Vardya, M. S. (1977) Color index and finite extent of the atmosphere Publications of the Astronomical Society of the Pacific, 89 (532). pp. 811-813. ISSN 0004-6280
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Official URL: http://www.jstor.org/pss/40677168
Related URL: http://dx.doi.org/10.1086/130232
Abstract
It has been found that the color index, in general, is not independent of radius, but is proportional approximately to five times the logarithm of the ratio of radii at the two wavelength bands. Two examples have been given, where this effect may be significant: (1) Large differences in effective temperatures, derived from two different color indices, may reflect the wavelength dependence of the radius. (2) Failure of and inconsistent results derived from the Wesselink method when applied to cepheid and other variable stars may be due to significant contribution from the change of the wavelength-dependent radius during the cycle.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to University of Chicago Press. |
| Keywords: | Color Index; Stars: Late-type Giant and Supergiants; Variables: Cepheid-atmosphere |
| ID Code: | 57462 |
| Deposited On: | 27 Aug 2011 15:11 |
| Last Modified: | 27 Aug 2011 15:11 |
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