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CrH molecule: New diagnostic tool for measuring magnetic fields of cool dwarfs

Published online by Cambridge University Press:  18 July 2013

Oleksii Kuzmychov  and
Svetlana V. Berdyugina
Oleksii Kuzmychov*
Affiliation:
Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, 79104 Freiburg, Germany
Svetlana V. Berdyugina*
Affiliation:
Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, 79104 Freiburg, Germany
*
1email: oleksii@kis.uni-freiburg.de
2email: sveta@kis.uni-freiburg.de
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Abstract

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The quantum mechanical calculations for the A6Σ+ − X6Σ+ system of the CrH molecule were done in order to obtain its energy level structure and transition strenghts both in the absence and in the presence of a magnetic field. Employing this results and solving a set of the radiative transfer equations, we calculated the Stokes profiles for the entire 0-0 band for different magnetic field strengths and orientations. We show that the CrH lines produce a considerable polarization signal (up to 20%) at 0.5 - 10 kG. Furthermore, the polarization signal shows a significant asymmetry (broad-band polarization) that arises from the Paschen-Back effect in the individual CrH lines. An example of the signal, as it can be observed, is provided.

Keywords

brown dwarfsstars: magnetic fieldstechniques: polarimetricradiative transfer
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 477 - 478
Copyright
Copyright © International Astronomical Union 2013 

References

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