Line doubling in the 272-day long-period variable V CANCRI

Details Line doubling in the 272-day long-period variable V CANCRI Line doubling in the 272-day long-period variable V CANCRI

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.212..671d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 212, Feb. 1, 1985, p. 671-675.

Astronomy and Astrophysics

Astronomy

7

Absorption Spectra, Line Spectra, Stellar Spectra, Variable Stars, Atomic Spectra, Carbon Monoxide, Correlation, Fourier Transformation

Scientific paper

From Fourier Transform Spectra and high-dispersion optical spectra, the authors have measured doubled absorption lines of the CO molecule and various atomic species soon after three maxima of V Cnc. The velocity difference between doubled atomic features in the optical is 17.5 km s-1, while for CO at 2.3 μm the difference is 21 km s-1. The authors have assembled and compared the data for line doubling in long-period variables over the interval in period of 150 to 450 days. There is no correlation of the amplitude of doubling with period, but there is a correlation of doubling amplitude with the light amplitude as measured at 10400 Å. The relationships between these parameters and the theory of shock waves in long-period variables is discussed.

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