1995/06/01 by David R. Skillman, J. Patterson, J. R. Thorstensen · 1 citation
Physics and Astronomy · Earth and Planetary Sciences · #Astrophysical Phenomena and Observations #High-pressure geophysics and materials #Atomic and Molecular Physics
paper · pdf · doi:10.1086/133590
openalex publication_date 1995/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We report the results of a photometric and spectroscopic campaign on the nova-like variable MV Lyrae in a "high state" during August/September 1993. Radial-velocity observations establish an underlying binary period of 0.1329 ± 0.0004 d, with a remarkably small K-amplitude of 25 ± 4 km/s. The very low K-values for both stars in the binary attest to a very low binary inclination, in the range 10 - 13 degrees. Our photometric data seems to confirm two of the period signals reported by Barisov (1992): quasi-periodic oscillations with a period of 48 minutes, and a slow wave with a period ~3.6 d. On the third signal reported by Borisov, "superhumps" with a period of 0.138 d, our data are less strongly supportive but still tend to favor the existence of the signal. The mass ratio of the binary is 0.43 +0.19 -0.13 , somewhat higher than usually assumed in theoretical studies of superhumps.