High temporal resolution spectroscopic observations of UV Cet type flare stars
Inés Crespo-Chacón (Universidad Complutense de Madrid)
David Montes (Universidad Complutense de Madrid)
María Jose Fernández-Figueroa (Universidad Complutense de Madrid)
We present the results of a high temporal resolution spectroscopic
monitoring of different flare stars (UV Cet type). The observations were
done using the IDS spectrograph at the 2.5 m Isaac Newton Telescope (INT)
(La Palma). Intermediate resolution spectra, including the Balmer lines
from Hβ to H10 as well as the He i 4026 Å and the
Ca ii H & K lines, were taken using the R1200B dispersion grating
(reciprocal dispersion ≈ 0.48 Å/pixel). The great number of
spectra taken each night with high temporal resolution (15-60 s)
allows us to analyse the temporal evolution of the emission lines in
order to identify flares. Other variations at different
scales have been also studied.
For the
strongest flares, we study differences on the behaviour of the lines of
interest, in both the emission and profile.
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