학술논문
Observations of the first confirmed superoutburst of the dwarf nova DDE 39.
Document Type
Article
Author
Source
Subject
*DWARF novae
*LIGHT curves
*CATACLYSMIC variable stars
*LINEAR statistical models
*PHOTOMETRY
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Language
ISSN
0007-0297
Abstract
We present the light curve of the dwarf nova DDE 39 (= 1 RXS ]040253.8+435553) between 2011 October and 2021 January, which reveals two bright outbursts: one in 2018 January and the one in 2020 December which is discussed in this paper. There is also evidence of two fainter outbursts: one in 2012 january and another in 2020 October, reaching magnitude 16.3 and 16.0 respectively. We report digital photometry of the 2020 December outburst. At its brightest, the system reached magnitude 15.1 - about four magnitudes above quiescence - and the event lasted at least 11 days. Superhumps with peak-to-peak amplitude of up to 0.4 magnitudes were present during the outburst, thereby establishing it to be a member of the SU UMa family. The mean superhump period, based on a linear analysis of superhump maxima, was Psh = 0·08176(235)d Period analysis of the superhump signal yields Psh = 0·08199(24)d. [ABSTRACT FROM AUTHOR]