On the period of the eclipsing binary KT Hydrae

Details On the period of the eclipsing binary KT Hydrae On the period of the eclipsing binary KT Hydrae

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93.1251s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 93, May 1987, p.1251-1252.

Astronomy and Astrophysics

Astronomy

1

Eclipsing Binary Stars, Periodic Variations, Stellar Spectra, Ephemerides, Power Spectra, Spectrum Analysis

Scientific paper

A reanalysis of published archival material on eclipses in the binary system KT Hydrae indicates that a period analysis is biased unduly by the two oldest observations. This is attributed to an error of - 0.5 day in the Julian Dates adopted for these observations. Allowing for this error leads to a revised linear ephemeris (HJD 2444669.730 + 3.387004.E) from which the 0 - C residuals are not significantly greater than the uncertainty in the timing of the individual minima. The archival material does not, therefore, support a previous claim that the period of KT Hydrae has been variable over the past century.

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