Magnetic field variations with pulsational phase in the classical Cepheid star η Aquilae

Details Magnetic field variations with pulsational phase in the classical Cepheid star η Aquilae Magnetic field variations with pulsational phase in the classical Cepheid star η Aquilae

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...360..642p&link_type=abstract

Astronomy and Astrophysics, Vol. 360, p.642-646

Astronomy and Astrophysics

Astrophysics

7

Shock Waves, Stars: Individual: Η Aquilae, Stars: Magnetic Fields, Stars: Oscillations, Stars: Variables: Cepheids

Scientific paper

The presence of the magnetic field on the classical Cepheid η Aquilae is established. The magnetic field shows periodic variations with a reversal of its polarity due to stellar pulsations (-100 < Be < +50 G). Two closed values of Be lie out of the magnetic curve at phases φ = 0.610 and φ = 0.629. It was suggested that these recoiled points show that the abrupt change of the magnetic field occurred at the phase of propagation of the shock wave within the stellar atmosphere.

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