| DOI | Resolve DOI: https://doi.org/10.1126/science.1201762 |
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| Author | Search for: Derekas, A.; Search for: Kiss, L. L.; Search for: Borkovits, T.; Search for: Huber, D.; Search for: Lehmann, H.; Search for: Southworth, J.; Search for: Bedding, T. R.; Search for: Balam, D.1; Search for: Hartmann, M.; Search for: Hrudkova, M.; Search for: Ireland, M. J.; Search for: Kovács, J.; Search for: Mezö, Gy.; Search for: Moór, A.; Search for: Niemczura, E.; Search for: Sarty, G. E.; Search for: Szabó, Gy. M.; Search for: Szabó, R.; Search for: Telting, J. H.; Search for: Tkachenko, A.; Search for: Uytterhoeven, K.; Search for: Benkö, J. M.; Search for: Bryson, S. T.; Search for: Maestro, V.; Search for: Simon, A. E.; Search for: Stello, D.; Search for: Schaefer, G.; Search for: Aerts, C.; Search for: ten Brummelaar, T. A.; Search for: De Cat, P.; Search for: McAlister, H. A.; Search for: MacEroni, C.; Search for: Mérand, A.; Search for: Still, M.; Search for: Sturmann, J.; Search for: Sturmann, L.; Search for: Turner, N.; Search for: Tuthill, P. G.; Search for: Christensen-Dalsgaard, J.; Search for: Gilliland, R. L.; Search for: Kjeldsen, H.; Search for: Quintana, E. V.; Search for: Tenenbaum, P.; Search for: Twicken, J. D. |
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| Affiliation | - National Research Council of Canada. NRC Herzberg Institute of Astrophysics
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| Format | Text, Article |
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| Subject | hierarchical system; interferometry; oscillation; photometer; spectroscopy; tidal cycle; friction; hierarchical triple system; motion; photometry; red giant star; theoretical model; tidal power; velocity |
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| Abstract | Hierarchical triple systems comprise a close binary and a more distant component. They are important for testing theories of star formation and of stellar evolution in the presence of nearby companions. We obtained 218 days of Kepler photometry of HD 181068 (magnitude of 7.1), supplemented by ground-based spectroscopy and interferometry, which show it to be a hierarchical triple with two types of mutual eclipses. The primary is a red giant that is in a 45-day orbit with a pair of red dwarfs in a close 0.9-day orbit. The red giant shows evidence for tidally induced oscillations that are driven by the orbital motion of the close pair. HD 181068 is an ideal target for studies of dynamical evolution and testing tidal friction theories in hierarchical triple systems. Copyright 2011 by the American Association for the Advancement of Science; all rights reserved. |
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| Publication date | 2011-03-03 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21271963 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | e8217bce-488a-41a0-b765-a2d6db4473c7 |
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| Record created | 2014-05-14 |
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| Record modified | 2020-04-21 |
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