2018MNRAS.477.3791H


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.15CEST08:16:36

2018MNRAS.477.3791H - Mon. Not. R. Astron. Soc., 477, 3791-3800 (2018/July-1)

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

HUBRIG S., JARVINEN S.P., MADEJ J., BYCHKOV V.D., ILYIN I., SCHOLLER M. and BYCHKOVA L.V.

Abstract (from CDS):

Since its discovery more than half a century ago Przybylski's star (HD 101065) continues to excite the astronomical community by the unusual nature of its spectrum, exhibiting exotic element abundances. This star was also the first magnetic chemically peculiar A-type star for which the presence of rapid oscillations was established. Our analysis of newly acquired and historic longitudinal magnetic field measurements indicates that Przybylski's star is also unusual with respect to its extremely slow rotation. Adopting a dipolar structure for the magnetic field and using a sine wave fit to all reported longitudinal magnetic field values over the last 43 yr, we find a probable rotation period Prot ≃ 188 yr, which however has to be considered tentative as it does not represent a unique solution and has to be verified by future observations. Additionally, based on our own spectropolarimetric material obtained with HARPSpol, we discuss the impact of the anomalous structure of its atmosphere, in particular of the non-uniform horizontal and vertical distributions of chemical elements on the magnetic field measurements and the pulsational variability. Anomalies related to the vertical abundance stratification of Pr and Nd are for the first time used to establish the presence of a radial magnetic field gradient.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - stars: chemically peculiar - stars: individual: Przybylski's star - stars: magnetic field - stars: oscillations - stars: rotation

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 965 * 00 14 04.0647520206 -00 02 00.101552192   8.94 8.57     ApSrEuCr 60 0
2 V* GY And a2* 01 38 31.8241484792 +45 23 58.950612500   6.343 6.380     A2:VpSiSrCrEu 245 0
3 V* DO Eri a2* 03 55 16.1314636284 -12 05 56.729555672 6.35 6.32 6.00     A9VpSrEuCr 383 0
4 HD 41403 * 06 05 02.2364746310 +02 06 37.100081640   7.68 7.63     ApEuCr 28 0
5 V* V816 Cen dS* 11 37 37.0411005456 -46 42 34.875395453 8.99 8.79 8.03     F8/G0p 299 0
6 V* AX CVn a2* 12 39 16.8607725899 +35 57 07.052954412   6.466 6.385     A0pSrCrEuKsn 164 0
7 * 33 Lib a2* 15 29 34.7422042672 -17 26 27.375775287 7.22 7.07 6.69     F0VspEuGdSr 240 0
8 * gam Equ a2* 21 10 20.5001160337 +10 07 53.682085548 5.03 4.94 4.68 4.43 4.32 A9VpSrCrEu 522 0

    Equat.    Gal    SGal    Ecl

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2021.04.15-08:16:36

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