CHROMOSPHERIC ACTIVITY OF THE FLARE STAR YZ CMI IN QUIESCENCE ACCORDING TO THE FAST SPECTRAL MONITORING DATA

Автор(и)

  • I. A. Verlyuk Main Astronomical Observatory of National Academy of Sciences of Ukraine, Україна

DOI:

https://doi.org/10.18524/1810-4215.2016.29.85064

Анотація

Spectral monitoring of the flare star YZ CMi (U = 12.9, B = 12.7, V = 11.1) was carried out on the Zeiss-600 telescope at the Peak Terskol Observatory. We used a low resolution grating spectrograph with spectral resolution of ~ 100 Å and time resolution from 2 to 30 s. The spectra of the star in the quiescent state show variability in the lines Hβ, Hγ, Mg b, possibly in CaII K + Hε. Variations of the equivalent widths of the order of several percents were detected. The characteristic time of variations is about of a few minutes. The observed variations indicate the non-stationary activity of the flare star YZ CMi chromosphere in the quiescent state.

Stars; variability; methods: statistical; stars: late-type

Посилання

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Zhang X. et al.: 2008, in Proc. International Symposium on GPS/GNSS,

Tokyo, Japan, 11-14 November 2008, 127.

Torrence et al.: 1998, Bull. Amer. Meteor. Soc., 79, 61.

Stepanov A.V. et al.: 2005, Astron. Letters, 31, 684.

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Опубліковано

2016-12-01

Номер

Розділ

Астрофізика (зоряні атмосфери, взаємодіючі подвійні системи, змінні зорі)