J 2019

Detection of white dwarf spin period variability in the intermediate polar V2306 Cygni

BREUS, Vitalii, Karol PETRÍK and Stanisław ZOŁA

Basic information

Original name

Detection of white dwarf spin period variability in the intermediate polar V2306 Cygni

Authors

BREUS, Vitalii (804 Ukraine), Karol PETRÍK (703 Slovakia, guarantor, belonging to the institution) and Stanisław ZOŁA (616 Poland)

Edition

Monthly Notices of the Royal Astronomical Society, 2019, 0035-8711

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

RIV identification code

RIV/47813059:19240/19:A0000533

Organization unit

Faculty of Philosophy and Science in Opava

DOI

http://dx.doi.org/10.1093/mnras/stz2062

UT WoS

000484349700007

Keywords in English

stars: individual: V2306 Cyg; binaries: close; stars: magnetic field; novae; cataclysmic variables

Tags

, NENI V SCOPUSU, RIVOK

Tags

International impact, Reviewed
Změněno: 21/4/2020 11:37, Ing. Petra Skoumalová

Abstract

V originále

Magnetic cataclysmic variables are close binaries that consist of a compact object - a white dwarf - and a red dwarf filling its Roche lobe. Such systems are physical laboratories that enable study of the influence of magnetic fields on matter flows. They often exhibit spin-up or spin-down of the white dwarf, while some systems exhibit more complex behaviour of the spin period change. We monitor changes of the spin periods of white dwarfs in a sample of close binary systems to study interaction of the magnetic field and accretion processes as well as evolution of intermediate polars. Within the framework of our intermediate polar monitoring program, we obtained photometric CCD observations at several observatories. Two-period trigonometric polynomial fitting was used for determination of extrema timings. The (O-C) analysis was performed to study the variability of the orbital and spin periods of the systems. Using data taken during 9yr of observations of the magnetic cataclysmic variable V2306 Cygni (formerly known as 1WGA J1958.2+3232), we detected the spin period variability that shows a spin-up of the white dwarf with a characteristic time of (53 +/- 5) x 10^(4) yr. The value of the spin period was 733.33976 s with the formal accuracy of 0.00015 s. We derived an improved value of the orbital period of the system to be 4.371523 +/- 0.000009 h.
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