2004A&A...415..661H


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.14CEST14:09:07

2004A&A...415..661H - Astronomy and Astrophysics, volume 415, 661-669 (2004/2-4)

Measurements of magnetic fields over the pulsation cycle in six roAp stars with FORS1 at the VLT.

HUBRIG S., KURTZ D.W., BAGNULO S., SZEIFERT T., SCHOELLER M., MATHYS G. and DZIEMBOWSKI W.A.

Abstract (from CDS):

With FORS1 at the VLT we have tried for the first time to measure the magnetic field variation over the pulsation cycle in six roAp stars to begin the study of how the magnetic field and pulsation interact. For the star HD 101065, which has one of the highest photometric pulsation amplitudes of any roAp star, we found a signal at the known photometric pulsation frequency at the 3σ level in one data set; however this could not be confirmed by later observations. A preliminary simple calculation of the expected magnetic variations over the pulsation cycle suggests that they are of the same order as our current noise levels, leading us to expect that further observations with increased S/N have a good chance of achieving an unequivocal detection.

Abstract Copyright:

Journal keyword(s): stars: magnetic fields - stars: oscillations - stars: chemically peculiar

Simbad objects: 9

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Number of rows : 9

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 V* DO Eri a2* 03 55 16.1314636284 -12 05 56.729555672 6.35 6.32 6.00     A9VpSrEuCr 383 0
2 HD 83368 a2* 09 36 25.40686 -48 45 04.2549   6.480 6.232     A8VSrCrEu+F9V 259 0
3 V* KQ Vel a2* 10 55 01.0018015910 -42 15 04.062281118 5.78 6.03 6.11     Ap(SiCr) 124 0
4 V* V816 Cen dS* 11 37 37.0411005456 -46 42 34.875395453 8.99 8.79 8.03     F8/G0p 299 0
5 * alf Cir a2* 14 42 30.4195804 -64 58 30.493451 3.55 3.43 3.19 2.96 2.86 A7VpSrCrEu 339 0
6 * 33 Lib a2* 15 29 34.7422042672 -17 26 27.375775287 7.22 7.07 6.69     F0VspEuGdSr 240 0
7 V* V694 CrA a2* 18 12 25.8347315452 -37 45 09.274292137   8.34 7.92     ApSrCrEu 108 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
9 V* BP Gru a2* 23 01 46.8212643426 -44 50 26.878058323   7.99 7.52     ApSrSi: 120 0

    Equat.    Gal    SGal    Ecl

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2021.04.14-14:09:07

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