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Radial Velocities of Population II Stars. II.
A program for radial velocity measurements of Population II stars wasstarted in 1988 and was carried out during six observing runs. Theprogram includes metal-deficient stars, components of Population IIvisual binaries or common proper motion stars, suspected radial velocityvariables and the Population II stars from the Hipparcos program. Themeasurements were made with the 1 meter reflector at the MaidanakObservatory in Uzbekistan. The average error of a single measurement isabout 0.6 km/s, but for stars at 13 mag or for extremely metal-deficientstars the error is about 2.5 km/s. The catalog contains 621 measurementsfor 164 stars.
| Miscellaneous spectroscopic notes
Results of slit-spectrograph observations are reported for approximately260 stars. The data presented range from recognition of many new Ap, Am,and other unusual stars to H-alpha observations of early-typesupergiants and Be stars. The material discussed was obtained over thepast 40 years at a number of U.S. observatories and at the DominionAstrophysical Observatory in Victoria, B.C.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Vasak |
| Sað Açýklýk: | 07h37m17.70s |
| Yükselim: | +52°12'21.7" |
| Görünürdeki Parlaklýk: | 8.616 |
| Uzaklýk: | 10000000 parsek |
| özdevim Sað Açýklýk: | -0.3 |
| özdevim Yükselim: | -5.4 |
| B-T magnitude: | 9.306 |
| V-T magnitude: | 8.673 |
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