CCD photometry and astrometry of visual double stars

Details CCD photometry and astrometry of visual double stars CCD photometry and astrometry of visual double stars

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26as...96..137s&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 96, no. 1, p. 137-142.

Astronomy and Astrophysics

Astrophysics

3

Astrometry, Double Stars, Stellar Spectrophotometry, Charge Coupled Devices, Data Reduction, Stellar Color, Stellar Magnitude

Scientific paper

We present magnitude and color differences as well as separations and position angles of the component of 30 visual double and multiple systems with A-type primaries measured by means of a CCD detector attached to the 61 cm telescope on Cerro Las Campanas. The angular separation measured using the V filter rho(V) is systematically larger than the angular separation measured using the B filter rho(B). At least 20 percent of them have very similar astrophysical parameters, but the real separation of their components is larger than 0.01 parsecs. That means that these stars are not gravitationally bound, but they have a common origin.

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