Spectropolarimetric study of the classical Cepheid $\eta$ Aql: pulsation and magnetic field

Abstract

We report the results of spectropolarimetric study of the classical Cepheid $\eta$ Aql. We found that the longitudinal magnetic field of $\eta$ Aql sinusoidally varies with the radial pulsation period, while the amplitude $B$, mean field $B_0$, and phases of maximum and minimum field change from year to year. We hypothesize that possible reasons of those variations are stellar axial rotation or dynamo mechanisms.

2 pages, 1 figure, 1 table. To be published in conference proceedings of IAU Symposium 301: Precision Asteroseismology, August 2013, Wroclaw, Poland

References in corpus (1)

• Systematic detection of magnetic fields in massive, late-type supergiants

Cited by in corpus (1)

• The influential effect of blending, bump, changing period and eclipsing Cepheids on the Leavitt law