Abstract
Preceding research on 172 B5V-A5V stars (Fracassiniet al., 1973) has been extended to cover 116 A5V-F5V stars of the catalogue of Geneva Observatory (Rufener, 1971), to test the validity of the method for later type stars. Figure 2 shows a satisfactory agreement between our results and those obtained by Gaposchkin (1958) using data from 82 eclipsing binary systems. Furthermore, our results also seem to confirm that the Sun has an absolute radius larger than that averaged from F5V-G0V stars. There is also a good agreement with the apparent radii of α Aql and α C Mi determined by Hanbury Brownet al. (1967, 1974). Three other stars, which are anomalous in the log α″ vsm vdiagram have been added to those selected in the preceding paper. No systematic differences among the absolute radii of stars of the same spectral type, in the Hyades, Pleiades and Praesepe, have been found.
Sommario
Una precedente ricerca su 172 stelle B5V-A5V (Fracassiniet al., 1973), è stata estesa a 116 steele A5V-F5V del catalogo dell'Osservatorio di Ginevra (Rufener, 1971) allo scopo di saggiare la validità del metodo per stelle di tipo più avanzato. La Figura 2 mostra l'accordo fra i nostri risultati e quelli ottenuti da Gaposchkin (1958) mediante 82 sistemi binari ad eclisse. In particolare anche i nostri risultati sembrano confermare che il Sole ha un raggio assoluto superiore al valor medio dedotto dai tipi spettrali F5V-G0V. Un buon accordo si ha anche con i valori dei raggi apparenti di α Aql e α C Mi ottenuti da Hanbury Brownet al. (1967, 1974). Altre stelle anomale nel diagramma log α″ vsm vvengono aggiunte a quelle riportate nel lavoro precedente. Nessuna differenza sistematica significativa è stata trovata fra i raggi assoluti di alcune stelle di eguale tipo spettrale nelle Iadi, Pleiadi e Presepe.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Carel de Strobel, G.: 1960,Ann. Astrophys. 23, 278.
Chalonge, D. and Divan, L.: 1950a,Compt. Rend. Acad. Sci. Paris 231, 331.
Chalonge, D. and Divan, L.: 1950b,Compt. Rend. Acad. Sci. Paris 230, 720.
Chalonge, D. and Divan, L.: 1952,Ann. Astrophys. 15, 201.
Chalonge, D.: 1966, in K. Lodén, L. O. Lodén, and U. Sinnerstad (eds.), ‘Spectral Classification and Multicolour Photometry’,IAU Symp. 24, 77.
Chalonge, D. and Divan, L.: 1973,Astron. Astrophys. 23, 69.
Crampin, J. and Hoyle, F.: 1960,Monthly Notices Roy. Astron. Soc. 120, 33.
Dufay, J.: 1964,Introduction to Astrophysics: The Stars, translated from the French by Owen Gingerich, Harvard College Observatory, George Newnes Ltd, London, p. 128.
Fracassini, M. and Pasinetti, L. E.: 1967,Atti XI Riunione S.A.It., Padova 7–9 Ottobre.
Fracassini, M., Gilardoni, G., and Pasinetti, L. E.: 1973,Astrophys. Space Sci. 22, 141.
Gaposchkin, S.: 1958, in S. Flügge (ed.), ‘Astrophysik’,Handbuch der Physik LI, 225, Springer Verlag, Berlin.
Hanbury Brown, R., Davis, J., Allen, L. R., and Rome, J. M.: 1967,Monthly Notices Roy. Astron. Soc. 137, 393.
Hanbury Brown, R., Davis, J., and Allen, L. R.: 1974,Monthly Notices Roy. Astron. Soc. 167, 121.
Johnson, H. L.: 1965,Astrophys. J. 141, 293.
Kopff, E.: 1943,Astron. Nachr. 274, 69.
Landolt-Börnstein: 1965,Astronomie und Astrophysik 1, Springer Verlag, Berlin, pp. 298 and 301.
Rufener, F. G.: 1971,Astron. Astrophys. Suppl. Ser. 3, No. 3.
Strand, K. E. (ed.): 1963,Stars and Stellar Systems 3, Univ. of Chicago Press, p. 269.
Wesselink, A. J.: 1969,Monthly Notices Roy. Astron. Soc. 144, 279.
Author information
Authors and Affiliations
Additional information
Thesis for the degree of Applied Physics.
Rights and permissions
About this article
Cite this article
Fracassini, M., Pasinetti, L.E. & Pelagatti, G. Apparent radii and other parameters for 116 A5V-F5V stars of the catalogue of Geneva Observatory. Astrophys Space Sci 35, 313–320 (1975). https://doi.org/10.1007/BF00637000
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00637000