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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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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Calgi |
| Sað Açýklýk: | 19h23m57.45s |
| Yükselim: | +38°06'51.9" |
| Görünürdeki Parlaklýk: | 7.939 |
| Uzaklýk: | 240.964 parsek |
| özdevim Sað Açýklýk: | 7.4 |
| özdevim Yükselim: | 12.2 |
| B-T magnitude: | 8.239 |
| V-T magnitude: | 7.964 |
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