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Spectroscopy of the Nova Sagitarii 2012 (PNV J17452791-2305213)статья
- Авторы: Esipov V.F., Sokolovsky K.V., Korotkiy S.A.
- Журнал: The Astronomer’s Telegram
- Номер: 4094
- Год издания: 2012
- Первая страница: 1
- Последняя страница: 1
- Аннотация: Nova Sagitarii 2012 (CBET #3089; ATel #4061, #4088, #4093) was observed spectroscopically with the 1.25m ZTE telescope of the Crimean Laboratory, Moscow State University. Three intermediate resolution spectra (R=2000) covering the range 4000-9000A were obtained on April 24.04, 26.01, and 27.03 UT (3, 5 and 6 days after the explosion). All spectra are dominated by broad H_alpha, H_beta and OI emission corresponding to expansion velocities up to 6500km/s. The estimated expansion velocities are slightly larger than those reported on April 23 and 25 by C. Buil and K. Imamura (CBET #3089). The presence of H_gamma and HeII 4686 lines is evident in the April 26 spectrum. Detection of HeII emission together with the flat-top shape of emission lines, high expansion velocity and rapid lightcurve evolution allows one to classify the object as a fast He/N type nova (Williams 1992, AJ, 104, 725). URL: http://www.astronomerstelegram.org/?read=4094
- Добавил в систему: Есипов Валентин Федорович