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Observational studies of Cepheids. II - BVRI photometry of 112 Cepheids
Over 4000 differentially determined photoelectric BVRI observations andthe resulting light curves are presented for 112 Cepheids accessiblefrom Northern Hemisphere observatories. The internal precision of thesedata is better than + or - 0.01 mag, and the accuracy of transformationto the Johnson BVRI system is nearly as good.
| An investigation of radius anomalies among short-period Cepheids
Simultaneous photometric and spectroscopic observations have beenobtained of two short-period Cepheids, SU Cas and TU Cas. The Wesselinkmethod of Barnes et al. was used to obtain radii. The radii are found toagree, within the expected error, with evolutionary values. Thisstrengthens the argument that the beat Cepheids are normal Cepheids inmixed-mode behavior rather than a separate class of objects and thatevolutionary masses and radii are correct.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Zincirli Prenses |
| Sað Açýklýk: | 00h23m16.98s |
| Yükselim: | +51°11'40.4" |
| Görünürdeki Parlaklýk: | 8.567 |
| Uzaklýk: | 277.008 parsek |
| özdevim Sað Açýklýk: | 11.8 |
| özdevim Yükselim: | -1.5 |
| B-T magnitude: | 9.781 |
| V-T magnitude: | 8.668 |
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