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Intermediate band photometry of late-type stars. II - Some stellar groups
Observations on the (R, I) system and a modified Stromgren system ofmembers of six stellar groups are used to demonstrate the chemicalhomogeneity of some 70% or 80% of the members assigned to the groups onthe basis of kinematics. The groups discussed are the Hyades, Wolf 630,Arcturus, Groombridge 1830, and Kapteyn's Star Groups as well as ananonymous group of a half dozen subdwarfs with (U, V) near (-150, -320)km/s. Standards for a previously described photometric system areextended, and additional F- and G-type standards for the (R, I) systemare presented. A simple relation is derived for computing the Fe/Habundance ratio for most stars in the corrected (R-I) interval from +0.2to +0.45 magnitude.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Tukan |
| Sað Açýklýk: | 00h22m31.57s |
| Yükselim: | -63°40'39.3" |
| Görünürdeki Parlaklýk: | 9.098 |
| özdevim Sað Açýklýk: | -15.1 |
| özdevim Yükselim: | -25.3 |
| B-T magnitude: | 9.633 |
| V-T magnitude: | 9.143 |
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