Investigation of the rapid magnetic field variability in gamma Equ
| dc.creator | Bychkov, V. D. | |
| dc.creator | Bychkova, L. V. | |
| dc.creator | Madej, J. | |
| dc.date | 2005-03-11 | |
| dc.date.accessioned | 2026-07-07T02:17:12Z | |
| dc.date.available | 2026-07-07T02:17:12Z | |
| dc.description | We investigated magnetic variability of the roAp star gamma Equ (HD 201601) with high time resolution. Measurements of the stellar longitudinal magnetic field B_e were performed with the hydrogen line polarimeter and the 6-m optical telescope of Special Astrophysical Observatory on 20/21 August 1989. We obtained a single 3-hour series of 1720 rapid B_e measurements for this star with the average time resolution of 6.6 sec. The averaged value of <B_e> on this night equals -750 \pm 22 G. Both the power spectrum and the amplitude spectrum of the B_e time series essentially are flat. However, they show the presence of a marginally significant magnetic period at P_B = 3.596 min. which is real with the probability 67 %. The amplitude of the magnetic field variations with this period equals 347 \pm 31 G. We did not detect variations of B_e field in gamma Equ with the well-known photometric period, P_phot=12.44 min. | |
| dc.description | 12 pages, 3 figures, Acta Astronomica (in print) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0503278 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0503278 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/9087 | |
| dc.subject | Astrophysics | |
| dc.title | Investigation of the rapid magnetic field variability in gamma Equ | |
| dc.type | text |