Light curves for ''bump Cepheids'' computed with a dynamically zoned pulsation code

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The dynamically zoned pulsation code developed by Castor, Davis, and Davison has been used to recalculate the Goddard model and to calculate three other Cepheid models with the same period (9.8 days). This family of models shows how the bumps and other features of the light and velocity curves change as the mass is varied at constant period. This study, with a code that is capable of producing reliable light curves, shows again that the light and velocity curves for 9.8-day Cepheid models with standard homogeneous compositions do not show bumps like those that are observed unless the mass is ... continued below

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Pages: 11

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Adams, T.F.; Castor, J.E. & Davis, C.G. January 1, 1978.

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Description

The dynamically zoned pulsation code developed by Castor, Davis, and Davison has been used to recalculate the Goddard model and to calculate three other Cepheid models with the same period (9.8 days). This family of models shows how the bumps and other features of the light and velocity curves change as the mass is varied at constant period. This study, with a code that is capable of producing reliable light curves, shows again that the light and velocity curves for 9.8-day Cepheid models with standard homogeneous compositions do not show bumps like those that are observed unless the mass is significantly lower than the ''evolutionary mass.'' The light and velocity curves for the Goddard model presented here are similar to those computed independently by Fischel, Sparks, and Karp. They should be useful as standards for future investigators.

Physical Description

Pages: 11

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • Conference on current problems in stellar pulsation instabilities, Greenbelt, MD, USA, 1 Jun 1978

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  • Report No.: LA-UR-78-1510
  • Report No.: CONF-780690-3
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6604873
  • Archival Resource Key: ark:/67531/metadc1197729

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • January 1, 1978

Added to The UNT Digital Library

  • July 3, 2018, 8:14 a.m.

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  • Feb. 25, 2019, 2:53 p.m.

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Adams, T.F.; Castor, J.E. & Davis, C.G. Light curves for ''bump Cepheids'' computed with a dynamically zoned pulsation code, article, January 1, 1978; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1197729/: accessed May 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.