2010A&A...519A..78Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET22:49:05

2010A&A...519A..78Z - Astronomy and Astrophysics, volume 519, A78-78 (2010/9-1)

The triple system KR Comae Berenices.

ZASCHE P. and UHLAR R.

Abstract (from CDS):

We present the detailed analysis of triple system KR Com with different observational techniques - photometry, interferometry, and period variation. The use of BVR photometry of the close-contact binary KR Com, which is the primary component of a triple system, helps us to better describe the properties of the components. The interferometric data obtained during the last 30 years sufficiently determine the visual orbit, but the use of minima timings of KR Com for the study of period variation together with the visual orbit is a novel approach in this system. Basic physical parameters resulting from the light curve analysis agree well with the previous results from spectroscopy. The temperatures for the primary and secondary component resulted in 5549 and 6072K, respectively, and the amount of the third light in all filters is about 1/3 of the total luminosity. The distant third component revolves around the common barycenter on 11yr orbit with a very high eccentricity (0.934) and this movement is also detectable via the period variation, which is clearly visible in the O-C diagram of times of minima observations. The use of minima times for the combined analysis helps us to independently determine the distance to the system (64.02±9.42pc) and also to confirm the orientation of the orbit in space. New minima observations and also spectroscopy would be very profitable, especially during the next periastron passage in the year 2017.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - binaries: visual - stars: fundamental parameters - stars: individual: KR Com

VizieR on-line data: <Available at CDS (J/A+A/519/A78): bmag.dat rmag.dat vmag.dat>

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * zet Phe Al* 01 08 23.0814982 -55 14 44.728914   3.908 4.014     B6V+B9V 217 0
2 V* KR Com WU* 13 20 15.7810787983 +17 45 57.006297145   7.72 7.207   6.604 F5 79 1
3 HD 115981 PM* 13 20 25.7056352311 +17 34 50.217384243 7.630 7.690 7.300     F2V 27 0
4 HD 116206 * 13 21 48.68015 +17 45 55.7457   8.13 7.81     F0 27 0
5 * i Boo EB* 15 03 47.29565 +47 39 14.6228   5.41 4.76     G0Vn 522 0
6 V* V819 Her Al* 17 21 43.6153979332 +39 58 28.658827060   6.222 5.561     F7V 164 0
7 HD 165590 EB* 18 05 49.6819035061 +21 26 45.389410339   7.716 7.096     G0V+G5V 219 0
8 V* QS Aql Al* 19 41 05.5283099 +13 48 56.450213   5.907 5.996     B5V 142 1
9 V* V505 Sgr Al* 19 53 06.3822777147 -14 36 11.478076816   6.62 6.48     A2IV-V 198 0
10 V* VW Cep EB* 20 37 21.6248469581 +75 36 01.889162699   8.13   7.0   G8V+K0V 520 0

    Equat.    Gal    SGal    Ecl

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2020.02.17-22:49:05

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