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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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Member of following groups:
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Observation and Astrometry data
| Constellation: | Lyra |
| Right ascension: | 18h42m24.18s |
| Declination: | +28°07'29.5" |
| Apparent magnitude: | 7.633 |
| Distance: | 294.985 parsecs |
| Proper motion RA: | 2.1 |
| Proper motion Dec: | -9.5 |
| B-T magnitude: | 7.615 |
| V-T magnitude: | 7.632 |
Catalogs and designations:
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NEWS@SKY (Science&Space News)
