Other
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980cpsp.book..135c&link_type=abstract
In NASA. Goddard Space Flight Center Current Probl. in Stellar Pulsation Instabilities p 135-174 (SEE N80-25229 15-90)
Other
3
Cepheid Variables, Stellar Luminosity, Stellar Mass, Supergiant Stars, Convective Flow, Hydrostatic Pressure, Lyra Constellation, Nonlinearity, Stellar Envelopes, Unsteady Flow
Scientific paper
Some important problems in the theory of Cepheids and of other types of variables are pointed out. Three of these are: (1) large-amplitude mode behavior; (2) convection; and (3) Cepheid masses, which must essentially always be inferred indirectly. Of the several types of indirect mass which can be defined, the inferred masses of the 'beat (or double-mode) Cepheids,' seem to be smaller than one expects for this period range by factors of 2-3. For the nonbeat Cepheids, the indirect masses also appear to be low as compared with conventional stellar evolution theory, but by a smaller amount, say some 20-40 percent. Some conceivable ways of explaining these mass discrepancies are discussed. The question of whether the apparently predominantly radial pulsations of the beat Cepheids could be contaminated with a small admixture of nonradial pulsations, so that the use of purely radial pulsation theory may not be applicable to the beat Cepheids is addressed. Some other conjectures which may bear on ordinary or beat Cepheids are offered.
No associations
LandOfFree
Recent theoretical work on Cepheids and other types of variables does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Recent theoretical work on Cepheids and other types of variables, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recent theoretical work on Cepheids and other types of variables will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1359242