Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...406l..15p&link_type=abstract
Astronomy and Astrophysics, v.406, p.L15-L18 (2003)
Astronomy and Astrophysics
Astrophysics
25
Stars: Fundamental Parameters, Stars: Oscillations, Stars: Evolution, Stars: Individual: Tau Cet
Scientific paper
We have determined from interferometry the radius of the nearby star tau Cet, using recent observations with the VINCI instrument on VLTI using the siderostats. The limb-darkened disk diameter is determined, with an unprecedented internal precision of 0.5%, to be 1.971 +/- 0.009_(int.)+/- 0.05_(ext.) mas, corresponding to a physical radius of 0.773 +/- 0.004_(int.)+/- 0.02_(ext.) Rsun. With this determination tau Cet becomes a prime target for asteroseismic campaigns to determine its internal structure, and thereby test stellar evolution theory. We discuss implications for asteroseismology and present predictions for oscillation properties.
Based on observations collected at the European Southern Observatory, Chile.
Christensen-Dalsgaard Joergen
Cunha Margarida S.
Garcia Joseph P.
Monteiro Mario J. P. F. G.
Pijpers Frank P.
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