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Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I.
We have embarked on a project, under the aegis of the Nearby Stars(NStars)/Space Interferometry Mission Preparatory Science Program, toobtain spectra, spectral types, and, where feasible, basic physicalparameters for the 3600 dwarf and giant stars earlier than M0 within 40pc of the Sun. In this paper, we report on the results of this projectfor the first 664 stars in the northern hemisphere. These resultsinclude precise, homogeneous spectral types, basic physical parameters(including the effective temperature, surface gravity, and overallmetallicity [M/H]), and measures of the chromospheric activity of ourprogram stars. Observed and derived data presented in this paper arealso available on the project's Web site.
| Photometrie de la comete Arend-Roland.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Baliklar |
| Sað Açýklýk: | 00h20m49.77s |
| Yükselim: | -00°52'16.0" |
| Görünürdeki Parlaklýk: | 9.273 |
| Uzaklýk: | 21.404 parsek |
| özdevim Sað Açýklýk: | -2.5 |
| özdevim Yükselim: | -8.9 |
| B-T magnitude: | 9.723 |
| V-T magnitude: | 9.311 |
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