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Long-term activity of QU Car
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SYSNO ASEP 0480922 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Long-term activity of QU Car Tvůrce(i) Šimon, Vojtěch (ASU-R) ORCID, RID Zdroj.dok. Astronomische Nachrichten. - : Wiley - ISSN 0004-6337
Roč. 338, č. 6 (2017), s. 696-699Poč.str. 4 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova novae ; cataclysmic variables ; accretion disks Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) Institucionální podpora ASU-R - RVO:67985815 UT WOS 000408308300006 EID SCOPUS 85022180828 DOI 10.1002/asna.201713316 Anotace This paper presents an analysis of the long-term activity of the cataclysmic variable (CV) QUCar using CCD (charge-coupled device) V-band ASAS (All Sky Automated Survey) data, obtained between 2001 and 2009. I show that the evolution of brightness on the timescale of weeks and months (not from night to night) dominates the light curve during this mapped time. The histograms of brightness are not consistent with the normal distribution and show that the character of the light curve changes for the individual years, although the mean brightness remains similar. One episode of an exceptionally bright state displayed a return accompanied by a series of strong fluctuations of brightness. This shows that the amplitude of the brightness variations changes from time to time, and it does not always depend on the mean level of brightness. This analysis of QUCar thus shows the type of the long-term activity in a CV with a very high mass transfer rate. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2018
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