Other
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...445..148g&link_type=abstract
The Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 445, no. 1, p. 148-151
Other
8
Abundance, Cosmology, Gravitation Theory, Gravitational Constant, Solar Oscillations, Stellar Evolution, Variability, Gravitational Fields, Nuclear Reactions, Stellar Composition, Stellar Luminosity, Stellar Models, Stellar Temperature
Scientific paper
The sensitivity of the solar g-mode oscillation spectrum to variability in the universal gravitational constant G is described. Solar models in varying G cosmologies were constructed by evolving a zero-age main-sequence stellar model to the Sun's current age, while allowing the value of G to change according to the power law G(t) proportional to t-beta, where Beta approximately equals delta G/GH and H is the Hubble constant. All solar models were constrained to the observed luminosity and radius at the current age of the Sun by adjusting the helium abundance and the mixing-length parameter of the models in the usual way for standard stellar models. Low-l g-mode oscillation periods were calculated for each of the models and compared to the claimed observation of the solar g-mode oscillation spectrum by Hill & Gu (1990). If one accepts Hill & Gu's claims, then within the uncertainties of the physics of the solar model calculation, our models rule out all but (delta G/GH) less than approximately 0.05. In other words, we conclude that G could not have varied by more than 2% over the past 4.5 Gyr, the lifetime of the present-day Sun. This result lends independent support to the validity of the standard solar model.
Demarque Pierre
Guenther David B.
Krauss Lawrence M.
Sills Ken
No associations
LandOfFree
Sensitivity of solar g-modes to varying G cosmologies 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 Sensitivity of solar g-modes to varying G cosmologies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensitivity of solar g-modes to varying G cosmologies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1058996