2004A&A...424..993K


Query : 2004A&A...424..993K

2004A&A...424..993K - Astronomy and Astrophysics, volume 424, 993-1002 (2004/9-4)

Spectroscopic and photometric observations of the short-period RS CVn-type star BH Virginis.

KJURKCHIEVA D.P., MARCHEV D.V., HECKERT P.A. and SHOWER C.A.

Abstract (from CDS):

High-resolution spectroscopic observations around the Hα line and BVRI photometry from 1993 to 2003 of the eclipsing short-period RS CVn star BH Vir are presented. The simultaneous solution of our radial velocity curves and light curves yielded the following values for global parameters of the components: M1=1.173±0.006M; M2=1.046±0.005M; R1=1.22±0.05R; R2=1.11±0.04R; i=87.5°±0.8°. The measured rotational broadening of the spectral lines corresponds to equatorial velocities V1=79.8km/s and V2=68.4km/s. Our data reveal considerable Hα emission excess of the two stellar components. We modelled the photometric data to find the size and location of the starspots for each year. The established decreasing trend of the spot latitudes may indicate a latitudinal cycle of at least a decade.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: binaries: eclipsing - stars: binaries: spectroscopic - stars: individual: BH Vir - stars: starspots - stars: chromospheres

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* UV Psc EB* 01 16 55.1192705826 +06 48 42.131128899   9.73 9.01   8.223 G5(N) 248 0
2 V* SV Cam EB* 06 41 19.0820839974 +82 16 02.435978987       9.0   G2IV-V 351 0
3 V* WY Cnc RS* 09 01 55.4509744645 +26 41 22.747100853 10.54 10.34 9.60     G5V 194 0
4 V* XY UMa RS* 09 09 55.9355245408 +54 29 17.725267002       9.620   G5 243 0
5 * bet Vir PM* 11 50 41.7182390 +01 45 52.991019 4.26 4.15 3.60 3.13 2.85 F9V 874 0
6 V* BH Vir RS* 13 58 24.8603932736 -01 39 38.953813515   10.29 9.68   9.047 F6/8V 194 0
7 BD+34 4217 EB* 20 58 13.4533595470 +35 10 29.664154462     10.13     G9.5Ve+K3Ve 258 0
8 HD 200391 Ae* 21 02 25.9068825509 +27 48 26.439773330   7.93 7.374   6.624 G0V+G5V 344 0
9 V* RT And RS* 23 11 10.0981467675 +53 01 33.031477014   9.58 9.043 8.73   F8V+G0-K1-3V 366 0

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2021.09.23-05:18:07

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