The magnetic variability of the $\beta$~Cep star $\xi^{1}$\,CMa

S. P. Järvinen; S. Hubrig; M. Schöller; I. Ilyin

doi:10.1016/j.newast.2018.01.005

The magnetic variability of the $\beta$~Cep star $\xi^{1}$\,CMa

Solar and Stellar Astrophysics 2018-01-23 v1

Authors: S. P. Järvinen , S. Hubrig , M. Schöller , I. Ilyin

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Abstract

$\xi^{1}$ CMa is a known magnetic star showing rotationally modulated magnetic variability with a period of 2.17937 d. However, recent work based on high-resolution spectropolarimetry suggests that the rotation period is longer than 30 years. We compare our new spectropolarimetric measurements with FORS 2 at the VLT acquired on three consecutive nights in 2017 to previous FORS 1/2 measurements of the longitudinal magnetic field strength. The new longitudinal magnetic field values are in the range from 115 to 240 G and do not support the presence of a long period.

Keywords

magnetic star beta cephei rotational modulation spectropolarimetry longitudinal magnetic field

Cite

@article{arxiv.1801.07017,
  title  = {The magnetic variability of the $\beta$~Cep star $\xi^{1}$\,CMa},
  author = {S. P. Järvinen and S. Hubrig and M. Schöller and I. Ilyin},
  journal= {arXiv preprint arXiv:1801.07017},
  year   = {2018}
}

Comments

5 pages, 4 figures, 1 table

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