IO Aqr: Twins just at turn off?

Details IO Aqr: Twins just at turn off? IO Aqr: Twins just at turn off?

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...417..689d&link_type=abstract

Astronomy and Astrophysics, v.417, p.689-693 (2004)

Astronomy and Astrophysics

Astrophysics

1

Eclipsing Binaries, Binaries: Spectroscopic, Stars: Individual: Io Aqr

Scientific paper

We present photometric and spectroscopic analysis of the eclipsing binary IO Aqr with orbital period 2.37 °. The system is detached, with similar almost spherical components. The star is classified as G0 spectral type. In the analysis we have used spectra obtained at a 2-m telescope with a Coudé spectrograph for two regions NaD and Hα, as well as ASAS I band photometry and R, V photometry obtained at a 0.4 m telescope. The model of the star was obtained using a code based on the Wilson-Devinney method. The radii of the stars for our best fit are R1=2.09±0.13 R&sun; and R2=2.54±0.06 R&sun; while the masses of the components are M1=1.53±0.02 M&sun; and M2=1.64±0.02 M&sun;. Both components are slightly evolved main sequence stars.
Based on spectroscopic observations collected at National Astronomical Observatory Rozhen, Bulgaria and David Dunlop Observatory, Canada.

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