Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...150...89g&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 150, no. 1, Sept. 1985, p. 89-96.
Astronomy and Astrophysics
Astrophysics
13
Emission Spectra, H Alpha Line, Mira Variables, Shock Waves, Stellar Luminosity, Stellar Spectra, Variable Stars, Absorption Spectra, High Resolution, Light Curve, Line Spectra, Mach Number, Photosphere, Signal To Noise Ratios
Scientific paper
High resolution (66 mA) of the H-alpha emission of Mira (Omicron Ceti) between maximum and after minimum luminosity with additional P(delta), Ti I and Sr II emissions, are reported. The H-alpha profile shows the same shape variations as those observed during the previous period, and the unidentified absorptions within emission around the luminosity maximum are still identical. The shock front velocity has a similar value (around 70 km/s) during the 1982/1983 and 1983/1984 periods and is constant until the luminosity minimum. The double P-Cygni types and double absorption lines observed just around the luminosity maximum are certainly apparent and due to ballistic motions close to the photosphere.
Bouchet Patrice
Ferlet Roger
Gillet Denis
Maurice Eric
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