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Start Over Subject Alpha Andromedae

1. Search for rapid variability in spectrum of Alpha Andromedae: (Progress report)

Creator:
Zvarko, J., Žižňovský, J., Zboril, M., Hric, L., Polosukhina, N., Malanushenko, V., Rychkov, V., and Iliev, I.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
space research, short-term variability of CP stars, and Alpha Andromedae
Language:
Czech
Description:
Radial velocities of H2 - H9 abd Ca II K lines on 27 high dispersion (0.27 nm/mm) spectrograms of the HgMn-star Alpha Andromedae were measured, While radial velocities of Balmer lines show no significant changes, radial velocities of Ca II K line vary in the limits from 5 to 13 km/s. A frequency analysis of the Ca II K RV values leads to two different frequencies of 27.86 and 35.20 c/d. Their superposition results is a 196 min beat-phenomenon period. Halfwidth of the calcium line varies in the way which could be explained by nonradial oscillations.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public