Massive stars exploding in a He-rich circumstellar medium. I. Type Ibn (SN 2006jc-like) events

By A. Pastorello, Seppo Mattila, L. Zampieri, M. D. Valle, M. Della Valle, S. Smartt, S. Valenti, I. Agnoletto, S. Benetti, Chris Benn and 20 more. 2008

158 citations recorded by the source corpus.

We present new spectroscopic and photometric data of the Type Ibn supernovae 2006jc, 2000er and 2002ao. We discuss the general properties of this recently proposed supernova family, which also includes SN 1999cq. The early-time monitoring of SN 2000er traces the evolution of this class of objects during the first few days after the shock breakout. An overall similarity in the photometric and spectroscopic evolution is found among the members of this group, which would be unexpected if the energy in these core-collapse events was dominated by the interaction between supernova ejecta and circumstellar medium. Type Ibn supernovae appear to be rather normal Type Ib/c supernova explosions which occur within a He-rich circumstellar environment. SNe Ibn are therefore likely produced by the explosion of Wolf–Rayet progenitors still embedded in the He-rich material lost by the star in recent mass-loss episodes, which resemble known luminous blue variable eruptions. The evolved Wolf–Rayet star could either result from the evolution of a very massive star or be the more evolved member of a massive binary system.We also suggest that there are a number of arguments in favour of a Type Ibn classification for the historical SN 1885A (S-Andromedae), previously considered as an anomalous Type Ia event with some resemblance to SN 1991bg.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/63e99cfd1c9ad17d8ce01ce5654adf0577589d5c

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In Astronomy and Astrophysics

1. S. Smartt
2. E. Berger
3. A. Filippenko
4. Bing Zhang
5. N. Smith
6. Stan Woosley
7. S. Valenti
8. A. Gal-yam

Citations in the corpus

• Pulsational Pair-instability Supernovae (2016, background): “Most likely these events would be categorized as Type Ibn and Icn supernovae (Foley et al. 2007; Pastorello et al. 2008a,b; Smith et al. 2012).”
• ULTRAVIOLET LIGHT CURVES OF SUPERNOVAE WITH THE SWIFT ULTRAVIOLET/OPTICAL TELESCOPE (2009, background): “The similarities of SN 2006jc with SNe IIn (Pastorello et al. 2008) explains the blue UV-optical colors.”
• CALTECH CORE-COLLAPSE PROJECT (CCCP) OBSERVATIONS OF TYPE IIn SUPERNOVAE: TYPICAL PROPERTIES AND IMPLICATIONS FOR THEIR PROGENITOR STARS (2010, background): “In this context, our measurements of high mass-loss rates argue against the progenitors of SNe IIn being red giant stars, whose wind velocities and mass-loss rates are too low, and the strong hydrogen lines and extended light curves argue against Wolf-Rayet stars, whose atmospheres are expected to b”
• Carnegie Supernova Project: Observations of Type IIn supernovae ⋆ (2013, background): “The prototype of this phenomenon is the Type Ibn SN 2006jc (Pastorello et al. 2008).”
• INTERACTING SUPERNOVAE AND SUPERNOVA IMPOSTORS: SN 2009ip, IS THIS THE END? (2012, background): “Subsequent re-brightenings were announced by the 28 We note that eruptive Wolf-Rayet stars, producing impostors with a luminosity similar to that of an LBV outburst, have later on been observed to explode as He-rich Ibn SNe (Pastorello et al. 2007, 2008a; Foley et al. 2007) or hybrid IIn/Ibn events ”
• ANALYTICAL LIGHT CURVE MODELS OF SUPERLUMINOUS SUPERNOVAE: χ2-MINIMIZATION OF PARAMETER FITS (2013, background): “There are a number of events categorized as Type Ibn, by dint of having no evidence of hydrogen, but narrow emission lines of helium corresponding to a photoionized, slowly–moving CSM (Pastorello et al. 2008).”
• Progenitor mass constraints for core-collapse supernovae from correlations with host galaxy star formation⋆ (2012, background): “…C© 2012 RAS Table A1 – continued SN Host galaxy Galaxy type V r (km s−1) SN type NCR value Telescope Reference 2002ao UGC 9299 SABd 1539 Ib 0.000 LT Pastorello et al. (2008) 2002hc NGC 2559 SBbc 1559 IIL 0.948 ESO 2002hy NGC 3464 SABc 3736 Ib 0.411 ESO 2002jp NGC 3313 SBb 3706 Ic 0.903 ESO…”
• CORE-COLLAPSE SUPERNOVAE FROM THE PALOMAR TRANSIENT FACTORY: INDICATIONS FOR A DIFFERENT POPULATION IN DWARF GALAXIES (2010, background): “…for which only a few examples have been identified, such as pairproduction events (Gal-Yam et al. 2009), very luminous SNe (Quimby et al. 2009), Type Ibn SNe (Foley et al. 2007; Pastorello et al. 2008a), SN 2002cx-like events (Li et al. 2003), and SN 2002ic-like events (Hamuy et al. 2003).”
• Observational and Physical Classification of Supernovae (2016, unknown): “Spectroscopically, there is noticeable heterogeneity (Pastorello et al. 2016), including a group of events with prominent hydrogen lines in addition to He I (Pastorello et al. 2008b).”