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

Andrea Pastorello, R.M. Quimby, Stephen Smartt, Seppo Mattila, H. Navasardyan, Rhonda Crockett, N. Elias-Rosa, P. Mondol, J.C. Wheeler, D.R. Young

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)131-140
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume389
Issue number1
DOIs
Publication statusPublished - Sep 2008

ASJC Scopus subject areas

  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Massive stars exploding in a He-rich circumstellar medium - II. The transitional case of SN 2005la'. Together they form a unique fingerprint.

  • Cite this

    Pastorello, A., Quimby, R. M., Smartt, S., Mattila, S., Navasardyan, H., Crockett, R., Elias-Rosa, N., Mondol, P., Wheeler, J. C., & Young, D. R. (2008). Massive stars exploding in a He-rich circumstellar medium - II. The transitional case of SN 2005la. Monthly Notices of the Royal Astronomical Society, 389(1), 131-140. https://doi.org/10.1111/j.1365-2966.2008.13603.x