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@article{37371, author = {Breus, Vitalii and Petrík, Karol and Zoła, Stanisław}, article_number = {4}, doi = {http://dx.doi.org/10.1093/mnras/stz2062}, keywords = {stars: individual: V2306 Cyg; binaries: close; stars: magnetic field; novae; cataclysmic variables}, language = {eng}, issn = {0035-8711}, journal = {Monthly Notices of the Royal Astronomical Society}, title = {Detection of white dwarf spin period variability in the intermediate polar V2306 Cygni}, url = {https://academic.oup.com/mnras/article-abstract/488/4/4526/5545458?redirectedFrom=fulltext}, volume = {488}, year = {2019} }
TY - JOUR ID - 37371 AU - Breus, Vitalii - Petrík, Karol - Zoła, Stanisław PY - 2019 TI - Detection of white dwarf spin period variability in the intermediate polar V2306 Cygni JF - Monthly Notices of the Royal Astronomical Society VL - 488 IS - 4 SP - 4526-4529 EP - 4526-4529 SN - 00358711 KW - stars: individual: V2306 Cyg KW - binaries: close KW - stars: magnetic field KW - novae KW - cataclysmic variables UR - https://academic.oup.com/mnras/article-abstract/488/4/4526/5545458?redirectedFrom=fulltext L2 - https://academic.oup.com/mnras/article-abstract/488/4/4526/5545458?redirectedFrom=fulltext N2 - 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. ER -
BREUS, Vitalii, Karol PETRÍK and Stanisław ZOŁA. Detection of white dwarf spin period variability in the intermediate polar V2306 Cygni. \textit{Monthly Notices of the Royal Astronomical Society}. 2019, vol.~488, No~4, p.~4526-4529. ISSN~0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stz2062.
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