2002A&A...387..162Y


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST17:59:22

2002A&A...387..162Y - Astronomy and Astrophysics, volume 387, 162-168 (2002/5-3)

CCD photometric study of the short period contact binary CE Leonis.

YANG Y. and LIU Q.

Abstract (from CDS):

Light curves and photometric solutions of the contact binary CE Leo are presented in this paper. The light curves appear to exhibit a typical O'Connell effect, with Maximum I being 0.045 mag (V) and 0.048 mag (B) brighter than Maximum II, respectively, and Maximum I shifting to phase 0.26. The new light curve and those published by Samec et al. (1993AJ....106..318S) show the change in shape of the light curves of the system. From 1989 to 2001, the difference in the depths between the primary and secondary eclipses increased by 0.100mag (V) and 0.113mag (B). The orbital period of the system oscillates with a cycle of about 14 years and a semi-amplitude of 0.004 days. The light curves are analyzed by means of the latest version of the Wilson-Devinney code. The results show that CE Leo is a W-subtype contact binary with a ratio q=0.501. The asymmetry of the light curves is explained by star spot models. Variations in temperature of the spot on the primary component may be responsible for the light curve variation of the system. The cyclical period change can most probably be attributed to a magnetic activity cycle in the primary component.

Abstract Copyright:

Journal keyword(s): stars: binaries: eclipsing - stars: magnitic fields - starspots

Simbad objects: 7

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Number of rows : 7

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 HD 23161 * 03 42 46.5699044984 -02 21 38.664035825   9.780 9.36     F2V 11 0
2 V* V624 Tau dS* 03 43 43.2418015652 +24 22 28.449807684   8.49 8.22     A7V 114 0
3 V* V969 Tau BY* 03 45 42.1185203606 +24 54 21.622880032   10.18 9.56   8.82 G0V 115 1
4 HD 23731 * 03 48 18.9368892825 +26 35 21.016011591   9.13 7.98     K2 9 0
5 TYC 1985-1274-1 * 11 44 01.6466310147 +23 22 37.901076870   12.68 12.56     ~ 4 0
6 TYC 1985-265-1 ** 11 44 07.0683 +23 17 49.591   12.65 12.29 11.37   ~ 4 0
7 V* CE Leo EB* 11 44 24.2553681651 +23 21 22.850397594     12.39     K 82 0

    Equat.    Gal    SGal    Ecl

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2020.10.24-17:59:22

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