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The short-period Cepheid EU Tau. I - New photometric and radial-velocity data
New Johnson UBVRI and Cousins (RI)c photometry of EU Tau from threeobservatories are used to answer the outstanding questions surroundingthe pulsation period of this short-period Cepheid. These data providealmost complete phase coverage of the pulsation cycle. It is confirmedthat EU Tau is pulsating with a single period near 2.1 days in agreementwith that found previously by Fernie. Confusion in the literature aboutthe photometric indices of the comparison star BD 18959 deg near EU Tauis shown to arise largely from misidentifications of BD 18957 deg and BD18959 deg. New radial velocities for EU Tau are reported and compared toearlier observations with CORAVEL. Contemporaneous radial velocities andphotometric data are ideally suited to a surface-brightness analysis ofthis interesting Cepheid.
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| Takýmyýldýz: | Boga |
| Sað Açýklýk: | 05h44m53.27s |
| Yükselim: | +18°44'16.3" |
| Görünürdeki Parlaklýk: | 8.69 |
| özdevim Sað Açýklýk: | 4.5 |
| özdevim Yükselim: | -8.1 |
| B-T magnitude: | 8.692 |
| V-T magnitude: | 8.691 |
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