naa a22 4500 51079033X CHVBK 20180411083317.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1134/S1063773713040051 doi (NATIONALLICENCE)springer-10.1134/S1063773713040051 Constraints on accretion column parameters for the intermediate polar LS Pegasi from the power spectrum of its optical light curve [Elektronische Daten] [A. Semena, M. Revnivtsev, I. Khamitov, R. Burenin, T. Ak, Z. Eker, M. Pavlinsky] The properties of the hot zone in the accretion flow near the surface of a magnetized white dwarf have been studied. For this purpose, the aperiodic optical variability of LS Peg, one of the brightest intermediate polars in the northern sky, has been investigated. The main radiation of the hot zone, which is then reemitted in the optical band, results from the radiation of an optically thin plasma heated during the passage of the accretion flow of a standing shock. Recently, Semena and Revnivtsev (2012) have shown that the aperiodic variability (flickering) of accreting magnetized white dwarfs should have a characteristic feature in the range of Fourier frequencies corresponding to the plasma cooling time in this hot region. The photometric brightness measurements for LS Peg made with the RTT-150 telescope using a high-speed ANDOR iXon CCD array have allowed the break frequency in the power spectrum of the source's variability to be constrained. Constraints on the geometry of the accretion column for the white dwarf in LS Peg and on the plasma parameters in it have been obtained. Pleiades Publishing, Ltd., 2013 low-mass X-ray binaries nationallicence accretion nationallicence thermal instability in accretion column nationallicence Semena A. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut Revnivtsev M. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut Khamitov I. TUBITAK National Observatory, 07058, Antalya, Turkey aut Burenin R. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut Ak T. Scientific Faculty, Department of Astronomy and Space Science, Istanbul University, Istanbul, Turkey aut Eker Z. TUBITAK National Observatory, 07058, Antalya, Turkey aut Pavlinsky M. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut Astronomy Letters SP MAIK Nauka/Interperiodica 39/4(2013-04-01), 227-236 1063-7737 39:4<227 2013 39 11443 https://doi.org/10.1134/S1063773713040051 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063773713040051 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Semena A. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut NATIONALLICENCE 700 1- Revnivtsev M. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut NATIONALLICENCE 700 1- Khamitov I. TUBITAK National Observatory, 07058, Antalya, Turkey aut NATIONALLICENCE 700 1- Burenin R. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut NATIONALLICENCE 700 1- Ak T. Scientific Faculty, Department of Astronomy and Space Science, Istanbul University, Istanbul, Turkey aut NATIONALLICENCE 700 1- Eker Z. TUBITAK National Observatory, 07058, Antalya, Turkey aut NATIONALLICENCE 700 1- Pavlinsky M. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut NATIONALLICENCE 773 0- Astronomy Letters SP MAIK Nauka/Interperiodica 39/4(2013-04-01), 227-236 1063-7737 39:4<227 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer