Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-05-14
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
seven pages, eight pictures. Submitted to AN in Feb. 21st, accepted April 30th
Scientific paper
In this work we present detailed photometric results of the trapezium like galactic nearby OB clusters NGC 1502 and NGC 2169 carried out at the University Observatory Jena. We determined absolute $BVRI$ magnitudes of the mostly resolved components using Landolt standard stars. This multi colour photometry enables us to estimate spectral type and absorption as well as the masses of the components, which were not available for most of the cluster members in the literature so far, using models of stellar evolution. Furthermore, we investigated the optical spectrum of the components ADS 2984A and SZ Cam of the sextuple system in NGC 1502. Our spectra clearly confirm the multiplicity of these components, which is the first investigation of this kind at the University Observatory Jena.
Eisenbeiss Thomas
Freistetter Florian
Hohle Markus M.
Moualla M.
Mugrauer Markus
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