar parameters by Straižys, V.
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.
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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