V404 Andromedae – Observations and Analysis |
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| Institution: | 2. Desert Blooms Observatory, (31° 56.466′ N, 110° 15.419′ W), Benson, AZ, United States;3. Guest User, Canadian Astronomy Data Centre, which is operated by the Dominion Astrophysical Observatory for the National Research Council of Canada''s Herzberg Institute of Astrophysics;4. West Challow Observatory, OX12 9TX, United Kingdom;2. Desert Blooms Observatoery, Benson, AZ (31° 56.466′ N, 110° 15.419′ W) |
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| Abstract: | The first radial velocity curves for V404 And have been obtained. Combined with new light curve data, simultaneous Roche-based light curve analyses have been carried out using the 2003 version of the Wilson-Devinney code. New values for the masses, radii, and luminosities have been obtained: M1 = 0.870 (11) M ?, M 2 = 0.706 (9) M ?, R1 = 1.10 (13) R?, R2 = 1.37 (13) R?, L1 = 0.75 (7) L ?, and L 2 = 0.87 (8) L ?. Reference to the sample of close binary stars from Yakut and Eggleton (2005) and the ZAMS indicates that both stars are evolved. Further, the system may have been a classical Algol in the past but with the secondary then contracting, yielding the near semi-contact binary that we have today. |
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