CYCLE-TO-CYCLE VARIATIONS OF THE SYMBIOTIC BINARY R AQR
DOI:
https://doi.org/10.18524/1810-4215.1996.9.109565Ключові слова:
Stars, Binary, Pulsating, Symbiotic, R AqrАнотація
The observations of R Aqr from the AFOEV database are analyzed. The corrected value of the period P = 387509 ±0.029d was determined from a 5-th order trigonometric polynomial fit with a corresponding initial epoch for the maximum To =244473376 ±0.93d and asymmetry A =0.409 ±0.011. The cycle-to-cycle variations of the phase curve are present which are studied by using ”running parabolae”, ”running sines”, ”asymptotic parabolae” and ”linear fit” approximations. The range of variations is 5.7-8.01m (brightness at maximum), 10.6-12.3m (brightness at minimum), 7.1 - 34.1 days/mag (slope of the ascending branch at m : 9m); 25.7 - 44.6 days/mag (slope of the descending branch at m = 9m). The corresponding full amplitudes of the phase variations are 0.069; 0.136, 0.12o, 0.256, respectively. The most stable in phase is the maximum, for which no secular period variations detected, but a secondary cycle of P2=3955 ±50d and amplitude (0.032 ±0.005)P may be suggested. The characteristics of the individual cycles are tabulated.
Посилання
Andronov I.L.: 1990, Kinematika Fizika Nebesn. Tel, 6, N 6, 87.
Andronov I.L.: 1994, Odessa Astron. Publ, 7, 49.
Andronov I.L.: 1995, Bull. Ukr. As. Assoc., 7, 43.
Andronov I.L.: 1997, As. Ap. Suppl, 125.
Antonello E: 1994, As. Ap.t, 285, 140.
Boyarchuk A.A.: 1983, Itogi Nauki i Tehniki, VINITI (Moscow), 22, 83.
Chinarova LL: 1995, As. Ap. Transact, 9, 103.
Chinarova L.L., Andronov I.L., Schweitzer E.: 1994, Odessa Astron. Publ, 7, 103.
Friedjung M.: 1993, in: Cataclysmic Variables and Related Objects, eds. M.Hack, C. la Dous, NASA, 513-507, 647.
Eric L., Skepal A., Chochol D., Komzik R., Urban Z., Papousek J., Blanca C., Niarchos P., Rovithis-Livanieu H., Rovithis P., Chinarova L.L., Pikhun A.l., Tsvetkova K., Semkov E., Veliҁ Z., Schweitzer E.: 1994, Contr. Astron. Obs. Skalnate Pleso, 24, 31.
Kenyon S.J.: 1986, The Symbiotec Stars, Cambridge University Press, Cambridge.
Kholopov P.N., Samus’ N.N., Frolov M.S., Goranskij V.P., Gorynya N.A., Karitskaya E.A., Kazarovets E.V., Kireeva N.N., Kukarkina N.P., Medvedeva G.I, Pastukhova E.N., Perova N.B., Shugarov S.Yu.: 1985, General Catalogue of Variable Stars, 1, 376pp.
Kovacs G., Shlosman I., Buchler J.R.: 1986, Ap.J., 307, 593.
Kudashkina L.S., Andronov I.L.: 1996, Odessa Astron. Publ. 9, 127.
Kukarkin B.W., Parenago P.P: 1937, A.Zh., 14, 337.
Lepine J.R.D., le Squeren A.M., Scalise E. Jr.: 1978, Ap.J., 225, 869.
Marsakova V.I., Andronov LL.: 1996, Odessa Astron.Publ., 9, 127.
Matter J.A., Allen J.: 1979, J.R.A.S., Canada, 73, 173.
Peterson J.O.: 1986, As.Ap., 170, 59.
Schweitzer E.: 1996, ftp sdsarc.u-strasbg.fr/pub/afoev/aqr/r
Skopal A., Hric L., Urban Z., Pigulski A., Blanco Q, Papousek J., Hanzl D., Agerer F., Niarchos P., Rovithis-Livaneu H., Rovitis P., Tsvetkova K., Semkov E, Veliҁ, Z., Michalek F., Komacka L., Schweitzer E, Korth S.: 1992, Contrib. Astron. Obs, Skalnate Pleso, 22, 131.
##submission.downloads##
Опубліковано
Номер
Розділ
Ліцензія
Авторське право (c) 2017 Odessa Astronomical Publications
Ця робота ліцензується відповідно до Creative Commons Attribution-NonCommercial 4.0 International License.
Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року
