Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-10-12
Astrophys.J.641:1051-1059,2006
Astronomy and Astrophysics
Astrophysics
26 pages, 4 figures, ApJ submitted
Scientific paper
10.1086/500539
The Type Ib/c supernova SN 2001em was observed to have strong radio, X-ray, and Halpha emission at an age of about 2.5 yr. Although the radio and X-ray emission have been attributed to an off-axis gamma-ray burst, we model the emission as the interaction of normal SN Ib/c ejecta with a dense, massive (3 Msun) circumstellar shell at a distance about 7 x 10^{16} cm. We investigate two models, in which the circumstellar shell has or has not been overtaken by the forward shock at the time of the X-ray observation. The circumstellar shell was presumably formed by vigorous mass loss with a rate (2-10) x 10^{-3} Msun/yr at 1000-2000 yr prior to the supernova explosion. The hydrogen envelope was completely lost, and subsequently was swept up and accelerated by the fast wind of the presupernova star up to a velocity of 30-50 km/s. Although interaction with the shell can explain most of the late emission properties of SN 2001em, we need to invoke clumping of the gas to explain the low absorption at X-ray and radio wavelengths.
Chevalier Roger A.
Chugai Nikolai N.
No associations
LandOfFree
Late Emission from the Type Ib/c SN 2001em: Overtaking the Hydrogen Envelope does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Late Emission from the Type Ib/c SN 2001em: Overtaking the Hydrogen Envelope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Late Emission from the Type Ib/c SN 2001em: Overtaking the Hydrogen Envelope will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-685701