Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mnras.333..952b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 333, Issue 4, pp. 952-960.
Astronomy and Astrophysics
Astronomy
11
Stars: Emission-Line, Be, Stars: Individual: Β Cephei, Stars: Individual: 19 Mon, Stars: Oscillations, Be, Stars: Individual: Β Cephei, Stars: Individual: 19 Mon, Stars: Oscillations
Scientific paper
We present an analysis of 555 high-dispersion echelle spectra of 19 Mon obtained from two sites as well as 115 Strömgren uvby observations. We show that three periodicities are present at 5.22994, 0.17019 and 4.88956cycled-1. The first periodicity has by far the largest amplitude. Photometric amplitude ratios and phase differences indicate an l=2 mode, while the line profile variations unequivocally point to l=2,m=-2. Because of the low amplitudes of the other two modes, very little can be said concerning them. Although 19 Mon was originally selected on the basis of its classification as a marginal Be star, the Be nature of the star is not supported by our observations.
Balona Luis A.
James David J.
Motsoasele P.
Nombexeza B.
Ramnath A.
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