Astronomy and Astrophysics, volume 525A, 154-154 (2011/1-1)
Modeling of the Vela complex including the Vela supernova remnant, the binary system γ2 Velorum, and the Gum nebula.
SUSHCH I., HNATYK B. and NERONOV A.
Abstract (from CDS):
We study the geometry and dynamics of the Vela complex including the Vela supernova remnant (SNR), the binary system vLSR and the Gum nebula. We show that the Vela SNR belongs to a subclass of non-Sedov adiabatic remnants in a cloudy interstellar medium (ISM), the dynamics of which is determined by the heating and evaporation of ISM clouds. We explain observable characteristics of the Vela SNR with a SN explosion with energy 1.4x1050erg near the step-like boundary of the ISM with low intercloud densities (∼10–3cm–3) and with a volume-averaged density of clouds evaporated by shock in the north-east (NE) part about four times higher than the one in the south-west (SW) part. The observed asymmetry between the NE and SW parts of the Vela SNR could be explained by the presence of a stellar wind bubble (SWB) blown by the nearest-to-the Earth Wolf-Rayet (WR) star in the vLSR system. We show that the size and kinematics of vLSR SWB agree with predictions of numerical calculations for the evolution of the SWB of Mini=35M☉ star. The low initial mass of the WR star in vLSR implies that the luminosity of the nuclear line of 26Al, produced by vLSR, is below the sensitivity of existing gamma-ray telescopes.