Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-18T15:23:14.483Z Has data issue: false hasContentIssue false
  • English
  • Français

Non-thermal emission in Cyg OB2

Published online by Cambridge University Press:  31 March 2017

D. Fenech ,
J. Morford  and
R. Prinja
D. Fenech
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT email: [email protected]
J. Morford
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT email: [email protected]
R. Prinja
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We report here on the first results from the Cyg OB2 Radio Survey (COBRaS), which is a UCL-led e-MERLIN legacy project to provide a deep-field radio mapping of the Cygnus OB2 association. The project has been awarded a total allocation of 252 hours at C-band (5 GHz) and 42 hours at L-band (1.6 GHz) to image the core of the cluster.

We discuss in particular the presence of non-thermal radio emission at 20 cm (L-band), and its potential as a highly efficient way to identify binaries via single-epoch observations, particularly for colliding-wind binaries. COBRaS data will provide a powerful tool for establishing binary incidence in Cyg OB2, specifically in the difficult intermediate-period range (1–100 yr).

Ultimately, we aim to assemble a substantial and uniquely sensitive radio dataset, which will be exploited to address several fundamentally important areas of stellar astrophysics, including mass-loss, binary frequency, stellar cluster dynamics, and triggered star-formation.

Keywords

radiation mechanisms: nonthermalbinaries: generalstars: early-typeassociations: individual: Cyg OB2
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S316: Formation, evolution, and survival of massive star clusters , August 2015 , pp. 139 - 140
Copyright
Copyright © International Astronomical Union 2017 

References

Blomme, R., Nazé, Y., Volpi, D., De Becker, M., Prinja, R. K., Pittard, J. M., Parkin, E. R., & Absil, O. 2014, A&A, 570, 10 Google Scholar
Hanson, M. M. 2003, ApJ, 597, 957 CrossRefGoogle Scholar
Knodlseder, J. 2000, A&A, 360, 539 Google Scholar
Kobulnicky, H. A. et al. 2014, ApJS, 213, 34 Google Scholar
Setia-Gunawan, D. Y. A., De Bruyn, A. G., Van der Hucht, K. A., & Williams, P. M. 2003, ApJS, 149, 123 CrossRefGoogle Scholar