OPTICAL POLARIZATION; STELLAR SPECTRA; STELLAR SPECTROPHOTOMETRY; SUPERGIANT STARS; VARIABLE STARS; X RAY STARS; CIRCULAR POLARIZATION; FOURIER ANALYSIS; LIGHT CURVE; NEUTRON STARS; PERIODIC VARIATIONS; POWER SPECTRA; X RAY SOURCES; ECLIPSING BINARY STARS
Abstract :
[en] Photometric observations of HD 153919 are presented, which indicate optical cyclic variations with an amplitude of up to 0.02 mag, and a strong dependence of the amplitude on the orbital plane. From power spectrum analysis, a value of 99.9 min from the observations of van Paradijs et al. (1978) has been determined for the characteristic period. In addition, evidence suggests a secular decrease of the period with a rate of decrease of -0.03 per year.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Kruszewski, A.; Warsaw University Observatory, Warsaw, Poland
Zalewski, J.; Warsaw University Observatory, Warsaw, Poland
Surdej, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Semeniuk, I.; Warsaw University Observatory, Warsaw, Poland ; European Southern Observatory, Geneva, Switzerland
Language :
English
Title :
Short-term optical variability of HD 153919 = 4U1700-37
Publication date :
1979
Journal title :
Acta Astronomica
ISSN :
0001-5237
Publisher :
Copernicus Foundation for Polish Astronomy, Warsaw, Poland
