ASASSN-22dl: new WZ Sge-type dwarf nova with large-amplitude early superhumps

Kyoto Univ. team observed ASASSN-22dl on 16th March.

Combining with the data from Itoh-san on 15th,

we obtained the double-peaked variation with the period of 0.05259(2) or 0.05555(2) d (alias)

and the mean amplitude of 0.5 mag.

Judging from its period and phase-averaged profile, I conclude that ASASSN-22dl is a new WZ Sge-type dwarf nova with a large amplitude early superhump.

Also, the quiescence data of ZTF showed a possible variation with the period of 0.052673(1) d and with the double-peaked profile.

Further observations are encouraged!

Best,

Yusuke

2022年3月16日(水) 8:55 Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>:

ASASSN-22dl: superhump or early superhump?

Itoh-san detected large variations up to 0.8 mag.
There were two maxima in one cycle and the profile
suggest either an early superhump or superhump + eclipse.
The period was around 0.054 d. Further observations
are encouraged.

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Kyoto University, Graduate School of Department of Astronomy, PhD student

Yusuke TAMPO

MAIL: tampo@kusastro.kyoto-u.ac.jp

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