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Your search keyword '"Sturmann, J."' showing total 2 results
Start Over Author "Sturmann, J." Publisher american association for the advancement of science
2 results on '"Sturmann, J."'

1. Imaging the surface of Altair

Author

Monnier, John D., Zhao, M., Pedretti, E., Thureau, N., Ireland, M., Muirhead, P., Berger, J.-P., Millan-Gabet, R., Van Belle, G., ten Brummelaar, T., McAlister, H., Ridgway, S., Turner, N., Sturmann, L., Sturmann, J, and Berger, D.

Subjects
Gravity anomalies -- Observations, Stars -- Observations, Stellar evolution -- Observations, Very long baseline interferometry -- Usage
Published
2007

2. HD 181068: a red giant in a triply eclipsing compact hierarchical triple system.

Author

Derekas A, Kiss LL, Borkovits T, Huber D, Lehmann H, Southworth J, Bedding TR, Balam D, Hartmann M, Hrudkova M, Ireland MJ, Kovács J, Mezo G, Moór A, Niemczura E, Sarty GE, Szabó GM, Szabó R, Telting JH, Tkachenko A, Uytterhoeven K, Benko JM, Bryson ST, Maestro V, Simon AE, Stello D, Schaefer G, Aerts C, ten Brummelaar TA, De Cat P, McAlister HA, Maceroni C, Mérand A, Still M, Sturmann J, Sturmann L, Turner N, Tuthill PG, Christensen-Dalsgaard J, Gilliland RL, Kjeldsen H, Quintana EV, Tenenbaum P, and Twicken JD

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.

Published
2011
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