Detection of a magnetic region on HR 1099

Details Detection of a magnetic region on HR 1099 Detection of a magnetic region on HR 1099

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...232l...1d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 232, no. 1, June 1990, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

81

Binary Stars, Late Stars, Polarization (Waves), Stellar Activity, Stellar Magnetic Fields, Doppler Effect, Starspots, Stellar Luminosity

Scientific paper

The paper reports results of a magnetic field measuring campaign on the active K component of the RS CVn system HR 1099, using Zeeman-Doppler imaging. A localized magnetic field is detected near quadrature (phase 0.85). Assuming this magnetic region has a circular shape, its longitude and latitude are, respectively, estimated to be 86 + or - 4 deg and 5 + or - 5 deg. This equatorial region is largely monopolar, has a mean field strength of 985 + or - 270 G, covers 18 + or - 3 percent of the total stellar surface and may be colocalized with a bright photospheric spot.

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