Period determinations for Southern Hemisphere red variables

Details Period determinations for Southern Hemisphere red variables Period determinations for Southern Hemisphere red variables

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93..898b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 93, April 1987, p. 898-906. Research supported by the University of Kansas.

Astronomy and Astrophysics

Astronomy

2

Binary Stars, Southern Sky, Stellar Color, Stellar Spectrophotometry, Variable Stars, Ephemerides, Light Curve, Spectrum Analysis, Stellar Luminosity, Stellar Magnitude

Scientific paper

As part of a search for binaries containing long-period, red variables in the Southern Hemisphere, the periods for ten such objects based on photographic and new photoelectric observations made within the last decade have been determined. Results for the three stars having no prior periods are as follows: FU Hya, 190 days; EI TrA, 274 days; and V1161 Sgr, 175 days. Finding charts and light curves for some of these variables are presented, and the uncertainties in the results discussed. The unreliability of predicted times of maximum brightness, based on older ephemerides, is demonstrated by showing such predictions to be in error by more than a quarter of a period in individual instances, when compared with results from recent observations.

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