Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Superfast Stellar Pulsations from O to A Stars. / Холтыгин, Александр Федорович; Моисеева, А.В.; Якунин, И.А.; Бурлак, Марина Андреевна; Рыспаева, Елизавета Борисовна; Циопа, О.А.; Курдоякова, Марина Станиславовна.
в: Geomagnetism and Aeronomy, Том 62, № 8, 01.12.2022, стр. 1136-1140.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - Superfast Stellar Pulsations from O to A Stars
AU - Холтыгин, Александр Федорович
AU - Моисеева, А.В.
AU - Якунин, И.А.
AU - Бурлак, Марина Андреевна
AU - Рыспаева, Елизавета Борисовна
AU - Циопа, О.А.
AU - Курдоякова, Марина Станиславовна
PY - 2022/12/1
Y1 - 2022/12/1
N2 - New results of our studies of superfast variability on the minute and second scales of line profiles in the spectra of early type stars are presented. The spectra of program BA stars were obtained with the 1.25-meter telescope of the Crimean SAI station with exposures from 1.5 to 20 seconds and a total observation time of 2-3 hours. The variability of Hβ and Hα line profiles in spectra of program stars is analyzed. The studied stars have regular line profile variations with periods from 5 to 90 minutes and amplitudes of 0.5-2% of the continuum level. For better understanding the superfast variability of BA stars the X-Ray spectra and X-Ray light curves of selected Be stars obtained on the XMM-Newton satellite are analyzed. The variability of X-ray fluxes for HD 110 432, the analogue of γ Cas stars, on minute time scales is detected. It is shown that a nonthermal contribution into X-rays of the γ Cas analogues can be significant.
AB - New results of our studies of superfast variability on the minute and second scales of line profiles in the spectra of early type stars are presented. The spectra of program BA stars were obtained with the 1.25-meter telescope of the Crimean SAI station with exposures from 1.5 to 20 seconds and a total observation time of 2-3 hours. The variability of Hβ and Hα line profiles in spectra of program stars is analyzed. The studied stars have regular line profile variations with periods from 5 to 90 minutes and amplitudes of 0.5-2% of the continuum level. For better understanding the superfast variability of BA stars the X-Ray spectra and X-Ray light curves of selected Be stars obtained on the XMM-Newton satellite are analyzed. The variability of X-ray fluxes for HD 110 432, the analogue of γ Cas stars, on minute time scales is detected. It is shown that a nonthermal contribution into X-rays of the γ Cas analogues can be significant.
UR - https://ui.adsabs.harvard.edu/abs/2022Ge%26Ae..62.1136K/abstract
U2 - 10.1134/S0016793222080126
DO - 10.1134/S0016793222080126
M3 - Article
VL - 62
SP - 1136
EP - 1140
JO - Geomagnetism and Aeronomy
JF - Geomagnetism and Aeronomy
SN - 0016-7932
IS - 8
ER -
ID: 104090181