Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-08T04:25:59.018Z Has data issue: false hasContentIssue false

Symbiotic Star AG Pegasi - Retrospect and Prospects

Published online by Cambridge University Press:  12 April 2016

D. Chochol*
Affiliation:
Astronomical Institute, Slovak Academy of Sciences 059 60 Tatranská Lomnica, Czechoslovakia

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Symbiotic star AG Peg (HD 207757), which is still declining from the outburst in the last century, appears to be related to the very slow RT Serpentis type novae: binary stars consisting of a cool M giant and a hot component, which underwent outburst.

AG Peg was ninth magnitude star before the year 1850. Then it slowly rised in brightness and reached fifth magnitude in 1885. After the sudden drop of brightness in 1892 due to the dust formation in expanding envelope, the star returned to the sixth magnitude and then it was continuously decreasing in brightness (Lundmark, 1921; Rigollet, 1947; Belyakina, 1968). Nowadays the decrease of brightness is 0.021 mag/yr (Fernie, 1985).

Type
Session 3. Physics of Individual Objects
Copyright
Copyright © Kluwer 1988

References

Belyakina, T.S.: 1968, Astron. Zh. 45, 139.Google Scholar
Belyakina, T.S.: 1970, Astrofizika 6, 49.Google Scholar
Belyakina, T.S.: 1985, Inform. Bull. Var. Stars No. 2697.Google Scholar
Boyarchuk, A.A.: 1966, Astron. Zh. 43, 976..Google Scholar
Chochol, B., Komárek, Z., Vittone, A.: 1987a, in The Symbiotic Phenomenon, eds. Mikolajewska, J., Friedjung, M., Kenyon, S.J. and Viotti, R., D. Reidel, Dordrecht, in press.Google Scholar
Chochol, D., Komárek, Z., Vittone, A.: 1987b, in Proc. of the 10. European Reginnal Astronomy Meeting, Prague, August 1987, in press.Google Scholar
Cowley, A., Stencel, R. : 1973, Astrophys. J. 184, 687.CrossRefGoogle Scholar
Feast, M.W., Catchnole, R.M., Whitelock, P.A., Garter, B.S., Roberts, G. : 1983, Mon. Not. Roy. Astron. Soc. 203, 373.CrossRefGoogle Scholar
Fernie, J.D.: 1985, Publ. Astron. Soc. Pacific 97, 653.CrossRefGoogle Scholar
Gallagher, J.S., Holm, A.V., Anderson, G.M., Webbink, R.F.: 1979, Astrophys. J. 229, 994.CrossRefGoogle Scholar
Garcia, M.R., Kenyon, S.J.: 1987, in The Symbiotic Phenomenon, eds. J. Mikolajewska, , Friedjung, M., Kenyon, S.J. and Viotti, R., D. Reidel, Dordrecht, in press.Google Scholar
Hjellming, R.M.: 1985, in Radio Stars, eds. Hjellming, R.M. and Gibson, D.M., D. Reidel, Dordrecht, p. 97.Google Scholar
Hutchings, J.B., Cowley, A.P., Redman, R.O.: 1975, Astrophys. J. 201, 404.Google Scholar
Kenyon, S.J., Fernandez-Castro, T.: 1987, Astron. J. 39, 938.Google Scholar
Kenyon, S.J., Truran, J.W. : 1983, Astrophys. J. 54, 229.Google Scholar
Kenyon, S.J., Webbink, R.F. : 1984, Astrophys. J. 279, 252.Google Scholar
Keyes, C.D., Plavec, M.J.: 1980a, in The universe at Ultra violet Wavelengths, ed. Chapman, R.D., NASA CP-2171, 443.Google Scholar
Keyes, C.D., Plavec, M.J.: 1980b, in IAU Symposium No. 88: Close Binary Stars: Observations and Interpretations, eds. Plavec, M.J., Pooper, D.M. and Ulrich, R.K., D. Reidel, Dordrecht, p. 365.Google Scholar
Kolotilov, E.A.: 1975, Astr. Tsirk. No. 865.Google Scholar
Kríž, S.: 1982, Bull. Astron. Inst. Czechosl. 33, 302.Google Scholar
Lundmark, K.: 1921, Astron. Nachr. 213, 93.Google Scholar
Meinunger, L.: 1981, Inform. Bull. Var. Stars, No. 2016.Google Scholar
Merrill, P.W.: 1916, Publ. Michigan Obs. 2, 71.Google Scholar
Merrill, P.W. : 1929, Astrophys. J. 69, 330.CrossRefGoogle Scholar
Merrill, P.W.: 1932, Astrophys. J. 75, 413.Google Scholar
Merrill, P.W. : 1942, Astrophys. J. 95, 386.CrossRefGoogle Scholar
Merrill, P.W. : 1951a, Astrophys. J. 113, 605.CrossRefGoogle Scholar
Merrill, P.W. : 1951b, Astrophys. J. 114, 338.Google Scholar
Merrill, P.W. : 1959, Astrophys. J. 129, 44.CrossRefGoogle Scholar
Penston, M.V., Allen, D.A.: 1985, Mon. Not. Roy. Astron. Soc. 212, 939.Google Scholar
Paul, H., Luthardt, R.: 1987, in The Symbiotic Phenomenon, eds. Mikolaiewska, J., Friedjung, M., Kenyon, S.J. and Viotti, R., D. Reidel, Dordrecht, in press.Google Scholar
Rigollet, R. : 1947, l’Astronomie, 61, 247.Google Scholar
Slovak, M.: 1987, in The Symbiotic Phenomenon, eds. Mikołajewska, J., Friedjung, M., Kenyon, S.J. and Viotti, R., D. Reidel, Dordrecht, in press.Google Scholar