UDC 53
UDC 520
UDC 521
UDC 523
UDC 524
UDC 52-1
UDC 52-6
CSCSTI 41.00
CSCSTI 29.35
CSCSTI 29.31
CSCSTI 29.33
CSCSTI 29.27
CSCSTI 29.05
Russian Classification of Professions by Education 03.06.01
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.04.03
Russian Library and Bibliographic Classification 2
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 614
Russian Trade and Bibliographic Classification 6135
BISAK SCI004000 Astronomy
BISAK SCI005000 Physics / Astrophysics
The star GY And (HD 9996) belongs to a very rare and poorly studied class of super-slowly rotating Ap (ssrAp) stars. The main difficulty in conducting studies of such stars is their unusually long periods, often amounting to tens or even hundreds of years. Based on long-term magnetic monitoring conducted at the 1-m telescope of the SAO RAS and photometric monitoring carried out at the 60-cm telescope of the Southern Station of the SAI, the period (which is just over 23 years) and the parameters of magnetic and photometric variability of GY And (HD 9996) have been clarified.
stars: magnetic field, rotation
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