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A multi-wavelength view of NGC 1624-2

Published online by Cambridge University Press:  28 July 2017

A. David-Uraz ,
V. Petit ,
R. MacInnis ,
C. Erba ,
S. P. Owocki ,
A. W. Fullerton ,
N. R. Walborn  and
D. H. Cohen
A. David-Uraz
Affiliation:
Department of Physics and Space Sciences, Florida Institute of Technology, Melbourne, FL 32904, USA Department of Physics and Astronomy, Bartol Research Institute, University of Delaware, Newark, DE 19716, USA
V. Petit
Affiliation:
Department of Physics and Space Sciences, Florida Institute of Technology, Melbourne, FL 32904, USA Department of Physics and Astronomy, Bartol Research Institute, University of Delaware, Newark, DE 19716, USA
R. MacInnis
Affiliation:
Department of Physics and Space Sciences, Florida Institute of Technology, Melbourne, FL 32904, USA
C. Erba
Affiliation:
Department of Physics and Space Sciences, Florida Institute of Technology, Melbourne, FL 32904, USA
S. P. Owocki
Affiliation:
Department of Physics and Space Sciences, Florida Institute of Technology, Melbourne, FL 32904, USA
A. W. Fullerton
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
N. R. Walborn
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
D. H. Cohen
Affiliation:
Department of Physics and Astronomy, Swarthmore College, 500 College Ave., Swarthmore, PA 19081, USA
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Abstract

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Large magnetometric surveys have contributed to the detection of an increasing number of magnetic massive stars, and to the recognition of a population of magnetic massive stellar objects with distinct properties. Among these, NGC 1624-2 possesses the largest magnetic field of any O-type star; such a field confines the stellar wind into a circumstellar magnetosphere, which can be probed using observations at different wavelength regimes. Recent optical and X-ray observations suggest that NGC 1624-2’s magnetosphere is much larger than that of any other magnetic O star. By modeling the variations of UV resonance lines, we can constrain its velocity structure. Furthermore, recent spectropolarimetric observations raise the possibility of a more complex field topology than previously expected. Putting all of these multi-wavelength constraints together will allow us to paint a consistent picture of NGC 1624-2 and its surprising behavior, giving us valuable insight into the very nature of massive star magnetospheres.

Keywords

stars: mass lossstars: magnetic fieldsultraviolet: starsX-rays: stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 394
Copyright
Copyright © International Astronomical Union 2017