AN OFF-AXIS RELATIVISTIC JET MODEL FOR THE TYPE Ic SUPERNOVA SN 2007gr

Journal Article · Fri Jul 01 00:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/735/1/3· OSTI ID:21576581

Xu, M; Huang, Y F ^[1]; Nagataki, S ^[2]

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1. Department of Astronomy, Nanjing University, Nanjing 210093 (China)
2. Yukawa Institute for Theoretical Physics, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502 (Japan)

We propose an off-axis relativistic jet model for the Type Ic supernova SN 2007gr. Most of the energy ({approx}2 x 10{sup 51} erg) in the explosion is contained in non-relativistic ejecta which produces the supernova (SN). The optical emission comes from the decay process of {sup 56}Ni synthesized in the bulk SN ejecta. Only very little energy ({approx}10{sup 48} erg) is contained in the relativistic jet with initial velocity about 0.94 times the speed of light. The radio and X-ray emission comes from this relativistic jet. With some typical parameters of a Wolf-Rayet star (progenitor of Type Ic SN), i.e., the mass-loss rate M-dot =1.0x10{sup -5} M{sub sun} yr{sup -1} and the wind velocity v{sub w} = 1.5 x 10{sup 3} km s{sup -1} together with an observing angle of {theta}{sub obs} = 63.{sup 0}3, we can obtain multiband light curves that fit the observations well. All the observed data are consistent with our model. Thus, we conclude that SN 2007gr contains a weak relativistic jet and we observe the jet from off-axis.

• OSTI ID: 21576581
• Journal Information: Astrophysical Journal, Vol. 735, Issue 1; Other Information: DOI: 10.1088/0004-637X/735/1/3; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DECAY
EMISSION
JET MODEL
NICKEL 56
RADIOWAVE RADIATION
SUPERNOVAE
X RADIATION
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BINARY STARS
DAYS LIVING RADIOISOTOPES
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ERUPTIVE VARIABLE STARS
EVEN-EVEN NUCLEI
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
MATHEMATICAL MODELS
NICKEL ISOTOPES
NUCLEI
PARTICLE MODELS
RADIATIONS
RADIOISOTOPES
STARS
VARIABLE STARS