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SN 2015bh: an LBV becomes NGC 2770s fourth SN. . . or not?

Published online by Cambridge University Press:  28 July 2017

Christina C. Thöne ,
Antonio de Ugarte Postigo  and
Giorgos Leloudas
Christina C. Thöne
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain email: cthoene@iaa.es
Antonio de Ugarte Postigo
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain email: cthoene@iaa.es Dark Cosmology Centre, Niels-Bohr-Institute, Univ. of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
Giorgos Leloudas
Affiliation:
Department of Particle Physics & Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel
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Abstract

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Massive stars in the final phases of their lives frequently expel large amounts of material. An interesting example is SN 2009ip that varied in brightness years before its possible core-collapse. Here we present SN 2015bh in NGC 2770 that shows striking similarities to SN 2009ip. It experienced frequent variabilities for 21 years before a smaller precursor and the “main event” in May 2015. Its spectra are consistent with an LBV during the outburst phase and show a complex P-Cygni profile during the main event. Both SN 2009ip and 2015bh were always situated red-wards of LBVs in outburst in the HR diagram. Their final fate is currently still uncertain, SN 2009ip, however, is now fainter than in pre-explosion observations. If the star survives this event it is undoubtedly altered, and we suggest that these “zombie stars” could be LBVs evolving into a Wolf-Rayet (WR) star over a very short timescale.

Keywords

supernovae: individual (SN 2015bh, SN 2009ip)stars: evolutionstars: mass loss
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 44 - 48
Copyright
Copyright © International Astronomical Union 2017 

References

Smith, N., Li, W., Miller, A. A., et al. 2011, ApJ, 732, 63 Google Scholar
Kiminki, M. M., Reiter, M., & Smith, N., 2016, MNRAS, 463, 845 Google Scholar
Ofek, E. O., Sullivan, M., Shaviv, N. J., et al. 2014, ApJ, 789, 104 Google Scholar
Pastorello, A., Cappellaro, E., Inserra, C., et al. 2013, ApJ, 767, 1 Google Scholar
Mauerhan, J. C., Smith, N., Filippenko, A., Blanchard, K. B., et al. 2013, MNRAS, 430, 1801 Google Scholar
Thöne, C. C., de Ugarte Postigo, A., Leloudas, G., et al., 2017, A&A in pressGoogle Scholar
Duggan, G., Bellm, E., Leloudas, G., Kasliwal, M. M., & Kulkarni, S. R. 2015, The Astronomers Telegram 7515Google Scholar
Elias-Rosa, N., Benetti, S., Tomasella, L., et al. 2015, The Astronomers Telegram, 7042Google Scholar
Smith, N., Mauerhan, J. C., & Prieto, J. L., 2014, MNRAS, 438, 1191 Google Scholar
Thöne, C. C., Michałowski, M. J., Leloudas, G., et al. 2009, ApJ, 698, 1307 CrossRefGoogle Scholar
Foley, R. J., Berger, E., Fox, O., et al. 2011, ApJ, 732, 32 CrossRefGoogle Scholar
Maeder, A. & Meynet, G., 2000, A&A, 361, 159 Google Scholar
Gal-Yam, A. & Leonard, D. C., 2009, Nature, 458, 865 Google Scholar
Smith, N., 2014, ARA&A, 52, 487 Google Scholar