EDP Sciences
Free access
Volume 368, Number 3, March IV 2001
Page(s) 1077 - 1082
Section The Sun
DOI http://dx.doi.org/10.1051/0004-6361:20010066

A&A 368, 1077-1082 (2001)
DOI: 10.1051/0004-6361:20010066

Solar radius determinations obtained with the CCD astrolabe at TUBITAK National Observatory

O. Golbasi1, 2, F. Chollet1, 3, 4, H. Kiliç2, V. Sinceac1, 2, Z. Aslan1, 2 and E. Sozen5

1  Tubitak National Observatory, Akdeniz University, Antalya, Turkey
2  Akdeniz University, Physics Dept., Antalya, Turkey
3  Paris Observatory, 61 avenue de l'Observatoire, 75014 Paris, France
4  3 rue de la Source Perdue, 91190 Gif-sur-Yvette, France
5  Kandilli Observatory, Istanbul, Turkey

(Received 20 November 2000 / Accepted 20 December 2000 )

This paper measures the solar radius, using the new Tubitak National Observatory astrolabe as well as data acquisition and reduction procedures. The mean values of the solar radius obtained are slightly lower than the other results to which they are compared. We have compared our results with data obtained since 1981, and show that our results are very homogeneous. We hope to extend these measurements to obtain accurate determinations of solar position.

Key words: Sun: general -- Sun: oscillations -- Sun: photosphere -- astrometry -- atmospheric effects

Offprint request: F. Chollet, fernand.chollet@wanadoo.fr

© ESO 2001