Estimate of solar radius from fmode frequencies
Abstract
Frequency and rotational splittings of the solar fmodes are estimated from the GONG data. Contrary to earlier observations the frequencies of fmodes are found to be close to the theoretically computed values for a standard solar model. The fmode being essentially a surface mode is a valuable diagnostic probe of the properties of the solar surface, and also provides an independent measure of solar radius. The estimated solar radius is found to be about 0.03% less than what is traditionally used in construction of standard solar models. If this decrease in solar radius is confirmed then the current solar models as well as inversion results will need to be revised. The rotational splittings of the fmodes yield an independent measure of the rotation rate near the solar surface, which is compared with other measurements.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 February 1998
 DOI:
 10.48550/arXiv.astroph/9707226
 arXiv:
 arXiv:astroph/9707226
 Bibcode:
 1998A&A...330..336A
 Keywords:

 SUN: OSCILLATIONS;
 SUN: ROTATION;
 Astrophysics
 EPrint:
 5 pages, A&