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Detection of a magnetic region on HR 1099The 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.
Document ID
19900064765
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Donati, J.-F.
(Observatoire de Paris-Meudon France)
Semel, M.
(Paris Observatoire, Meudon, France)
Rees, D. E.
(Sydney, University Australia)
Taylor, K.
(Anglo-Australian Observatory Epping, Australia)
Robinson, R. D.
(NASA Goddard Space Flight Center; Computer Sciences Corp. Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1990
Publication Information
Publication: Astronomy and Astrophysics
Volume: 232
Issue: 1, Ju
ISSN: 0004-6361
Subject Category
Astrophysics
Accession Number
90A51820
Distribution Limits
Public
Copyright
Other

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