Physics
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978cokon..71....1o&link_type=abstract
Communications of the Konkoly Observatory, No. 71 (Vol. VII, 6), p. 1-87 (1978)
Physics
2
Scientific paper
Photographic and photoelectric observations obtained at Konkoly Observatory during the past 45 years are presented. Using all available observations the O-C diagrams of AT And, SU Dra, RR Leo, TT Lyn and AR Per are constructed. Period jumps are characteristic of AT And and TT Lyn. In the period of AT And two jumps occured: +710 x 10E-8 days in 1956 and -545 x 10E-5 days in 1962. The period of TT Lyn iis constant, but a jump of 8 x 10E-5 days might have been taken place in 1958. The O-C diagram of SU Dra consists of waves of small amplitude, the photoelectric maxima from 1955 were able to to be fitted by a straight line. The period of AR Per shows a constant increase with time at rate of 1.01 x 10E-8 days/year. The period of RR Leo also shows increase at a rate of 15.849 x 10E-8 days/year during the past 70 years. A more rigorous period analysis showed that cyclic variations with an amplitude of 0.006-0.007 days and with cycle length of 25000 epoch numbers were superimposed on the positive parabolic O-C diagram.
Oláh Katalin
Szeidl B.
No associations
LandOfFree
Period Changes of RR Lyrae Stars I. AT And, SU Dra, RR Leo, TT Lyn and AR Per does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Period Changes of RR Lyrae Stars I. AT And, SU Dra, RR Leo, TT Lyn and AR Per, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Period Changes of RR Lyrae Stars I. AT And, SU Dra, RR Leo, TT Lyn and AR Per will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-943896