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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F19%3AA0000533" target="_blank" >RIV/47813059:19240/19:A0000533 - isvavai.cz</a>

Result on the web

<a href="https://academic.oup.com/mnras/article-abstract/488/4/4526/5545458?redirectedFrom=fulltext" target="_blank" >https://academic.oup.com/mnras/article-abstract/488/4/4526/5545458?redirectedFrom=fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stz2062" target="_blank" >10.1093/mnras/stz2062</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Volume of the periodical

488

Issue of the periodical within the volume

4

Country of publishing house

GB - UNITED KINGDOM

Number of pages

4

Pages from-to

4526-4529

UT code for WoS article

000484349700007

EID of the result in the Scopus database

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