The radius and other fundamental parameters of the F9 v star β Virginis

J. R. North, J. Davis, J. G. Robertson, T. R. Bedding, H. Bruntt, M. J. Ireland, A. P. Jacob, S. Lacour, J. W. O'Byrne, S. M. Owens, D. Stello, W. J. Tango, P. G. Tuthill

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19 Citations (Scopus)


We have used the Sydney University Stellar Interferometer (SUSI) to measure the angular diameter of the F9 V star β Virginis (β Vir). After correcting for limb darkening and combining with the revised Hipparcos parallax, we derive a radius of 1.703 ± 0.022 R (1.3 per cent). We have also calculated the bolometric flux from published measurements which, combined with the angular diameter, implies an effective temperature of 6059 ± 49 K (0.8 per cent). We also derived the luminosity of β Vir to be L = 3.51 ± 0.08 L (2.1 per cent). Solar-like oscillations were measured in this star by Carrier et al. and using their value for the large frequency separation yields the mean stellar density with an uncertainty of about 2 per cent. Our constraints on the fundamental parameters of β Vir will be important to test the theoretical models of this star and its oscillations.

Original languageEnglish
Pages (from-to)245-252
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Publication statusPublished - Feb 2009
Externally publishedYes


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