2000A&A...364..543D


Query : 2000A&A...364..543D

2000A&A...364..543D - Astronomy and Astrophysics, volume 364, 543-551 (2000/12-2)

Long-term activity of the eclipsing binary AB Andromedae.

DJURASEVIC G., ROVITHIS-LIVANIOU H. and ROVITHIS P.

Abstract (from CDS):

In the present study, the activity of the eclipsing binary AB And is examined by analysing the photometric data covering the period from 1968 till 1995. The light curves corresponding to this period show significant differences and asymmetries, which are especially conspicuous in the height of the light-curve maxima and in the part following the secondary maximum as well as in the depth of the primary light-curve minimum. To explain the light asymmetries and variations, we used a model that involves spotted regions on the components. The analysis shows that AB And is in overcontact configuration (fover∼15%). The Roche model with single spotted areas on both components yields a good fit of the observations for the whole set of the analysed light curves without any changes of the basic system's parameters. This indicates that the complex nature of the light-curve variations during the examined period can be almost completely explained by the development and motion of the spotted areas on the components. According to the obtained results the spotted areas are probably formed at high latitudes and cover a significant part of the stellar surface; the change of their locations and sizes with time is examined.

Abstract Copyright:

Journal keyword(s): stars: binaries: close - stars: binaries: eclipsing - stars: individual: AB And - stars: starspots

Simbad objects: 2

goto View the references in ADS

Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* AB And EB* 23 11 32.0859315024 +36 53 35.108950344   10.62 9.50     G5+G5V 259 0
2 BD+35 4972 * 23 11 40.2128304984 +36 40 10.955318124   10.81 9.97     K0 9 0

To bookmark this query, right click on this link: simbad:objects in 2000A&A...364..543D and select 'bookmark this link' or equivalent in the popup menu


2022.06.27-17:16:14

© Université de Strasbourg/CNRS

    • Contact