Rotation of delta Scuti Stars in the Open Clusters NGC1817 and NGC7062

Details Rotation of delta Scuti Stars in the Open Clusters NGC1817 and NGC7062 Rotation of delta Scuti Stars in the Open Clusters NGC1817 and NGC7062

2009-07-05

arxiv.org/abs/0907.0812v1

Acta Astron.59:69-88,2009

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

21 pages, 7 figures, 1 on-line table

Scientific paper

We report results of spectroscopic and photometric observations of ten delta Scuti stars and one eclipsing binary in the open cluster NGC1817, and of ten delta Scuti stars and two other variables in the open cluster NGC7062. For all targets in NGC1817 and for three targets in NGC7062, the radial velocity and projected rotational velocity are determined. For all stars, the effective temperature and surface gravity is measured. Two delta Scuti stars, NGC1817-V1 and NGC7062-V1, and the eclipsing binary, NGC1817-V18, are discovered to be single-lined spectroscopic binaries. The eclipsing binary delta Scuti star NGC1817-V4 is discovered to be a double-lined spectroscopic binary. All delta Scuti stars which we observed spectroscopically are found to be moderate or fast rotators.

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