Discovery of a very large magnetic field in the AP star HD 47103.

Details Discovery of a very large magnetic field in the AP star HD 47103. Discovery of a very large magnetic field in the AP star HD 47103.

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...303l...5b&link_type=abstract

Astronomy and Astrophysics, v.303, p.L5

Astronomy and Astrophysics

Astrophysics

14

Stars: Individual: Hd 47103, Stars: Chemically Peculiar, Stars: Magnetic Fields, Stars: Fundamental Parameters, Stars: Early-Type, Line: Profiles

Scientific paper

In the course of a systematic survey of surface magnetic fields of cool Ap stars with correlation procedures, we have discovered a 17.5kG field in the 9th magnitude Ap SrEu star HD 47103. This star has a small projected rotational velocity vsini=4.4km/s only and the Zeeman pattern is resolved for many lines and in particular in the correlation peaks. Its effective temperature, estimated from the profile of the Balmer lines, is 8900+/-300K. It has one of the largest field known among all Sr-type Ap stars. Most of the previously detected stars, with fields larger or similar to HD 47103, are hotter than this object. The field was estimated by a new technique which requires moderate signal-to-noise. This method is reliable in that it gives very good agreement with the method of Mathys (1990).

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