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Differential population synthesis of early-type galaxies. I - Spectrophotometric atlas of synthesis standard spectra
Continuous spectrophotometry has been obtained for 200 objects at aresolution of 10-17 A over the wavelength region 3600-10,000 A.Kron-Cousins BVRI colors are computed from the spectra and compared withpublished photoelectric photometry. The (V - R)C color index is used togroup the individual observations to form synthesis standard spectra for48 common spectral types. The standard groups include a solar abundancesequence of most spectral types and luminosity classes, metal-rich andmetal weak G - K giant-branch sequences, and horizontal-branch giants.The variations with color, luminosity, and metallicity of severalprominent line strengths are discussed. The spectral atlas is availableas a FITS magnetic tape.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Irmak |
| Sað Açýklýk: | 03h34m42.40s |
| Yükselim: | -16°14'10.4" |
| Görünürdeki Parlaklýk: | 8.94 |
| Uzaklýk: | 188.324 parsek |
| özdevim Sað Açýklýk: | -4.8 |
| özdevim Yükselim: | -29.5 |
| B-T magnitude: | 10.156 |
| V-T magnitude: | 9.041 |
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