Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93.1471s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 93, June 1987, p. 1471-1483. Research supported by the University of Calgary and NSE
Astronomy and Astrophysics
Astronomy
26
Astronomical Photometry, Early Stars, Eclipsing Binary Stars, Main Sequence Stars, Stellar Luminosity, Color-Magnitude Diagram, Light Curve, Starspots, Stellar Flares, Stellar Mass, Stellar Temperature
Scientific paper
UBVRI observations have been obtained of the 5.6 d double-lined, eclipsing binary HD 27130. Both primary and secondary eclipses were detected showing depths of 0.13 and 0.03 mag in V. The light curves display significant activity with the presence of a migrating 'photometric wave', an optical flare, and variations in the depth of the secondary eclipse. This activity is discussed in the context of starspots associated with both components. The Wilson-Devinney synthetic light-curve program was used to determine the absolute parameters of the system. The classification of the primary star is G8 V (V = 8.44 mag) and the secondary is likely K3-5 V (V = 10.74 mag). A distance modulus of 3.20 + or - 0.20 mag is found. Both components are significantly more massive than stars on the 'Sun-Sirius' mass-luminosity relation.
Milone Eugene F.
Schiller Stephen J.
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