Modeling the Corona of AB Doradus

Details Modeling the Corona of AB Doradus Modeling the Corona of AB Doradus

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003csss...12...50h&link_type=abstract

The Future of Cool-Star Astrophysics: 12th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (2001 July 30 - August

Astronomy and Astrophysics

Astrophysics

Ab Dor, 3-D Simulations

Scientific paper

We present a model for the coronal topology of the active, rapidly rotating K0 dwarf, AB Doradus. Surface magnetic field maps obtained using a technique based on Zeeman Doppler imaging indicate the presence of a strong non-potential component near the pole of the star. The coronal topology is obtained by extrapolating these surface maps. The temperature and density in the corona are evaluated using an energy balance model. Emission measure distributions computed using our models compare favorably with observations. However, the density observed by EUVE, ne ≈ 1013 cm-3, at the emission measure peak temperature of 8 × 106 K remains difficult to explain satisfactorily.

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