Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b
| Autor: | Jon M. Jenkins, William J. Borucki, David G. Koch, Geoffrey W. Marcy, William D. Cochran, William F. Welsh, Gibor Basri, Natalie M. Batalha, Lars A. Buchhave, Timothy M. Brown, Douglas A. Caldwell, Edward W. Dunham, Michael Endl, Debra A. Fischer, Thomas N. Gautier, John C. Geary, Ronald L. Gilliland, Steve B. Howell, Howard Isaacson, John Asher Johnson, David W. Latham, Jack J. Lissauer, David G. Monet, Jason F. Rowe, Dimitar D. Sasselov, Andrew W. Howard, Phillip MacQueen, Jerome A. Orosz, Hema Chandrasekaran, Joseph D. Twicken, Stephen T. Bryson, Elisa V. Quintana, Bruce D. Clarke, Jie Li, Christopher Allen, Peter Tenenbaum, Hayley Wu, Søren Meibom, Todd C. Klaus, Christopher K. Middour, Miles T. Cote, Sean McCauliff, Forrest R. Girouard, Jay P. Gunter, Bill Wohler, Jennifer R. Hall, Khadeejah Ibrahim, AKM Kamal Uddin, Michael S. Wu, Paresh A. Bhavsar, Jeffrey Van Cleve, David L. Pletcher, Jessie L. Dotson, Michael R. Haas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Physics
Earth and Planetary Astrophysics (astro-ph.EP) Subgiant Stellar rotation Rossiter–McLaughlin effect FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Orbital period Exoplanet Orbit Space and Planetary Science Planet Hot Jupiter Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics - Earth and Planetary Astrophysics |
| Popis: | We report the discovery and the Rossiter-McLaughlin effect of Kepler-8b, a transiting planet identified by the NASA Kepler Mission. Kepler photometry and Keck-HIRES radial velocities yield the radius and mass of the planet around this F8IV subgiant host star. The planet has a radius RP = 1.419 RJ and a mass, MP = 0.60 MJ, yielding a density of 0.26 g cm^-3, among the lowest density planets known. The orbital period is P = 3.523 days and orbital semima jor axis is 0.0483+0.0006/-0.0012 AU. The star has a large rotational v sin i of 10.5 +/- 0.7 km s^-1 and is relatively faint (V = 13.89 mag), both properties deleterious to precise Doppler measurements. The velocities are indeed noisy, with scatter of 30 m s^-1, but exhibit a period and phase consistent with the planet implied by the photometry. We securely detect the Rossiter-McLaughlin effect, confirming the planet's existence and establishing its orbit as prograde. We measure an inclination between the projected planetary orbital axis and the projected stellar rotation axis of lambda = -26.9 +/- 4.6 deg, indicating a moderate inclination of the planetary orbit. Rossiter-McLaughlin measurements of a large sample of transiting planets from Kepler will provide a statistically robust measure of the true distribution of spin-orbit orientations for hot jupiters in general. 26 pages, 8 figures, 2 tables; In preparation for submission to the Astrophysical Journal |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|