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

doi:10.1111/j.1365-2966.2008.13603.x

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

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79 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 language	English
Pages (from-to)	131-140
Number of pages	10
Journal	Monthly Notices of the Royal Astronomical Society
Volume	389
Issue number	1
DOIs	https://doi.org/10.1111/j.1365-2966.2008.13603.x
Publication status	Published - Sept 2008

ASJC Scopus subject areas

Space and Planetary Science

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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

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

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language = "English",

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T1 - Massive stars exploding in a He-rich circumstellar medium - II. The transitional case of SN 2005la

AU - Pastorello, Andrea

AU - Quimby, R.M.

AU - Smartt, Stephen

AU - Mattila, Seppo

AU - Navasardyan, H.

AU - Crockett, Rhonda

AU - Elias-Rosa, N.

AU - Mondol, P.

AU - Wheeler, J.C.

AU - Young, D.R.

PY - 2008/9

Y1 - 2008/9

N2 - 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.

AB - 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.

U2 - 10.1111/j.1365-2966.2008.13603.x

DO - 10.1111/j.1365-2966.2008.13603.x

M3 - Article

SN - 0035-8711

VL - 389

SP - 131

EP - 140

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

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

Abstract

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