Talk detail

Participant	Dereli, Hüsne
Institution	INAF - Capodimonte Astronomical Observatory, Naples - ICRANet, Pescara, Italy - Salita Moiariello - Naples - 16 - Turkey

Session	SN3	Accepted	No	Order	991	Time
Talk	Poster abstract	Title	Photometric and spectroscopic evolution of SN 2004ex (IIb)
Co-authors	Massimo Della Valle, Maria Teresa Botticella, Massimo Dall'Ora, Stefano Valenti
Abstract	The progenitors of core-collapse supernovae (CC SNe) are massive stars, either single or in binary system, that complete the eso-energetic nuclear burnings, up to be development of an iron core that cannot be supported by any further nuclear fusion reactions or by electron degenerate pressure. Different types of CC SNe have been identified on the basis of their spectroscopic and photometric properties with a sequence ( IIP, IIL, Ib, Ic )explained on the basis of the progenitor mass loss history. However several SNe with characteristics intermediate between these types have been recently discovered suggesting a smooth transition and requiring the introduction of hybrid classes (for example type IIb SNe). We present the photometric and spectroscopic evolution of SN 2004ex a type IIb SN exploded in NGC 182 that shows both He I lines and relatively faint H_alpha, all with P-Cyg profiles.