Oppositions-Ephemeride für 11 Parthenope

✍ Scribed by H. Osten

• Publisher: John Wiley and Sons
• Year: 1929
• Tongue: English
• Weight: 110 KB
• Volume: 237
• Category: Article
• ISSN: 0004-6337
• DOI: 10.1002/asna.19292370805

✦ Synopsis

If this be true it would seem difficult to avoid the conclusion that the variations of velocity so common in these stars are due largely to motions of expansion and contraction, rather than to orbital motion.

A very natural explanation of the reversal of motion between the absorption condition and one of emission is that increase of temperature resulting from contraction has caused. a general expansion accompanied by the breaking through of the vapors giving rise to the bright lines. Such expansion would manifest itself to an observer as a velocity of approach.

Observatorio Nacional Argentino, Cdrdoba, June 10, 1930 oh w.-Z. a Vera 8 Vera log I log A