The metamorphosis of supernova SN 2008D/XRF 080109: A link between supernovae and GRBs/hypernovae

Paolo A. Mazzali, Stefano Valenti, Massimo Della Valle, Guido Chincarini, Daniel N. Sauer, Stefano Benetti, Elena Pian, Tsvi Piran, Valerio D'Elia, Nancy Elias-Rosa, Raffaella Margutti, Francesco Pasotti, L. Angelo Antonelli, Filomena Bufano, Sergio Campana, Enrico Cappellaro, Stefano Covino, Paolo D'Avanzo, Fabrizio Fiore, Dino FugazzaRoberto Gilmozzi, Deborah Hunter, Kate Maguire, Elisabetta Maiorano, Paola Marziani, Nicola Masetti, Felix Mirabel, Hripsime Navasardyan, Ken'ichi Nomoto, Eliana Palazzi, Andrea Pastorello, Nino Panagia, L. J. Pellizza, Re'em Sari, Stephen Smartt, Gianpiero Tagliaferri, Masaomi Tanaka, Stefan Taubenberger, Nozomu Tominaga, Carrie Trundle, Massimo Turatto

研究成果: Article査読

159 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1185-1188
ページ数4
ジャーナルScience
321
5893
DOI
出版ステータスPublished - 2008 8 29
外部発表はい

ASJC Scopus subject areas

  • General

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