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Pulsations of stellar models in H and He burning phases

Journal Article:

Abstract

A study of pulsational properties with evolution has been done for a 15.6 Msub(sun) star with Xsub(e)=0.90 and Ysub(e)=0.08. Pulsational properties in the hydrogen-burning stages have been compared with those in helium-burning stages. A comparison with observed characteristics of ..beta.. Cepheids, classical Cepheids and supergiant variables has been made during the course of its evolution. In addition, models of 5, 9, and 15 Msub(sun) with Xsub(e)=0.708, Ysub(e)=0.272 have also been studied for pulsational properties during the helium burning stage. It is also seen that pulsational instability is sensitive to changes in initial chemical composition and opacity parameters, n and s. A low helium abundance could be a reason for the stability of the models, even when lying in the instability strip of the H-R diagram.
Authors:
Gurm, H S; Sukhija, H M; Badalia, J K [1] 
  1. Punjabi Univ., Patalia (India). Dept. of Astronomy and Space Sciences
Publication Date:
Feb 01, 1983
Product Type:
Journal Article
Reference Number:
AIX-14-781511; EDB-83-189121
Resource Relation:
Journal Name: Astrophys. Space Sci.; (Netherlands); Journal Volume: 90:2
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; STAR MODELS; HELIUM BURNING; HYDROGEN BURNING; ABUNDANCE; PULSATIONS; STAR EVOLUTION; MATHEMATICAL MODELS; STAR BURNING; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
OSTI ID:
5549206
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: APSSB
Submitting Site:
HEDB
Size:
Pages: 261-276
Announcement Date:
Sep 01, 1983

Journal Article:

Citation Formats

Gurm, H S, Sukhija, H M, and Badalia, J K. Pulsations of stellar models in H and He burning phases. Netherlands: N. p., 1983. Web. doi:10.1007/BF00650062.
Gurm, H S, Sukhija, H M, & Badalia, J K. Pulsations of stellar models in H and He burning phases. Netherlands. doi:10.1007/BF00650062.
Gurm, H S, Sukhija, H M, and Badalia, J K. 1983. "Pulsations of stellar models in H and He burning phases." Netherlands. doi:10.1007/BF00650062. https://www.osti.gov/servlets/purl/10.1007/BF00650062.
@misc{etde_5549206,
title = {Pulsations of stellar models in H and He burning phases}
author = {Gurm, H S, Sukhija, H M, and Badalia, J K}
abstractNote = {A study of pulsational properties with evolution has been done for a 15.6 Msub(sun) star with Xsub(e)=0.90 and Ysub(e)=0.08. Pulsational properties in the hydrogen-burning stages have been compared with those in helium-burning stages. A comparison with observed characteristics of ..beta.. Cepheids, classical Cepheids and supergiant variables has been made during the course of its evolution. In addition, models of 5, 9, and 15 Msub(sun) with Xsub(e)=0.708, Ysub(e)=0.272 have also been studied for pulsational properties during the helium burning stage. It is also seen that pulsational instability is sensitive to changes in initial chemical composition and opacity parameters, n and s. A low helium abundance could be a reason for the stability of the models, even when lying in the instability strip of the H-R diagram.}
doi = {10.1007/BF00650062}
journal = {Astrophys. Space Sci.; (Netherlands)}
volume = {90:2}
journal type = {AC}
place = {Netherlands}
year = {1983}
month = {Feb}
}