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

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 389:1 (2008) 131-140

Authors:

A Pastorello, RM Quimby, SJ Smartt, S Mattila, H Navasardyan, RM Crockett, N Elias-Rosa, P Mondol, JC Wheeler, DR Young
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Massive stars exploding in a He-rich circumstellar medium – I. Type Ibn (SN 2006jc-like) events

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 389:1 (2008) 113-130

Authors:

A Pastorello, S Mattila, L Zampieri, M Della Valle, SJ Smartt, S Valenti, I Agnoletto, S Benetti, CR Benn, D Branch, E Cappellaro, M Dennefeld, JJ Eldridge, A Gal-Yam, A Harutyunyan, I Hunter, H Kjeldsen, Y Lipkin, PA Mazzali, P Milne, H Navasardyan, EO Ofek, E Pian, O Shemmer, S Spiro, RA Stathakis, S Taubenberger, M Turatto, H Yamaoka
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Massive stars exploding in a He-rich circumstellar medium – III. SN 2006jc: infrared echoes from new and old dust in the progenitor CSM

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 389:1 (2008) 141-155

Authors:

S Mattila, WPS Meikle, P Lundqvist, A Pastorello, R Kotak, J Eldridge, S Smartt, A Adamson, CL Gerardy, L Rizzi, AW Stephens, SD Van Dyk
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VLT detection of a red supergiant progenitor of the type IIP supernova 2008bk

(2008)

Authors:

S Mattila, SJ Smartt, JJ Eldridge, JR Maund, RM Crockett, IJ Danziger
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The metamorphosis of supernova SN 2008D/XRF 080109: A link between supernovae and GRBs/hypernovae

Science 321:5893 (2008) 1185-1188

Authors:

PA Mazzali, S Valenti, M Della Valle, G Chincarini, DN Sauer, S Benetti, E Pian, T Piran, V D'Elia, N Elias-Rosa, R Margutti, F Pasotti, LA Antonelli, F Bufano, S Campana, E Cappellaro, S Covino, P D'Avanzo, F Fiore, D Fugazza, R Gilmozzi, D Hunter, K Maguire, E Maiorano, P Marziani, N Masetti, F Mirabel, H Navasardyan, K Nomoto, E Palazzi, A Pastorello, N Panagia, LJ Pellizza, R Sari, S Smartt, G Tagliaferri, M Tanaka, S Taubenberger, N Tominaga, C Trundle, M Turatto

Abstract:

The only supernovae (SNe) to show gamma-ray bursts (GRBs) or early x-ray emission thus far are overenergetic, broad-lined type Ic SNe (hypernovae, HNe). Recently, SN 2008D has shown several unusual features: (i) weak x-ray flash (XRF), (ii) an early, narrow optical peak, (iii) disappearance of the broad lines typical of SN Ic HNe, and (iv) development of helium lines as in SNe Ib. Detailed analysis shows that SN 2008D was not a normal supernova: Its explosion energy (E ≈ 6 × 1051 erg) and ejected mass [∼7 times the mass of the Sun (MFish eye)] are intermediate between normal SNe Ibc and HNe. We conclude that SN 2008D was originally a ∼30 M Fish eye star. When it collapsed, a black hole formed and a weak, mildly relativistic jet was produced, which caused the XRF. SN 2008D is probably among the weakest explosions that produce relativistic jets. Inner engine activity appears to be present whenever massive stars collapse to black holes.
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