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Spin – Orbit Alignment for the Circumbinary Planet Host Kepler-16 A
| Content Provider | Semantic Scholar |
|---|---|
| Author | Winn, Joshua N. Albrecht, Simon Johnson, J. A. Torres, Guillermo Cochran, William D. Marcy, Geoffrey W. Howard, Andrew W. Isaacson, Howard Fischer, Debra A. Doyle, Laurance R. Welsh, William F. Carter, Joshua Adam Fabrycky, Daniel C. Ragozzine, Darin Quinn, Samuel N. Shporer, Avi Howell, Steve B. Latham, David Orosz, Jerome A. Prša, Andrej Slawson, Robert W. Borucki, William J. Koch, David G. Barclay, T. Boss, Alan P. Christensen-Dalsgaard, Jørgen Girouard, Forrest R. Jenkins, Jon M. Klaus, Todd C. Meibom, Søren Morris, Robert L. Sasselov, Dimitar D. Still, Martin D. Cleve, Jeffrey E. Van |
| Copyright Year | 2011 |
| Abstract | Kepler-16 is an eccentric low-mass eclipsing binary with a circumbinary transiting planet. Here, we investigate the angular momentum of the primary star, based on Kepler photometry and Keck spectroscopy. The primary star’s rotation period is 35.1 ± 1.0 days, and its projected obliquity with respect to the stellar binary orbit is 1. ◦6 ± 2. ◦4. Therefore, the three largest sources of angular momentum—the stellar orbit, the planetary orbit, and the primary’s rotation—are all closely aligned. This finding supports a formation scenario involving accretion from a single disk. Alternatively, tides may have realigned the stars despite their relatively wide separation (0.2 AU), a hypothesis that is supported by the agreement between the measured rotation period and the “pseudosynchronous” period of tidal evolution theory. The rotation period, chromospheric activity level, and fractional light variations suggest a main-sequence age of 2–4 Gyr. Evolutionary models of low-mass stars can match the observed masses and radii of the primary and secondary stars to within about 3%. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://authors.library.caltech.edu/28346/1/Winn2011p16404Astrophys_J_Lett.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | ABRA gene Alignment AngularJS GUCY2C protein, human Gold Kepler Photometry Planetary scanner Projections and Predictions Stars, Celestial Stellar (payment network) |
| Content Type | Text |
| Resource Type | Article |
