Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula

dc.creatorAlbacete Colombo, Juan Facundo
dc.creatorMorrell, Nidia Irene
dc.creatorNiemelä, Virpi Sinikka
dc.creatorCorcoran, Michael
dc.date2001
dc.date2010-08-26T03:00:00Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/2071
dc.identifierhttp://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04497.x/pdf
dc.identifierissn:1365-2966
dc.descriptionOptical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.formatapplication/pdf
dc.format78-84
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.subjectCiencias Astronómicas
dc.subjectastrofísica
dc.subjectbinaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars
dc.titleOptical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
dc.typeArticulo
dc.typeArticulo


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