Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..335..251r&link_type=abstract
The Light-Time Effect in Astrophysics, Proceedings of ASP Conference Series, Vol. 335, held in Brussels 19-22 July 2004. Edited
Astronomy and Astrophysics
Astrophysics
3
Scientific paper
The orbital period changes of the contact binary AW UMa are investigated, and a secular period decrease of the order of -2.0 × 10-2 s y-1 was detected. It was found that the wave-like shape of the observed period changes of AW UMa can be fitted either with one sinusoidal periodic term of 29 y with amplitude 1.25 × 10-6d, or they could be the result of multiple periodic terms. The latter might not be real, as they correspond to the time interval for which observational data exist as well as to its sub-multiplicities. This might explain the different periodicities proposed up to now for the AW UMa by various investigators, and certainly more data are needed to get reliable results.
Djurasevic Gojko
Kalimeris A.
Rovithis Peter
Rovithis-Livaniou Helen
Tsantilas Sotirios
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