Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jdso....5...78r&link_type=abstract
Journal of Double Star Observations, vol. 5, no. 2, p. 78-93.
Astronomy and Astrophysics
Astrophysics
Scientific paper
LIADA's (Liga Iberoamericana de Astronomía) Double Star Section presents angular separations, position angles as well as V magnitudes for 113 neglected visual double stars obtained in 2004. A total of 548 measures were averaged into 246 mean positions that range in separation from 2.6" to 421.9". Our observations were made by means of several techniques (CCD detectors, astrometric eyepieces and photographic and digital surveys). About 31% of the double stars were unconfirmed pairs discovered by John Herschel which remained neglected since before 1850. BVIJHK photometries, astrometric and kinematical data were used/obtained to determine astrophysical parameters (spectral types and luminosity classes, photometric distances, etc). Their nature was determined using several professional criteria classifying them as optical, physical or common origin pairs. Only 12 % were physical double stars. New systems were discovered.
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