SIMBAD references

2007MNRAS.377L..29E - Mon. Not. R. Astron. Soc., 377, L29-L33 (2007/May-1)

Asymmetric Wolf-Rayet winds: implications for gamma-ray burst afterglows.


Abstract (from CDS):

Recent observations of Wolf-Rayet (WR) binaries WR151 and WR155 infer that their stellar winds are asymmetric. We show that such asymmetries can alter the stellar-wind bubble structure, bringing the wind-termination shock closer to the WR star. If the wind asymmetry is caused by rotation, the wind density and distance to the wind-termination shock are both decreased along the rotation axis by a factor of a few for the observed equator-to-pole wind density ratio of WR151. If this asymmetry lasts until core-collapse the time taken to reach the wind-termination shock by supernova ejecta or a gamma-ray burst jet is reduced. This leads to a distorted structure of the supernova ejecta and makes it more likely a constant density environment is inferred from gamma-ray burst afterglow observations.

Abstract Copyright: 2007 The Author. Journal compilation © 2007 RAS

Journal keyword(s): circumstellar matter - stars: individual: WR151 - stars: winds, outflows - stars: Wolf-Rayet - gamma-rays: bursts

Status at CDS:  

Simbad objects: 3

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