The effect of chemical abundance oscillations on the pulsational properties of a 5-solarmass hydrogen-helium star

Details The effect of chemical abundance oscillations on the pulsational properties of a 5-solarmass hydrogen-helium star The effect of chemical abundance oscillations on the pulsational properties of a 5-solarmass hydrogen-helium star

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.192..275u&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 192, no. 2, June 1992, p. 275-289.

Statistics

Computation

Abundance, Helium, Hydrogen, Interstellar Chemistry, Stellar Oscillations, Adiabatic Equations, Computational Astrophysics, Stellar Envelopes, Stellar Mass, Stellar Models

Scientific paper

A model of a first generation intermediate star of 5 M0, with Z = 0 has been considered. The model is at an advanced stage of its evolution and has a double shell burning. It burns helium in the inner shell, and hydrogen, via CNO cycle, in the outer shell. = ~ P)T and 8T = (~1og~/ôlog T)~ were computed allowing for the oscillations of the relative mass abundance of the reagents in nuclear reactions. Including jig, = (ologe/alogp)~ and ~- = (~ log ~ log T)~ of mean molecular weight and the effect of the oscillations of abundances due to nuclear reactions, stability was studied. Contrary to the results of the static calculations, we found that instability due to the excitation mechanism provided by the high temperature sensitivity of energy generation rate propagates up to the surface. Thus the model in question was found to be unstable against radial adiabatic pulsations, in its fundamental mode

Affiliated with

Also associated with

No associations

Rating

The effect of chemical abundance oscillations on the pulsational properties of a 5-solarmass hydrogen-helium star does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The effect of chemical abundance oscillations on the pulsational properties of a 5-solarmass hydrogen-helium star, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effect of chemical abundance oscillations on the pulsational properties of a 5-solarmass hydrogen-helium star will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1199729