Abstract
An attempt has been made to bring photoelectric and dynamical properties of the system to a common focus. The photoelectric properties are exhibited by a series of light curves in the blue and infrared produced from a series of observations made by G. E. Kronet al. from 1938 to 1948. An analysis of these reveals a decrease of the period of the order of magnitude 10−5.
A Fourier analysis of the light curves is employed to estimate the elements for the period represented by each curve. These results suggest a variation of the fractional radii over an eight-month period. Dynamical effects are ruled out and the result is seen to be the outcome of some photoelectric effect. A phenomenological discussion of the nature of these photoelectric effects is presented, showing that their origin may be in gas streams rather than spot effects.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Al-Naimiy, H. M. K.: 1976,Astrophys. Space Sci. 46, 261.
Batten, A. H.: 1973Binary and Multiple Systems of Stars, Pergamon Press, Oxford.
Catalano, M. and Rodono, S.: 1974,P.A.S.P. 86, 390.
Cester, B.: 1967,Mem. Soc. Astr. Italiana 38, 713.
Chambliss, C. R.: 1976,P.A.S.P. 88, 762.
Dadaev, A. N.: 1954,Izv. glav. astr. Obs. Pulkovo 19, 37.
Dugan, R. S. and Wright, F. W.: 1939, Princeton Univ. Contr., No. 19.
Günther, O.: 1959,Astr. Nachr. 285, 97, 105.
Hall, D. S.: 1974,P.A.S.P. 84, 323.
Hall, D. S.: 1975,Acta. Astr. 25.
Hall, D. S.: 1976,IAU Coll. No. 29 (in press).
Harper, R.: 1933,Journal R.A.S. Canada 27, 146.
Joy, A. H. and Wilson, R. E.: 1949,Ap. J. 109, 231.
Kopal, Z.: 1959,Close Binary Systems, Int. Astr. Series, Vol. 5, Chapman and Hall and John Wiley, London and New York.
Kopal, Z.: 1965, inIAU Coll. No. 3 of Comm. 27 and 42, Astronomisches Inst. der Univ. Erlangen-Nürnberg, Bd. IV, Nr. 40, p. 52.
Kopal, Z.: 1975a,Astrophys. Space Sci. 34, 431.
Kopal, Z.: 1975b,Astrophys. Space Sci. 35, 159.
Kopal, Z.: 1975c,Astrophys. Space Sci. 35, 171.
Kopal, Z.: 1975d,Astrophys. Space Sci. 36, 222.
Kopal, Z.: 1976,Astrophys. Space Sci. 40, 461.
Kopal, Z. and Shapley, M.: 1956,Jodrell Bank Ann. 1, 141 (cf. p. 209)
Kron, G.: 1947,P.A.S.P. 59, 261.
Martynov, D. J.: 1957, ‘Non-Stable Stars’,IAU Sympos. No. 3, (ed. G. H. Herbig) Cambridge Univ. Press.
Oliver, J. P.: 1975,P.A.S.P. 87, 695.
Piotrowski S. L., Rucinski, S. M., and Semeniuk, I.: 1974,Acta. Astr. 24, No. 4 389.
Plavec, M., Smetanová, M., and Pěkný, Z.: 1961, Bull. Astr. Inst. Czech.12, 117.
Popper, D. M.: 1967,Ap J. 212, L131.
Prendergast, K. H. and Taam, R. E.: 1974,Ap. J. 189, 125.
Rügemer, H.: 1931,Astr. Nachr. 245, 39.
Sanford, R.: 1951,Ap. J. 115, 299.
Schneller, H.: 1962, Mitt Budapest Sternwarte No. 53.
Struve, O.: 1952,P.A.S.P. 64, 20.
Wood, F. B.: 1946, Contr. from Princeton Univ. Obs., No. 21, 10.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Theokas, A.C. An analysis of the light changes of AR lacertae. Astrophys Space Sci 52, 213–235 (1977). https://doi.org/10.1007/BF00647165
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00647165