http://arxiv.org/abs/1801.07017
$\xi^{1}$ 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.
S. Jarvinen, S. Hubrig, M. Scholler, et. al.
Tue, 23 Jan 18
28/85
Comments: 5 pages, 4 figures, 1 table