Оптические наблюдения сверхновой IIP 2004dj: Свидетельство асимметрии выброса ^{56}Niстатья
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Статья опубликована в журнале из перечня ВАК
Дата последнего поиска статьи во внешних источниках: 19 июля 2013 г.
Аннотация:The photometric and spectroscopic observations of nearby type IIP supernova 2004dj are presented. The ^{56}Ni mass estimated from the light curve is ~0.02 M_sol. This estimate is found to be consistent with the H$\alpha$ luminosity. SN2004dj reveals a strong asymmetry of the H-alpha emission line at the nebular epoch with the shift of the maximum of -1600 km s-1. A similar asymmetric component is detected in H$\beta$, [O I] and [Ca II] lines. The line asymmetry is interpreted as a result of the asymmetry of ^{56}Ni ejecta. The H-alpha profile and its evolution are reproduced in the model of the asymmetric bipolar ^{56}Ni and spherical hydrogen distributions. The mass of the front ^{56}Ni jet is comparable to the central component and twice as larger compared to the rear ^{56}Ni jet. We note that the asymmetric bipolar structure of of ^{56}Ni ejecta is revealed also by SN1999em, another type IIP supernova.