The Stellar Heavens An Introduction to the Study of the Stars And Nebul
The Stellar Heavens An Introduction to the Study of the Stars And Nebul
J Ellard John Ellard Gore
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Period, 12*91 days. Velocity, 112 miles a second. Keeler and Vogel agree that the supposed orbit is incompatible with the occurrence of eclipses 1 Astrophysical Journal, June, 1901. 32 36 THE STELLAR HEAVENS as in the case of Algol. Vogel, however, is ' convinced that /3 Lyras represents a binary or multiple system, the fundamental revolutions of which in 12 d. 22 h. In some way control the light change, while the spectral variations, although intimately asso- ciated with the star's phases, are... subject to complicated disturb- ances, running through a cycle perhaps measured by years. ' G. W. Myers finds that the mass of the larger component is probably 21 times that of the sun, and that of the smaller 9! times the solar mass. The mean density of the system is about the same as that of our atmosphere, so that the com- ponents are ' in a nebulous condition. 3 They revolve nearly in contact, and are probably surrounded by extensive atmospheres. Spectrum B 2 A (Composite). t] Aquilaa : Period, 7*18 days.
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