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Estimation of stellar intrinsic colours, distances and colour excesses based on the Stromgren and H-beta photometry of 804 B, A, and F stars in 10 Selected Areas
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1989A&AS...78..105F&db_key=AST
| Four-colour UVBY and H-beta photometry of all A and F stars brighter than MPG of about 11.0 mag in 4 Selected Areas at intermediate galactic latitudes
As a second part of an investigation of the distribution of interstellardust in the solar vicinity, uvby-beta photometry has been obtained for260 stars of spectral types A and F, and brighter than mpg of11.0 mag in four Kapteyn's Selected Areas. The observed areas are: SA95, SA 120, SA 168, and SA 200. They are centered at intermediategalactic latitudes, in the range from b of about -38 deg to -42 deg.From the observed (b-y) versus beta diagrams it can be seen that starsin SA 95 are strongly affected by reddening, while the other areas showvery little absorption.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Irmak |
| Sað Açýklýk: | 04h17m25.94s |
| Yükselim: | -13°28'45.6" |
| Görünürdeki Parlaklýk: | 8.371 |
| Uzaklýk: | 308.642 parsek |
| özdevim Sað Açýklýk: | -0.4 |
| özdevim Yükselim: | -10.6 |
| B-T magnitude: | 8.663 |
| V-T magnitude: | 8.396 |
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