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Interstellar polarization from observations of A and F stars in high and intermediate galactic latitudes, and from stars in the Mathewson and Ford polarization catalogue
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1986A&AS...64..487K&db_key=AST
| 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.
| Effects of rotation in the colour-magnitude diagrams of Praesepe and the Hyades.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971MNRAS.151..463S&db_key=AST
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Посматрања и Астрометриски подаци
| Сазвежђа: | Вајар |
| Ректацензија: | 00h12m12.96s |
| Deклинација: | -27°47'04.3" |
| Apparent магнитуда: | 8.245 |
| Даљина: | 101.937 parsecs |
| Proper motion RA: | 54.5 |
| Proper motion Dec: | 7.3 |
| B-T magnitude: | 8.796 |
| V-T magnitude: | 8.291 |
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