Pulsating stars, spectroscopy and shock waves

Details Pulsating stars, spectroscopy and shock waves Pulsating stars, spectroscopy and shock waves

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983msngr..34...38g&link_type=abstract

ESO Messenger (ISSN 0722-6691), Dec. 1983, p. 38-41.

Physics

3

Shock Waves, Stellar Oscillations, Stellar Spectra, Variable Stars, H Alpha Line, Hertzsprung-Russell Diagram, Mira Variables

Scientific paper

Pulsating stars, which constitute an important group of variables, exhibit in their spectra a large number of intensity, shape, and emission variations that can be observed with modern high resolution spectrographs and which, being a consequence of the dynamic state of the stars' pulsating atmospheres, can reveal fundamental processes. After briefly assessing the pertinent emission line observations and their interpretation in terms of stellar atmosphere shock wave propagation, attention is given to the H-alpha emission of Mira Ceti, which is the brightest Mira star in the sky. It is shown that the emission profile intensity can be very different for each period.

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