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2005AJ....130..224Q - Astron. J., 130, 224-233 (2005/July-0)
Deep, low mass ratio overcontact binary systems. III. CU Tauri and TV Muscae.
QIAN S.-B., YANG Y.-G., SOONTHORNTHUM B., ZHU L.-Y., HE J.-J. and YUAN J.-Z.
Abstract (from CDS):
Meanwhile, the photoelectric light curves in the B, V, R, and I bands of TV Muscae published by Hilditch and coworkers were reanalyzed with the 2003 version of the W-D code. It is shown that the low mass ratio binary turns out to be a deep overcontact system with f=74.3%±11.3%. A period analysis with all collected times of light minimum revealed a combination of a long-term period decrease (dP/dt=-2.16x10–7 days/yr) and a possible cyclic change with a period of 29.1 yr. The rapid long-term period decreases of both systems can be explained as a combination of the mass transfer from the more massive component to the less massive one and the angular momentum loss due to mass outflow from the L2 point. In that way, the overcontact degrees of the two systems will become deeper as their periods decrease, and finally they will evolve into a single rapid-rotation star. However, for CU Tau, the rate of the secular period decrease is very large when compared with the other systems of the same type. This suggests that the long-term period decrease may be part of a long-period periodic change, which we need more data to check.
Abstract Copyright: ∼
Journal keyword(s): Stars: Binaries: Close - Stars: Binaries: Eclipsing - Stars: Evolution - Stars: Individual: Constellation Name: CU Tauri - Stars: Individual: Constellation Name: TV Muscae
Simbad objects: 24
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