On the stability of the 13.2 minute oscillation of V1223 Sagittarii

Details On the stability of the 13.2 minute oscillation of V1223 Sagittarii On the stability of the 13.2 minute oscillation of V1223 Sagittarii

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...323..672j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 323, Dec. 15, 1987, p. 672-677. Research supported by the Fundacao de Ampar

Astronomy and Astrophysics

Astrophysics

15

Astronomical Photometry, Sagittarius Constellation, Stellar Oscillations, White Dwarf Stars, X Ray Binaries, Exosat Satellite, Late Stars, Light Curve, Stellar Models, Stellar Orbits, Stellar Spectra

Scientific paper

Partial results of a photometric program covering seven consecutive observational seasons on the intermediate polar V1223 Sgr are reported here. The period of the 13.2-min oscillation of V1223 Sgr increased with a time derivative of +2.8 x 10 to the -11th since its discovery. An improved ephemeris for predicting the times of maximum light of the orbital modulation is also obtained. Some possible alternatives for the structure of the system are discussed.

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