Statistics – Computation
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195..811f&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 195, June 1981, p. 811-824.
Statistics
Computation
35
Hydrodynamics, Planetary Nebulae, Stellar Atmospheres, Stellar Evolution, Stellar Mass Ejection, Stellar Models, Stellar Oscillations, Hydrogen Ions, Lagrange Coordinates, Light Curve, Periodic Variations, Shock Wave Propagation, Spectrum Analysis, Supergiant Stars, Variable Stars
Scientific paper
To investigate the theory of stellar evolution, numerical methods of radioactive hydrodynamics are used to study the pulsations of the planetary nebula core, FG Sge. Initial model parameters (1 solar mass, 3200 solar luminosities, and effective temperatures of 5500 K) are presented, and the formation of a cold extended envelope, during the growth of the pulsation amplitude, is obtained. The interaction between the pulsations and the extended atmosphere is seen to cause powerful, quasi-periodic shock waves, which are responsible for the mass loss. Energy loss due to ionization, dissociation, and radiative cooling is estimated and its value is compared with the energy loss due to artificial viscosity. A quasi-periodic light curve is obtained computationally, which agrees qualitatively with the observed curve; the cause of the quasi-periodicity of the light curve is also the interaction between the pulsations and the extended envelope.
Fadeev Iu. A.
Tutukov Aleksandr V.
No associations
LandOfFree
A hydrodynamical model of FG Sagittae pulsations 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 A hydrodynamical model of FG Sagittae pulsations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A hydrodynamical model of FG Sagittae pulsations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-994779