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- Multiwavelength study of the intriguing massive star CPD−59 2629 (Tr 16-22)
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Multiwavelength study of the intriguing massive star CPD−59 2629 (Tr 16-22)
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Abstract
We report preliminary results of a multi-wavelength (radio–optical–X-ray) study of the massive star CPD −59 2629 (Tr 16-22) in the Carina Nebula (NGC 3372). This star has historically shown a large X-ray excess (log LX/Lbol < −6 or even larger), which is one order of magnitude larger than expected from single massive O-type stars. A colliding wind scenario is a plausible explanation. On this subject, we searched for non-thermal radio emission and used high-resolution optical spectroscopy to check for multiplicity and investigate the nature of the stars as well as the origin and excess of the X-ray emission. We detected long-term radial-velocity and X-ray variability. Both results suggest that Tr 16-22 is a long-term massive binary system and a variable colliding wind shock scenario.
To cite this article
About: J. A. Combi
Instituto Argentino de Radioastronomía, Buenos Aires, Argentina, and Centro Universitario Regional Zona Atlántica (CURZA), Viedma, Argentina, et
About: J. F. Albacete-Colombo
Departamento de Física, Universidad de Jaén, Jaén, Spain
About: P. L. Luque Escamilla
Centro Universitario Regional Zona Atlántica (CURZA), Viedma, Argentina
About: G. E. Romero
Departamento de Física, Universidad de Jaén, Jaén, Spain
About: R. Gamen
Instituto Argentino de Radioastronomía, Buenos Aires, Argentina
About: P. Benaglia
Instituto de Astrofísica de La Plata, CONICET, UNLP, Argentina
About: J. Martí
Instituto Argentino de Radioastronomía, Buenos Aires, Argentina
About: J. López-Santiago
Departamento de Física, Universidad de Jaén, Jaén, Spain
About: E. Sánchez-Ayaso
Departamento de Astrofísica y CC. de la Atmósfera, UCM, Madrid, Spain
About: A. J. Muñoz-Arjonilla
Departamento de Física, Universidad de Jaén, Jaén, Spain
About: J. R. Sánchez-Sutil
Departamento de Física, Universidad de Jaén, Jaén, Spain