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Classical Nova Persei 2018 outburst from the dwarf nova V392 Perстатья
- Авторы: Chochol D., Shugarov S., Hambálek Ľ., Skopal A., Parimucha Š., Dubovský P.
- Сборник: The Golden Age of Cataclysmic Variables and Related Objects V
- Серия: Proceedings of Science (PoS)
- Год издания: 2021
- Место издания: Sissa Medialab srl Partita IVA: 01097780322 Partita
- Первая страница: 29
- Номер статьи: 029
- Аннотация: On 2018, April 29, a bright classical nova (CN) Per 2018 was discovered. Its progenitor is a well-known dwarf nova V392 Per. In this contribution, we analyze UBVRCIC photometry and optical spectroscopy of the CN V392 Per. From the V light curve (LC) we found the brightness decline times t2,V = 3 d, t3,V = 10 d and calculated absolute magnitude of the nova at maximum MVmax = -9.30 ±0.57 using the new MVmax - t3 "universal" decline law and MV15 relations, adopting the Gaia data for CNe. We determined the colour excess EB−V = 0.90±0.09 and distance to the nova d = 3.55±0.6 kpc. The optical spectrum obtained in brightness maximum resembles that of the F2 supergiant. Its bolometric luminosity computed by fitting the continuum by atmospheric and black-body models is in agreement with the luminosity, that we have found from photometry. We estimated the mass of the ONe white dwarf in V392 Per as Mwd = 1.21 M⊙. The CN Per 2018 can be classified as a fast super-Eddington nova with an outburst LC of plateau type. Nova displayed He/N spectrum classification, large expansion velocities, and triple-peaked emission-line profiles during the decline, explained by equatorial ring seen nearly face on and a bipolar flow aligned almost with the line of sight. The post maximum spectra of CN Per 2018 and available radio data were used to estimate the inclination angle of the system as i∼ 9∘. The difference in intensity of redward and blueward emission bumps is possible to explain by about 1.5 times higher density of the receding outtflow. The rapid increase of the bipolar outflow radial velocities by ∼300 km/s around day 5 after the maximum was caused by the fast bipolar winds from the burning white dwarf after shrinking of its pseudophotosphere.
- Добавил в систему: Шугаров Сергей Юрьевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | GOLDEN2019_029.pdf | 1,5 МБ | 27 ноября 2021 [s_shugarov] |