A Dozen δ Scuti Stars in the Open Cluster NGC 1817
| Autor: | L. M. Freyhammer, Torben Arentoft, M. Y. Bouzid, C. Sterken, Søren Frandsen |
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| Rok vydání: | 2005 |
| Předmět: |
Physics
Single cluster Oscillation Astronomy Binary number Astronomy and Astrophysics Astrophysics Star (graph theory) Asteroseismology Stars Space and Planetary Science Cluster (physics) Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics Open cluster |
| Zdroj: | Publications of the Astronomical Society of the Pacific. 117:601-614 |
| ISSN: | 1538-3873 0004-6280 |
| Popis: | We obtained high-precision time-series observations of stars in the open cluster NGC 1817 in order to find d Scuti stars among the cluster members. The detection of 12 d Scuti stars, of which our data suggest that 11 are cluster members, makes NGC 1817 a key target for asteroseismology of 1.52.5 M, stars. One of the cluster member d Scuti stars is also an eclipsing binary, potentially offering very strong constraints for theoretical modeling. In addition, we find one d Scuti star candidate, a g Dor candidate, two variables of currently unknown type, and two eclipsing binary systems. We also describe a method for combining the oscillation frequencies of several d Scuti stars in a single cluster to obtain information about the order n of the excited modes. This method will eventually be used to constrain the theoretical models to be compared with precise oscillation frequencies determined from a future multisite campaign (asteroseismology). Online material: color figures |
| Databáze: | OpenAIRE |
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