On the Light Curve and Spectrum of SN 2003dh Separated from the Optical Afterglow of GRB 030329

Details On the Light Curve and Spectrum of SN 2003dh Separated from the Optical Afterglow of GRB 030329 On the Light Curve and Spectrum of SN 2003dh Separated from the Optical Afterglow of GRB 030329

2005-01-31

arxiv.org/abs/astro-ph/0501670v2

Astrophys.J. 624 (2005) 898-905

Astronomy and Astrophysics

Astrophysics

18 pages, 7 figures, published by ApJ

Scientific paper

10.1086/429284

The net optical light curves and spectra of the supernova (SN) 2003dh are obtained from the published spectra of GRB 030329, covering about 6 days before SN maximum to about 60 days after. The bulk of the U-band flux is subtracted from the observed spectra using early-time afterglow templates, because strong line blanketing greatly depresses the UV and U-band SN flux in a metal-rich, fast-moving SN atmosphere. The blue-end spectra of the gamma-ray burst (GRB)connected hypernova SN 1998bw is used to determine the amount of subtraction. The subtraction of a host galaxy template affects the late-time results. The derived SN 2003dh light curves are narrower than those of SN 1998bw, rising as fast before maximum, reaching a possibly fainter maximum, and then declining ~ 1.2-1.4 times faster. We then build UVOIR bolometric SN light curve. Allowing for uncertainties, it can be reproduced with a spherical ejecta model of Mej ~ 7+/-3 Msun, KE ~ (3.5+/-1.5)E52 ergs, with KE/Mej ~ 5 following previous spectrum modelling, and M(Ni56) ~ (0.4 +0.15/-0.1) Msun. This suggests a progenitor main-sequence mass of about 25-40 Msun, lower than SN 1998bw but significantly higher than normal Type Ic SNe and the GRB-unrelated hypernova SN 2002ap.

Affiliated with

Also associated with

No associations

Rating

On the Light Curve and Spectrum of SN 2003dh Separated from the Optical Afterglow of GRB 030329 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 On the Light Curve and Spectrum of SN 2003dh Separated from the Optical Afterglow of GRB 030329, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Light Curve and Spectrum of SN 2003dh Separated from the Optical Afterglow of GRB 030329 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-299823