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10 New γ Doradus and δ Scuti Stars
We present high-resolution spectroscopy and precision photometry of fivenew γ Doradus and five new δ Scuti variables. The five newγ Doradus variables substantially increase the number of confirmedstars of this class. All 10 stars fall in the spectral class rangeF0-F2, but they are cleanly separated into two groups by theirluminosity and photometric periods. However, the period gap between theγ Doradus and δ Scuti stars is becoming very narrow since weconfirm that HD 155154 is a γ Doradus star with the shortestperiods reported to date (the shortest of its four periods is ~0.312days). We do not find any evidence in our sample for stars exhibitingboth δ Scuti- and γ Doradus-type pulsations.
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Datos observacionales y astrométricos
| Constelación: | Lira |
| Ascensión Recta: | 18h42m24.18s |
| Declinación: | +28°07'29.5" |
| Magnitud Aparente: | 7.633 |
| Distancia: | 294.985 parsecs |
| Movimiento Propio en Ascensión Recta: | 2.1 |
| Movimiento Propio en Declinación: | -9.5 |
| B-T magnitude: | 7.615 |
| V-T magnitude: | 7.632 |
Catálogos y designaciones:
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