Asymmetric Wolf-Rayet winds: implications for GRB afterglows
| dc.creator | Eldridge, J. J. | |
| dc.date | 2007-01-25 | |
| dc.date.accessioned | 2026-07-07T10:21:36Z | |
| dc.date.available | 2026-07-07T10:21:36Z | |
| dc.description | 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. | |
| dc.description | 5 pages, 4 figures, version revised by referee's comments, resubmitted to MNRAS | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0701707 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0701707 | |
| dc.identifier | Mon.Not.Roy.Astron.Soc.Lett.377:L29-L33,2007 | |
| dc.identifier | doi:10.1111/j.1745-3933.2007.00297.x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/175229 | |
| dc.subject | Astrophysics | |
| dc.title | Asymmetric Wolf-Rayet winds: implications for GRB afterglows | |
| dc.type | text |