Evolution of the periodicity of the W UMa system Epsilon CrA

Details Evolution of the periodicity of the W UMa system Epsilon CrA Evolution of the periodicity of the W UMa system Epsilon CrA

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...176..180m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 176, no. 1, April 1987, p. 180-182.

Astronomy and Astrophysics

Astrophysics

1

Eclipsing Binary Stars, Periodic Variations, Stellar Spectrophotometry, Stellar Mass Ejection, Ubv Spectra, Variable Stars

Scientific paper

Photometric uvby observations of Epsilon CrA obtained with the 1-m telescope at ESO during 1985 are compiled in tables along with published photometry from the period 1960-1984 and analyzed comprehensively. The results are presented in O-C diagrams and discussed, and a relative increase of 0.00001 in the period of the object is detected. It is pointed out that this change may have been gradual (over a 5-10-yr period) or abrupt (at about HJD 2,440,000), but that the period appears to have become stable again in the most recent observations.

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