SN 2005bf: A possible transition event between type Ib/c supernovae and gamma-ray bursts
We present u′g′r′i′BV photometry and optical spectroscopy of the Type Ib/Ic SN 2005bf covering the first ∼100 days following discovery. The u′g′BV light curves displayed an unprecedented morphology among Type Ib/Ic supernovae, with an initial maximum some 2 weeks after discovery and a second, main m...
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2006
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/83240 |
| Aporte de: |
| id |
I19-R120-10915-83240 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas Gamma rays: bursts Supernovae: individual (SN 2005bf) |
| spellingShingle |
Ciencias Astronómicas Gamma rays: bursts Supernovae: individual (SN 2005bf) Folatelli, Gastón Contreras, Carlos Phillips, M. M. Woosley, S. E. Blinnikov, Sergei Morrell, Nidia Irene Suntzeff, Nicholas B. Lee, Brian L. Hamuy, Mario González, Sergio Krzeminski, Wojtek Roth, Miguel Li, Weidong Filippenko, Alexei V. Foley, Ryan J. Freedman, W. L. Madore, Barry F. Persson, S. E. Murphy, David Boissier, Samuel Galaz, Gaspar González, Luis McCarthy, P. J. McWilliam, Andrew Pych, Wojtek SN 2005bf: A possible transition event between type Ib/c supernovae and gamma-ray bursts |
| topic_facet |
Ciencias Astronómicas Gamma rays: bursts Supernovae: individual (SN 2005bf) |
| description |
We present u′g′r′i′BV photometry and optical spectroscopy of the Type Ib/Ic SN 2005bf covering the first ∼100 days following discovery. The u′g′BV light curves displayed an unprecedented morphology among Type Ib/Ic supernovae, with an initial maximum some 2 weeks after discovery and a second, main maximum about 25 days after that. The bolometric light curve indicates that SN 2005bf was a remarkably luminous event, radiating at least 6.3 × 1042 ergs s -1 at maximum light and a total of 2.1 × 1049 ergs during the first 75 days after the explosion. Spectroscopically, SN 2005bf underwent a unique transformation from a Type Ic-like event at early times to a typical Type Ib supernova at later phases. The initial maximum in u′g′BV was accompanied by the presence in the spectrum of high-velocity (>14,000 km s-1) absorption lines of Fe II, Ca II, and H I. The photospheric velocity derived from spectra at early epochs was below 10,000 km s-1, which is unusually low compared with ordinary Type Ib supernovae. We describe one-dimensional computer simulations that attempt to account for these remarkable properties. The most favored model is that of a very energetic (2 × 1051 ergs), asymmetric explosion of a massive (8.3 M⊙) Wolf-Rayet WN star that had lost most of its hydrogen envelope. We speculate that an unobserved relativistic jet was launched producing a two-component explosion consisting of (1) a polar explosion containing a small fraction of the total mass and moving at high velocity and (2) the explosion of the rest of the star. At first, only the polar explosion is observed, producing the initial maximum and the high-velocity absorption-line spectrum resembling a Type Ic event. At late times, this fast-moving component becomes optically thin, revealing the more slowly moving explosion of the rest of the star and transforming the observed spectrum to that of a typical Type Ib supernova. If this scenario is correct, then SN 2005bf is the best example to date of a transition object between normal Type Ib/Ic supernovae and γ-ray bursts. |
| format |
Articulo Articulo |
| author |
Folatelli, Gastón Contreras, Carlos Phillips, M. M. Woosley, S. E. Blinnikov, Sergei Morrell, Nidia Irene Suntzeff, Nicholas B. Lee, Brian L. Hamuy, Mario González, Sergio Krzeminski, Wojtek Roth, Miguel Li, Weidong Filippenko, Alexei V. Foley, Ryan J. Freedman, W. L. Madore, Barry F. Persson, S. E. Murphy, David Boissier, Samuel Galaz, Gaspar González, Luis McCarthy, P. J. McWilliam, Andrew Pych, Wojtek |
| author_facet |
Folatelli, Gastón Contreras, Carlos Phillips, M. M. Woosley, S. E. Blinnikov, Sergei Morrell, Nidia Irene Suntzeff, Nicholas B. Lee, Brian L. Hamuy, Mario González, Sergio Krzeminski, Wojtek Roth, Miguel Li, Weidong Filippenko, Alexei V. Foley, Ryan J. Freedman, W. L. Madore, Barry F. Persson, S. E. Murphy, David Boissier, Samuel Galaz, Gaspar González, Luis McCarthy, P. J. McWilliam, Andrew Pych, Wojtek |
| author_sort |
Folatelli, Gastón |
| title |
SN 2005bf: A possible transition event between type Ib/c supernovae and gamma-ray bursts |
| title_short |
SN 2005bf: A possible transition event between type Ib/c supernovae and gamma-ray bursts |
| title_full |
SN 2005bf: A possible transition event between type Ib/c supernovae and gamma-ray bursts |
| title_fullStr |
SN 2005bf: A possible transition event between type Ib/c supernovae and gamma-ray bursts |
| title_full_unstemmed |
SN 2005bf: A possible transition event between type Ib/c supernovae and gamma-ray bursts |
| title_sort |
sn 2005bf: a possible transition event between type ib/c supernovae and gamma-ray bursts |
| publishDate |
2006 |
| url |
http://sedici.unlp.edu.ar/handle/10915/83240 |
| work_keys_str_mv |
AT folatelligaston sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT contrerascarlos sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT phillipsmm sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT woosleyse sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT blinnikovsergei sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT morrellnidiairene sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT suntzeffnicholasb sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT leebrianl sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT hamuymario sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT gonzalezsergio sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT krzeminskiwojtek sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT rothmiguel sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT liweidong sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT filippenkoalexeiv sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT foleyryanj sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT freedmanwl sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT madorebarryf sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT perssonse sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT murphydavid sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT boissiersamuel sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT galazgaspar sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT gonzalezluis sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT mccarthypj sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT mcwilliamandrew sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts AT pychwojtek sn2005bfapossibletransitioneventbetweentypeibcsupernovaeandgammaraybursts |
| bdutipo_str |
Repositorios |
| _version_ |
1764820488419278850 |