2001A&A...371..997P


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET07:21:31

2001A&A...371..997P - Astronomy and Astrophysics, volume 371, 997-1011 (2001/6-1)

An active binary XY UMa revisited.

PRIBULLA T., CHOCHOL D., HECKERT P.A., ERRICO L., VITTONE A.A., PARIMUCHA S. and TEODORANI M.

Abstract (from CDS):

New extensive multicolour photoelectric photometry, performed since 1994, is presented. 17 more-or-less complete light curves were obtained and analyzed. The Wilson-Devinney code applied to the BVRI light curves without the maculation effect together with published spectroscopic mass ratio and semi-major axis yielded new absolute parameters of the eclipsing pair: m1=1.10M, m2=0.66M, R1=1.16R, R2=0.63R, a=3.107R and the orbital inclination i=80.9°. The observed orbital period changes are conclusively explained by the mutual action of the third body in the system (P3=30 years) and the maculation effects. Simultaneous analysis of the period changes and the visual brightness excludes the possibility of their explanation by Applegate's mechanism. The differences in the maxima heights caused by the maculation exhibit variations with the period of 709±10 days. The distance to the system d=86±5pc determined from the absolute dimensions and luminosities of the components is larger than the Hipparcos astrometric value d=66±6pc.

Abstract Copyright:

Journal keyword(s): stars: binaries eclipsing - stars: individual: XY UMa - stars: pre-main sequence - stars: magnetic fields

CDS comments: Table 1: designation 'NN' in column (1) not in SIMBAD. GSC 167-3805 is a misprint for GSC 3805-167

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 V* SV Cam Al* 06 41 19.0820839974 +82 16 02.435978987       9.0   G2IV-V 347 0
2 NGC 2632 OpC 08 40 24 +19 40.0           ~ 1261 0
3 BD+55 1314 * 09 07 23.0383439354 +54 30 59.612949267   10.44 9.43     ~ 2 0
4 HD 237784 * 09 09 31.0372919357 +54 23 46.331645958   9.99 9.52     F5 25 0
5 TYC 3805-167-1 * 09 09 41.9022383678 +54 19 40.804425835   11.11 10.60     ~ 3 0
6 V* XY UMa RS* 09 09 55.9355245408 +54 29 17.725267002       9.620   G5 240 0
7 HD 237788 * 09 10 13.8627264401 +54 28 10.023743599   10.23 9.73     F8 7 0
8 HD 78414 * 09 10 24.1182658279 +54 41 12.833262718   9.63 9.48     A 4 0
9 V* AW UMa WU* 11 30 04.3159101276 +29 57 52.677255375   7.27   6.7   F0 267 1
10 V* RT And RS* 23 11 10.0981467675 +53 01 33.031477014   9.58 9.043 8.73   F8V+G0-K1-3V 364 0

    Equat.    Gal    SGal    Ecl

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2020.10.28-07:21:31

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