Pulsation properties of upper-main-sequence stars
Journal Article
·
· Astrophys. J., v. 201, no. 2, pp. 387-391
OSTI ID:4108488
The pulsation properties of zero-age main-sequence stars having an initial chemical composition X=0.72, Y=0.25, Z=0.03 are determined for stars in the mass range 10less than or equal toM/M/sub sun/less than or equal to110. Radial and nonradial modes (l=1,2) are considered in some detail. It is found that for this composition pulsational instability occurs only in the radial fundamental mode for Mapproximately-greater-than60M/sub sun/. All nonradial modes examined are found to be stable, as are the radial harmonic oscillations. At the onset of instability, the ratio of the fundamental radial mode to the radial first harmonic, or nonradial p$sub 1$ mode, is very nearly 2. It is suggested that this commensurability leads to mode coupling which may dissipate the pulsation energy of the unstable radial mode. (AIP)
- Research Organization:
- Univ. of Colorado, Boulder
- NSA Number:
- NSA-33-017991
- OSTI ID:
- 4108488
- Journal Information:
- Astrophys. J., v. 201, no. 2, pp. 387-391, Journal Name: Astrophys. J., v. 201, no. 2, pp. 387-391; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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