PHOTOMETRIC OBSERVATIONS AND PERIOD CHANGES FOR THE THREE RR LYRAE TYPE STARS: DM CYG, V341 AQL and AV PEG

S. N. Udovichenko

Анотація


During observational period 2006-2007 the CCD photometric observation with V system for three RR Lyr type stars: DM Cyg, V341 Aql and AV Peg have been carried out. It was the light curves obtained and the maxima moments were determined. For the purpose of periods changes variation the graphics of O - C was plotted for long term intervals of time, containing several dozen of years, having applied the early published moments of light variations maxima. From these data the new elements for determine of light variations maxima was calculated.

Ключові слова


RR Lyrae - stars; individual (DM Cyg; AV Peg; V341 Aql).

Повний текст:

PDF (English)

Посилання


Agerer F.: 2003, IBVS, N 5485.

Ahnert P .: 1960, A V Pegasi. N.V.S., N 438.

Batyrev A.A.: 1975, Peremennye Zvezdy. Suppl., 2, N10.

Born F., Sofronievitsch H., Pohl E.: 1955, Astron. Nachr., 282 H.5.

Braune W., Hubscher J.: 1967, Astron.Nachr., 290, H.3.

Firmanyuk B.N.: 1976, IBVS, N 1152.

Fitch W.S., Wisniewski W.Z., Johnson H.L.: 1966, Comm. of the Lunar and Planetary Lab., The Univer. of Arizona, 1966, 5, N 71.

Hubscher J., Paschke A., Walter F.: 2005, IBVS, N5657.

Kholopov P .N., Samus N.N., Frolov M.C., Goransky V.P ., Gorynya N.A., Kireeva N.N., Kukarkina N.P ., Kurochkin N.E., Medvedev a G.I., Perova N.B., Shugarov S.Y u.: 1985, General catalogue of variable stars 1-3.

Le Borgne J.F., Klotz A.3, Boer M.: 2005, IBVS, N 5622.

Lysova L.E., Firmanyuk B.N.: 1980, Astron. Cyr., N 1122.

Pojmanski G.: 2002, Acta Astron., 52, 397.

Stepien K.: 1972, Acta Astron., 22, N 3.

Szeidl B., Olah K., Mizser A.: 1986, Comm. Konkoly Obs., N 89 (V ol.X, 3).

Tsessevich V.P .: 1966, RR Lyrae-type variable stars, Naukova Dumka, Kiev.




DOI: https://doi.org/10.18524/1810-4215.2007.20.87211

Посилання

  • Поки немає зовнішніх посилань.


Copyright (c) 2016 Odessa Astronomical Publications

Creative Commons License
Ця робота ліцензована Creative Commons Attribution-NonCommercial 4.0 International License.