2020/01/30 by Ts. B. Georgiev, R. Zamanov, Georgiev, Ts. B. +17
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #FOS: Physical sciences #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research #Solar and Space Plasma Dynamics #Solar and Stellar Astrophysics (astro-ph.SR)
paper · pdf · doi:10.48550/arxiv.2001.11290
openalex publication_date 2020/01/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the photometric behavior of the recurrent nova RS Oph by 58\nmonitoring light curves (LCs), taken by 5 telescopes. All LCs show repeating\ntime structures with some quasi-periods (QPs) in time scales from minutes to\nhours. In our previous work 97 QPs were detected in the LCs by local minimums\nof structure functions and local maximums of auto-correlation functions. The\ndistribution of the QPs shows modes at 8, 13, 21, 30, 48 and 73 min, where the\nmode at 8 min is poorly unveiled. These modes follow a power function with base\n1.55\≈ 3/2 with standard deviation 4.7%. This function predicts modes\nalso at 5.3 and 3.5 min, which are not detected in the full MLCs. In the\npresent work we analyze simple small parts from high resolution LCs. We confirm\nthe QPs modes at 8.0, 5.3 and 3.5 min. Generally, we found 8 QP modes with\nregular logarithmic distribution in the time interval 3.5-73 min. We also show\ntypical intra-night evolutions of QP modes in the minute scale -- sharp or\ngradual transitions from one QP mode to other. In the end we find that the\nparts of the LCs carry out the properties of the whole LCs at short time scale.\nThis lead to two well pronounces dependences - between the range deviation and\nstandard deviation of the LC, as well as between the quasi-period and the\nrelevant level of the density function of the LC.\n