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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

488

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

4

Strana od-do

4526-4529

Kód UT WoS článku

000484349700007

EID výsledku v databázi Scopus

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