Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...182..115c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 182, no. 1, Aug. 1987, p. 115-119.
Astronomy and Astrophysics
Astrophysics
16
Auriga Constellation, Pre-Main Sequence Stars, Stellar Envelopes, Stellar Rotation, Stellar Spectra, Stellar Winds, Carbon, Magnesium, Periodic Variations, Stellar Magnetic Fields, Stellar Mass Ejection
Scientific paper
In continuation of a time monitoring program devoted to short-term spectral variability in Herbig pre-main-sequence stars, new results are presented for the star AB Aur. On a one day time scale, the variability of the blue edge velocity of the Mg II 2795-A line is confirmed, and that of the C IV 1548-A line established. Since the observations cover only 6 days, and since the phase coverage is not tight enough, the new data can only support the periodic variability of Vs found previously (Praderie et al, 1986; Catala et al., 1986). Periods between 40 and 50 h are possible. Scenarios for the wind model of AB Aur are discussed.
Catala Claude
Felenbok Paul
Praderie Francoise
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