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

2008/01/31 by A. Pastorello, R. M. Quimby, S. J. Smartt +8 · 4 citations
Physics and Astronomy · #Astro and Planetary Science #Astronomy and Astrophysical Research #Circumstellar envelope #Emission spectrum #Gamma-ray bursts and supernovae #Helium #Light curve #Luminosity #Optical spectra #Spectral line #Stars #Supernova #astro-ph

paper · pdf · doi:10.1111/j.1365-2966.2008.13603.x

9 pages, including 6 figures and 4 tables. Minor corrections, 1 figure added. Accepted for publication in MNRAS

arxiv created 2008/06/19 · openalex publication_date 2008/07/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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.

Citations

• The circumstellar material around SN IIn 1997eg: another detection of a very narrow P Cygni profile
• SN 2005ap: A Most Brilliant Explosion
• On the Progenitor of SN 2005gl and the Nature of Type IIn Supernovae
• SN 1988Z: spectro-photometric catalogue and energy estimates
• Supernova 2002ic: The Collapse of a Stripped-Envelope, Massive Star in a Dense Medium?
• A giant outburst two years before the core-collapse of a massive star
• SN 2006jc: A Wolf-Rayet Star Exploding in a Dense He-rich Circumstellar Medium
• Luminous blue variables as the progenitors of supernovae with quasi-periodic radio modulations
• The Type IIn supernova 1994W: evidence for the explosive ejection of a circumstellar envelope

Cited by

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• SN 2020bqj: A Type Ibn supernova with a long-lasting peak plateau
• Analyzing the Largest Spectroscopic Data Set of Hydrogen-poor Super-luminous Supernovae
• Circumstellar interaction in type Ibn supernovae and SN 2006jc