Observations and period studies of two neglected W UMa systems - V401 Cygni and Y Sextantis

Details Observations and period studies of two neglected W UMa systems - V401 Cygni and Y Sextantis Observations and period studies of two neglected W UMa systems - V401 Cygni and Y Sextantis

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..911h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 691, p. 911-914.

Astronomy and Astrophysics

Astronomy

10

Cygnus Constellation, Eclipsing Binary Stars, Light Curve, Photoelectricity, Variable Stars, Astronomical Observatories, Astronomical Photometry, Stellar Color

Scientific paper

Photoelectric timings of minima, obtained at KPNO, are reported for the short-period eclipsing variables V401 Cygni and Y Sextantis and a discussion of period variations is given based on all the material. V401 Cyg may be one of the few W UMa systems which exhibits a continuous, monotonic increase of the period. The period of Y Sex has been decreasing since the discovery of the variable, with the decrease occurring almost certainly in two abrupt changes.

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