Rapid line variability. IV - Constancy of two reported variables

Details Rapid line variability. IV - Constancy of two reported variables Rapid line variability. IV - Constancy of two reported variables

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....78...11b&link_type=abstract

Astronomy and Astrophysics, vol. 78, no. 1, Sept. 1979, p. 11-14.

Astronomy and Astrophysics

Astrophysics

4

Spectral Line Width, Stellar Spectra, Variable Stars, Electrophotometers, Error Analysis, H Beta Line, Photons

Scientific paper

The stars Theta Peg and Sigma And (A2 V) were examined for equivalent-width variability with a time scale of several hours. Two hundred nineteen photoelectric spectra showed no equivalent-width variation in H-beta larger than the expected error from photon statistics, viz., + or - 0.7% per measurement. The present investigation therefore does not confirm the large variations reported by Antonello et al. (1978). A general formalism to calculate equivalent-width errors due to photon statistics is presented.

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