IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
The metamorphosis of Supernova SN2008D/XRF080109: a link between Supernovae and GRBs/Hypernovae
Autor/es:
MAZZALI, PAOLO A.; VALENTI, STEFANO; DELLA VALLE, MASSIMO; CHINCARINI, GUIDO; SAUER, DANIEL N.; BENETTI, STEFANO; PIAN, ELENA; PIRAN, TSVI; D'ELIA, VALERIO; ELIAS-ROSA, NANCY; MARGUTTI, RAFFAELLA; PASOTTI, FRANCESCO; ANTONELLI, L. ANGELO; BUFANO, FILOMENA; CAMPANA, SERGIO; CAPPELLARO, ENRICO; COVINO, STEFANO; D'AVANZO, PAOLO; FIORE, FABRIZIO; FUGAZZA, DINO; GILMOZZI, ROBERTO; HUNTER, DEBORAH; MAGUIRE, KATE; MAIORANO, ELISABETTA; MARZIANI, PAOLA; MASETTI, NICOLA; MIRABEL, FELIX; NAVASARDYAN, HRIPSIME; NOMOTO, KEN'ICHI; PALAZZI, ELIANA; PASTORELLO, ANDREA; PANAGIA, NINO; PELLIZZA, LEONARDO J.; SARI, RE'EM; SMARTT, STEPHEN; TAGLIAFERRI, GIANPIERO; TANAKA, MASAOMI; TAUBENBERGER, STEFAN; TOMINAGA, NOZOMU; TRUNDLE, CARRIE; TURATTO, MASSIMO
Revista:
SCIENCE
Editorial:
The American Association for the Advancement of Science
Referencias:
Año: 2008 vol. 321 p. 1185 - 1188
ISSN:
0036-8075
Resumen:
The only supernovae (SNe) to have shown early gamma-ray or X-ray emission thus far are overenergetic, broad-lined Type Ic SNe (Hypernovae - HNe). Recently, SN 2008D shows several novel features: (i) weak XRF, (ii) an early, narrow optical peak, (iii) disappearance of the broad lines typical of SNIc HNe, (iv) development of He lines as in SNeIb. Detailed analysis shows that SN 2008D was not a normal SN: its explosion energy (KE ~ 6*10^{51} erg) and ejected mass (~7 Msun) are intermediate between normal SNeIbc and HNe. We derive that SN 2008D was originally a ~30Msun 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.