A growth of early superhump: Multi color observation of the WZ Sge star TCP J23580961+5502508
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914574957019136 |
|---|---|
| author | Sazaki, Ryosuke Uemura, Makoto Nakaoka, Tatsuya Imazawa, Ryo |
| author_facet | Sazaki, Ryosuke Uemura, Makoto Nakaoka, Tatsuya Imazawa, Ryo |
| contents | We report optical and near-infrared photometry of a WZ Sge-type dwarf nova, TCP J23580961+5502508, during its 2022 superoutburst, obtained using the 1.5-m Kanata telescope. Our observation detected early superhumps on three consecutive nights which included the rising phase toward the peak of the outburst. The early superhumps exhibited a profile dominated by the primary maximum during the first two days, while a prominent secondary minimum appeared on the third day. We reconstructed the structure of the accretion disk from multi-color light curves using the early superhump mapping. The accretion disk has a prominent flaring structure on the leading side of the disk during the first two days. An additional flaring structure emerged on the opposite side on the third day, forming a two-armed pattern that can be interpreted within the framework of the 2:1 resonance model. The reconstructed disk structure in the first two days suggests the presence of an additional mechanism operating during the initial stage of early superhump development. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_17258 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A growth of early superhump: Multi color observation of the WZ Sge star TCP J23580961+5502508 Sazaki, Ryosuke Uemura, Makoto Nakaoka, Tatsuya Imazawa, Ryo Solar and Stellar Astrophysics We report optical and near-infrared photometry of a WZ Sge-type dwarf nova, TCP J23580961+5502508, during its 2022 superoutburst, obtained using the 1.5-m Kanata telescope. Our observation detected early superhumps on three consecutive nights which included the rising phase toward the peak of the outburst. The early superhumps exhibited a profile dominated by the primary maximum during the first two days, while a prominent secondary minimum appeared on the third day. We reconstructed the structure of the accretion disk from multi-color light curves using the early superhump mapping. The accretion disk has a prominent flaring structure on the leading side of the disk during the first two days. An additional flaring structure emerged on the opposite side on the third day, forming a two-armed pattern that can be interpreted within the framework of the 2:1 resonance model. The reconstructed disk structure in the first two days suggests the presence of an additional mechanism operating during the initial stage of early superhump development. |
| title | A growth of early superhump: Multi color observation of the WZ Sge star TCP J23580961+5502508 |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2605.17258 |