On the variability of VEGA

Details On the variability of VEGA On the variability of VEGA

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..333f&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, June-July 1981, p. 333-337. Research supported by the Natural Scien

Astronomy and Astrophysics

Astronomy

16

Stellar Luminosity, Stellar Spectrophotometry, Variable Stars, Stellar Magnitude, Stellar Mass, Ubv Spectra

Scientific paper

The variability of Vega is investigated by direct telescopic (0.5-m) observation, and the results are compared with photometric studies. On two nights Vega was brighter than average by about 0.015 mag, and on one night by about 0.041 + or - 0.005 mag. Although there is evidence suggesting that Vega has occasionally shown definite radial pulsation, the brightening observed is nevertheless attributed to a variability similar to the Delta Scuti-type. Observations made simultaneously on Epsilon (1) Lyr and Epsilon (2) Lyr indicate a constancy to within 0.003 mag.

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