| dc.creator | Morrell, Nidia Irene | |
| dc.creator | Barbá, Rodolfo Héctor | |
| dc.creator | Niemelä, Virpi Sinikka | |
| dc.creator | Corti, Mariela Alejandra | |
| dc.creator | Albacete Colombo, Juan Facundo | |
| dc.creator | Rauw, G. | |
| dc.creator | Corcoran, Michael | |
| dc.creator | Morel, T. | |
| dc.creator | Bertrand, J. F. | |
| dc.creator | Moffat, Anthony | |
| dc.creator | St-Louis, Nicole | |
| dc.date | 2001 | |
| dc.date | 2010-08-26T03:00:00Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/2072 | |
| dc.identifier | http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04500.x/pdf | |
| dc.identifier | http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04500.x/full | |
| dc.identifier | issn:1365-2966 | |
| dc.description | A new high-quality set of orbital parameters for the O-type spectroscopic binary HD 93205 has been obtained combining échelle and coudé CCD observations. The radial velocity orbits derived from the He iiλ4686 Å (primary component) and He iλ4471 Å (secondary component) absorption lines yield semi-amplitudes of 133±2 and 314±2 km s−1 for each binary component, resulting in minimum masses of 31 and 13 M⊙(q=0.42). We also confirm for the binary components the spectral classification of O3 V+ O8 V previously assigned. Assuming for the O8 V component a ‘normal’ mass of 22–25 M⊙ we would derive for the primary O3 V a mass of ‘only’52–60 M⊙ and an inclination of about 55° for the orbital plane. We have also determined for the first time a period of apsidal motion for this system, namely 185±16 yr using all available radial velocity data sets of HD 93205 (from 1975 to 1999). Phase-locked variations of the X-ray emission of HD 93205 consisting of a rise of the observed X-ray flux near periastron passage are also discussed. | |
| dc.description | Facultad de Ciencias Astronómicas y Geofísicas | |
| dc.format | application/pdf | |
| dc.format | 85-94 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | |
| dc.subject | Ciencias Astronómicas | |
| dc.subject | Astrofísica | |
| dc.subject | binaries: general | |
| dc.subject | stars: early-type | |
| dc.subject | stars: individual: HD 93205 | |
| dc.subject | X-rays: stars | |
| dc.title | Optical spectroscopy of X-Mega targets : II. The massive double-lined O-type binary HD93205 | |
| dc.type | Articulo | |
| dc.type | Articulo | |
