Details

Autor(en) / Beteiligte

• Pastorello, A.
• Quimby, R. M.
• Smartt, S. J.
• Mattila, S.
• Navasardyan, H.
• Crockett, R. M.
• Elias-Rosa, N.
• Mondol, P.
• Wheeler, J. C.
• Young, D. R.

Titel

Massive stars exploding in a He-rich circumstellar medium – II. The transitional case of SN 2005la

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2008-09, Vol.389 (1), p.131-140

Ort / Verlag

Oxford, UK: Blackwell Publishing Ltd

Erscheinungsjahr

2008

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present photometric and spectroscopic data of the peculiar SN 2005la, an object which shows an optical light curve with some luminosity fluctuations and spectra with comparably strong narrow hydrogen and helium lines, probably of circumstellar nature. The increasing full width at half-maximum velocity of these lines is indicative of an acceleration of the circumstellar material. SN 2005la exhibits hybrid properties, sharing some similarities with both Type IIn supernovae and 2006jc-like (Type Ibn) events. We propose that the progenitor of SN 2005la was a very young Wolf–Rayet (WN-type) star which experienced mass ejection episodes shortly before core collapse.