Magnetic Cepheids
Journal Article
·
· Astrophys. J.; (United States)
The role of a magnetic field in the pulsational behavior of classical Cepheids has been studied by computing linearized models of pulsating stellar envelopes pervaded by a well-tangled magnetic field. It is found that the ''pulsational'' masses of Cepheids that are implied by the theoretical values of the quantities Q/sub 0/, P/sub 1//P/sub 0/, and (possibly) P/sub 2//P/sub 0/ can be brought into line with the large ''evolutionary'' masses, if the pressure due to the postulated magnetic field is assumed to be comparable to the thermodynamic pressure everywhere in the pulsating layers. The field strengths that are required: several 10/sup 2/ gauss at the surface and several 10/sup 4/ gauss at the base: are quite reasonable from the point of view of the observed magnetic fields in Cepheids. The influence of the magnetic on the location of the blue edge of the instability strip in the H-R diagram is estimated to be very slight.
- Research Organization:
- NASA Goddard Institute for Space Studies
- OSTI ID:
- 5637360
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 233:4; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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