Massive stars exploding in a He-rich circumstellar medium – II. The transitional case of SN 2005la
Corresponding Author
A. Pastorello
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
E-mail: [email protected]
Present address: California Institute of Technology, Pasadena, CA 91125, USA.
Search for more papers by this authorCorresponding Author
R. M. Quimby
Department of Astronomy, University of Texas, Austin, TX 78712, USA
E-mail: [email protected]
Present address: California Institute of Technology, Pasadena, CA 91125, USA.
Search for more papers by this authorS. J. Smartt
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
Search for more papers by this authorS. Mattila
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland
Search for more papers by this authorH. Navasardyan
INAF Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Search for more papers by this authorR. M. Crockett
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
Search for more papers by this authorN. Elias-Rosa
INAF Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching bei München, Germany
Search for more papers by this authorP. Mondol
Department of Astronomy, University of Texas, Austin, TX 78712, USA
Search for more papers by this authorJ. C. Wheeler
Department of Astronomy, University of Texas, Austin, TX 78712, USA
Search for more papers by this authorD. R. Young
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
Search for more papers by this authorCorresponding Author
A. Pastorello
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
E-mail: [email protected]
Present address: California Institute of Technology, Pasadena, CA 91125, USA.
Search for more papers by this authorCorresponding Author
R. M. Quimby
Department of Astronomy, University of Texas, Austin, TX 78712, USA
E-mail: [email protected]
Present address: California Institute of Technology, Pasadena, CA 91125, USA.
Search for more papers by this authorS. J. Smartt
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
Search for more papers by this authorS. Mattila
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland
Search for more papers by this authorH. Navasardyan
INAF Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Search for more papers by this authorR. M. Crockett
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
Search for more papers by this authorN. Elias-Rosa
INAF Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching bei München, Germany
Search for more papers by this authorP. Mondol
Department of Astronomy, University of Texas, Austin, TX 78712, USA
Search for more papers by this authorJ. C. Wheeler
Department of Astronomy, University of Texas, Austin, TX 78712, USA
Search for more papers by this authorD. R. Young
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN
Search for more papers by this authorABSTRACT
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.
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