Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-06-27
Astrophys.Space Sci. 288 (2003) 327-339
Astronomy and Astrophysics
Astrophysics
7 pages, 9 figures, submitted to Astronomy & Astrophysics
Scientific paper
10.1023/B:ASTR.0000006056.17119.
The time evolution behaviour of the superhumps of the dwarf nova 1RXS J232953.9+062814 is investigated with the wavelet analysis method. On the basis of two nights CCD photometry performed during its first superoutburst as well as other published brightness data, we reveal the superhump's time-dependence as a function of periods and time. Our light curves, which phased in the rapid decay ending portion of the superoutburst and in the dawn of a following normal outburst, are important to help trace the superhump evolution for the star. Evident amplitude variations of the superhumps, reflecting the fading of outbursts, are detected. The general profile of brightness fading over the outbursts roughly followed an exponential decay law or a form of a five-order polynomial. Both the superhump period and the orbital period of the binary system are detected in the present data. We obtain P_sh=0.04575(5) d and P_orb=0.04496(5) d. They agree with the existing values based on additional data. The two periods exchanged their roles during the superhump evolution.
Qiu Y.-L.
Zhou Ai-Ying
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