| dc.creator | Benaglia, Paula | |
| dc.creator | Cappa, Cristina Elisabet | |
| dc.creator | Koribalski, B. S. | |
| dc.date | 2001-06-15 | |
| dc.date | 2021-09-01T15:03:40Z | |
| dc.date.accessioned | 2023-07-15T02:51:26Z | |
| dc.date.available | 2023-07-15T02:51:26Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/123953 | |
| dc.identifier | issn:0004-6361 | |
| dc.identifier | issn:1432-0746 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7463532 | |
| dc.description | A sample of OB stars (eleven Of, one O and one B supergiant) has been surveyed with the Australia Telescope Compact Array at 4.8 and 8.64 GHz with a resolution of ∼2"–4". Five stars were detected; three of them have negative spectral indices, consistent with non-thermal emission, and two have positive indices. The thermal radiation from HD 150135 and HD 163181 can be explained as coming from an optically thick ionized stellar wind. The non-thermal radiation from CD–47◦ 4551, HD 124314 and HD 150136 possibly comes from strong shocks in the wind itself and/or in the wind colliding region if the stars have a massive early-type companion. The percentage of non-thermal emitters among detected O stars has increased up to ∼50%. The Of star HD 124314 clearly shows flux density variations. Mass loss rates (or upper limits) were derived for all the observed stars and the results compared with non-radio measurements and theoretical predictions. | |
| dc.description | Facultad de Ciencias Astronómicas y Geofísicas | |
| dc.description | Instituto Argentino de Radioastronomía | |
| dc.format | application/pdf | |
| dc.format | 952-962 | |
| 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 | Ciencias Astronómicas | |
| dc.subject | stars: early-type | |
| dc.subject | stars: mass loss | |
| dc.subject | stars: winds, outflows | |
| dc.subject | radio continuum: stars | |
| dc.title | Mass loss rate determinations of southern OB stars | |
| dc.type | Articulo | |
| dc.type | Articulo | |
