The variations of the BP star HD 137509.

Details The variations of the BP star HD 137509. The variations of the BP star HD 137509.

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...323..881m&link_type=abstract

Astronomy and Astrophysics, v.323, p.881-885

Astronomy and Astrophysics

Astrophysics

8

Stars: Chemically Peculiar, Stars: Magnetic Fields, Stars: Rotation, Stars: Individual: Hd 137509

Scientific paper

A refined value P=(4.4916+/-0.0002) d is derived for the rotation period of the Bp star HD 137509, from the simultaneous consideration of photometric data recorded in the Geneva system and of measurements of the mean longitudinal magnetic field and of the crossover. The variations of the magnetic field (one of the most intense fields known in an Ap or Bp star) show the signature of a strong quadrupolar component. This remarkable property is reflected in the brightness and line equivalent width variations.

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