| dc.creator | Araya, I. | |
| dc.creator | Curé, Michel | |
| dc.creator | Doula, A. ud | |
| dc.creator | Santillán, A. | |
| dc.creator | Cidale, Lydia Sonia | |
| dc.date | 2018-06 | |
| dc.date | 2020-04-21T18:16:19Z | |
| dc.date.accessioned | 2023-07-14T19:20:18Z | |
| dc.date.available | 2023-07-14T19:20:18Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/93912 | |
| dc.identifier | https://academic.oup.com/mnras/article/477/1/755/4975263 | |
| dc.identifier | https://ri.conicet.gov.ar/handle/11336/82696 | |
| dc.identifier | issn:0035-8711 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7434913 | |
| dc.description | Most radiation-driven winds of massive stars can be modelled with m-CAK theory, resulting in the so-called fast solution. However, the most rapidly rotating stars among them, especially when the rotational speed is higher than ∼75 per cent of the critical rotational speed, can adopt a different solution, the so-called Ω-slow solution, characterized by a dense and slow wind. Here, we study the transition region of the solutions where the fast solution changes to the Ω-slow solution. Using both time-steady and time-dependent numerical codes, we study this transition region for various equatorial models of B-type stars. In all cases, in a certain range of rotational speeds we find a region where the fast and the Ω-slow solution can coexist. We find that the type of solution obtained in this co-existence region depends stongly on the initial conditions of our models. We also test the stability of the solutions within the co-existence region by performing base-density perturbations in the wind. We find that under certain conditions, the fast solution can switch to the Ω-slow solution, or vice versa. Such solution-switching may be a possible contributor of material injected into the circumstellar environment of Be stars, without requiring rotational speeds near critical values. | |
| dc.description | Facultad de Ciencias Astronómicas y Geofísicas | |
| dc.description | Instituto de Astrofísica de La Plata | |
| dc.format | application/pdf | |
| dc.format | 755-765 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Astronomía | |
| dc.subject | hydrodynamics | |
| dc.subject | stars: early-type | |
| dc.subject | stars: rotation | |
| dc.subject | stars: winds, outflows | |
| dc.title | Co-existence and switching between fast and Ω-slow wind solutions in rapidly rotating massive stars | |
| dc.type | Articulo | |
| dc.type | Articulo | |
