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Coronal dimming as a proxy for stellar coronal mass ejections

Published online by Cambridge University Press:  24 September 2020

M. Jin
Affiliation:
SETI Institute, 189 N Bernardo Ave suite 200, Mountain View, CA94043, USA email: [email protected] Lockheed Martin Solar and Astrophysics Lab (LMSAL), 3251 Hanover St., Bldg. 252, Palo Alto, CA94304, USA
M. C. M. Cheung
Affiliation:
Lockheed Martin Solar and Astrophysics Lab (LMSAL), 3251 Hanover St., Bldg. 252, Palo Alto, CA94304, USA Hansen Experimental Physics Laboratory, Stanford University, 452 Lomita Mall, Stanford, CA94305, USA
M. L. DeRosa
Affiliation:
Lockheed Martin Solar and Astrophysics Lab (LMSAL), 3251 Hanover St., Bldg. 252, Palo Alto, CA94304, USA
N. V. Nitta
Affiliation:
Lockheed Martin Solar and Astrophysics Lab (LMSAL), 3251 Hanover St., Bldg. 252, Palo Alto, CA94304, USA
C. J. Schrijver
Affiliation:
Lockheed Martin Solar and Astrophysics Lab (LMSAL), 3251 Hanover St., Bldg. 252, Palo Alto, CA94304, USA
K. France
Affiliation:
Laboratory for Atmospheric and Space Physics, University of Colorado at Boulder, 1234 Innovation Dr, Boulder, CO80303, USA
A. Kowalski
Affiliation:
Laboratory for Atmospheric and Space Physics, University of Colorado at Boulder, 1234 Innovation Dr, Boulder, CO80303, USA
J. P. Mason
Affiliation:
Laboratory for Atmospheric and Space Physics, University of Colorado at Boulder, 1234 Innovation Dr, Boulder, CO80303, USA
R. Osten
Affiliation:
Space Telescope Science Institute, 3700 San Martin Dr, Baltimore, MD21218, USA
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Abstract

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Solar coronal dimmings have been observed extensively in the past two decades and are believed to have close association with coronal mass ejections (CMEs). Recent study found that coronal dimming is the only signature that could differentiate powerful flares that have CMEs from those that do not. Therefore, dimming might be one of the best candidates to observe the stellar CMEs on distant Sun-like stars. In this study, we investigate the possibility of using coronal dimming as a proxy to diagnose stellar CMEs. By simulating a realistic solar CME event and corresponding coronal dimming using a global magnetohydrodynamics model (AWSoM: Alfvén-wave Solar Model), we first demonstrate the capability of the model to reproduce solar observations. We then extend the model for simulating stellar CMEs by modifying the input magnetic flux density as well as the initial magnetic energy of the CME flux rope. Our result suggests that with improved instrument sensitivity, it is possible to detect the coronal dimming signals induced by the stellar CMEs.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

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