Magnetic and pulsational variability of Przybylski’s star (HD 101065)

• DOI: 10.1093/mnras/sty889
• Publication Date: 2018-04-06T08:06:01Z
• Authors: S Hubrig; S P Järvinen; J Madej; V D Bychkov; I Ilyin; M Schöller; L V Bychkova
• Keywords: Rotation period; Star (game theory)

Since its discovery more than half a century ago Przybylski's star (HD101065) continues to excite the astronomical community by unusual nature of spectrum, exhibiting exotic element abundances. This was also first magnetic chemically peculiar A-type for which presence rapid oscillations established. Our analysis newly acquired and historic longitudinal field measurements indicates that is with respect extremely slow rotation. Adopting dipolar structure using sine wave fit all reported values over last 43yr, we find probable rotation period P_rot ~ 188yr, however has be considered tentative as it does not represent unique solution verified future observations. Additionally, based on our own spectropolarimetric material obtained HARPSpol, discuss impact anomalous atmosphere, in particular non-uniform horizontal vertical distributions chemical elements pulsational variability. Anomalies related abundance stratification Pr Nd are time used establish radial gradient.