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J/A+A/328/235       AN Lyn light maxima (Rodriguez+ 1997)

Multiperiodicity in the atypical Delta Sct star AN Lyn Rodriguez E., Gonzalez-Bedolla S.F., Rolland A., Costa V., Lopez-Gonzalez M.J., Lopez de Coca P. <Astron. Astrophys. 328, 235 (1997)> =1997A&A...328..235R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry Keywords: stars: variables: δ Scu - stars: individual: AN Lyn - stars: oscillations - techniques: photometric Abstract: New uvby data collected of AN Lyn together with the reanalysis of old data establish that this star is a multiperiodic pulsator. Three independent frequencies (ν1=10.1756, ν2=18.1309 and ν3=9.5598c/d) and some interactions between them are found to be present in the light curve. Changes in amplitude with a large time scale are confirmed for the main frequency. Moreover, changes in amplitude are also present for the secondary frequencies, especially for ν3. After subtraction of the secondary frequencies from the light curves, the classical O-C method has been used to analyse the behaviour of the main period. A comparison is made between AN Lyn and the other two known δ Sct stars with atypical light curves, i.e., V1719 Cyg and V798 Cyg. New uvby data have been also collected for V1719 Cyg and the O-C method has been used to analyse the behaviour of the main period. It is found that the main pulsation of this star can be well described by means of a linear ephemeris with a period of P=0.26729700d over the last eighteen years. Finally, analysis of the different data sets available in the literature do not reveal significative changes in the amplitude of the main frequency of V1719 Cyg. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 09 14 28 +42 45.7 AN Lyn = BD+43 1894 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5 32 78 Times of light maxima of the Delta Scuti star AN Lyn table5.tex 80 88 LaTeX version of table5
Byte-by-byte Description of file: table5
Bytes Format Units Label Explanations
1- 2 I2 --- No Number of the light maximum 4- 15 F12.4 d HJD Heliocentric Julian Day of each light maximum 17- 22 I6 --- Cycle Corresponding cycle number 24- 30 F7.4 --- O-C Residual O-C 32 I1 --- Ref Reference (1)
Note (1): 1: Yamasaki et al., 1981PASP...93...77Y 2: Pensado, 1983 Bol. Astron. Obs. Madrid, Vol 11, No.2, 3 3: Yamasaki et al., 1983PASP...95..447Y 4: Agerer et al., 1983IBVS.2370....1A 5: Costa et al., 1984A&AS...57..233C 6: Rodriguez et al., 1997A&A...324..959R 7: present work
Acknowledgements: Eloy Rodriguez
(End) Patricia Bauer [CDS] 11-Dec-1997
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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