| dc.creator | Arias, Julia Inés | |
| dc.creator | Morrell, Nidia Irene | |
| dc.creator | Barbá, Rodolfo Héctor | |
| dc.creator | Bosch, Guillermo Luis | |
| dc.creator | Grosso, M. | |
| dc.creator | Corcoran, Michael | |
| dc.date | 2002 | |
| dc.date | 2019-11-01T17:43:53Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/84665 | |
| dc.identifier | issn:0035-8711 | |
| dc.description | We present a new optical spectroscopic study of the O-type binary HD 165052 based on high-and intermediate-resolution CCD observations. We re-investigated the spectral classification of the binary components, obtaining spectral types of O6.5 V and O7.5 V for the primary and secondary, respectively, finding that both stars display weak CIII λ5696 emission in their spectra. We also determined a radial-velocity orbit for HD 165052 with a period of 2.95510 ± 0.00001 d, and semi-amplitudes of 94.8 and 104.7 ± 0.5km s<SUP>-1</SUP>, resulting in a mass ratio Q = 0.9. From a comparison with previous radial-velocity determinations, we found evidence of apsidal motion in the system. Several signatures of wind-wind collision, such as phase-locked variability of the X-ray flux and the Struve-Sahade effect, are also considered. It was also found that the reddening in the region should be normal, in contrast with previous determinations. | |
| dc.description | Facultad de Ciencias Astronómicas y Geofísicas | |
| dc.format | application/pdf | |
| dc.format | 202-210 | |
| 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 | Binaries: General | |
| dc.subject | Stars: Early-type | |
| dc.subject | Stars: Individual: Hd 165052 | |
| dc.subject | X-rays: Stars | |
| dc.title | The massive double-lined O-type binary HD 165052 | |
| dc.type | Articulo | |
| dc.type | Articulo | |
