Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006esasp.624e.114c&link_type=abstract
Proceedings of SOHO 18/GONG 2006/HELAS I, Beyond the spherical Sun (ESA SP-624). 7-11 August 2006, Sheffield, UK. Editor: Karen
Physics
Interferometry, Asteroseismology, Solar-Type Stars
Scientific paper
How important is an independent diameter measurement for the determination of stellar parameters of a solar-type star? If we can determine the radius of the star to between 1% and 4% how does this effect the theoretical uncertainties? Interferometry can provide this independent measurement and it has been suggested that we should expect at least a 4% precision on this measurement for solartype stars. This study aims to provide both qualitive and quantitive answers to the posed questions for a star such as our sun, one to which seismology can be applied. We find that the radius is fundamental for the determination of all stellar parameters and in particular the mass and the initial hydrogen abundance. Its influence depends not only on the size of the error in the radius but also on the errors in the seismic observables. The combination of observables available is also important for determining how influential the radius measurement can be.
Brown Ted M.
Creevey Orlagh L.
Metcalfe Travis Scott
Monteiro Mario J. P. F. G.
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