An Off-Axis Relativistic Jet Model for the Type Ic supernova SN 2007gr

Abstract

We propose an off-axis relativistic jet model for the Type Ic supernova SN 2007gr. Most of the energy ($\sim 2\times 10^{51}$ erg) in the explosion is contained in non-relativistic ejecta which produces the supernova. The optical emission is coming from the decay process of ${}^{56}\mathrm{Ni}$ synthesized in the bulk SN ejecta. Only very little energy ($\sim 10^{48}$ 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 $\dot{M}=1.0\times 10^{-5}{M}_{\odot }\mathrm{y}{\mathrm{r}}^{-1}$ and the wind velocity $v_{\mathrm{w}}=1.5\times 10^3\mathrm{km}{\mathrm{s}}^{-1}$ together with an observing angle of ${\theta }_{\mathrm{obs}}=63.3^{\circ }$, we can obtain the 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 are observing the jet from off-axis.

22 pages, 4 figures, accepted for publication in ApJ

References in corpus (6)

• The Supernova -- Gamma-Ray Burst Connection
• The carbon-rich type Ic SN 2007gr: the photospheric phase
• Numerical Study on GRB-Jet Formation in Collapsars
• Development of General Relativistic Magnetohydrodynamic Code and its Application to Central Engine of Long Gamma-Ray Bursts
• A mildly relativistic radio jet from the otherwise normal Type Ic Supernova 2007gr
• The birth place of the type Ic Supernova 2007gr

Cited by in corpus (7)

• Modeling high-energy light curves of the PSR B1259-63/LS 2883 binary based on 3-D SPH simulations
• SN 2007bg: The Complex Circumstellar Environment Around One of the Most Radio-Luminous Broad-Lined Type Ic Supernovae
• Off-axis afterglow light curves and images from 2D hydrodynamic simulations of double-sided GRB jets in a stratified external medium
• A high mass progenitor for the Type Ic Supernova 2007gr inferred from its environment
• Detecting Radio Afterglows of Gamma-Ray Bursts with FAST
• Failed Gamma-Ray Bursts: Thermal UV/Soft X-ray Emission Accompanied by Peculiar Afterglows
• Toward an inner connection of SNe Ic, SLSNe Ic, XRF connected SNe, SNe Ic-BL, and GRB connected SNe