Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b
Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b
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.
Howard Isaacson、David L. Pletcher、Todd C. Klaus、Jon M. Jenkins、William J. Borucki、Miles T. Cote、Thomas N. Gautier III、William F. Welsh、Christopher K. Middour、Jennifer R. Hall、Elisa V. Quintana、Debra A. Fischer、Douglas A. Caldwell、Hayley Wu、Forrest R. Girouard、Jeffrey Van Cleve、Bill Wohler、Stephen T. Bryson、AKM Kamal Uddin、Peter Tenenbaum、Jessie A. Dotson、Bruce D. Clarke、Jack J. Lissauer、Hema Chandrasekaran、Geoffrey W. Marcy、Gibor Basri、Dimitar D. Sasselov、Michael R. Haas、Soren Meibom、Joseph D. Twicken、Edward W. Dunham、Khadeejah Ibrahim、John Asher Johnson、David G. Monet、John C. Geary、Ronald L. Gilliland、Lars A. Buchhave、Jay P. Gunter、Christopher Allen、Andrew W. Howard、Michael Endl、Michael S. Wu、William D. Cochran、Jie Li、Paresh A. Bhavsar、Steve B. Howell、David G. Koch、Phillip MacQueen、David W. Latham、Tim M. Brown、Natalie M. Batalha、Jason F. Rowe、Sean McCauliff
天文学
Howard Isaacson,David L. Pletcher,Todd C. Klaus,Jon M. Jenkins,William J. Borucki,Miles T. Cote,Thomas N. Gautier III,William F. Welsh,Christopher K. Middour,Jennifer R. Hall,Elisa V. Quintana,Debra A. Fischer,Douglas A. Caldwell,Hayley Wu,Forrest R. Girouard,Jeffrey Van Cleve,Bill Wohler,Stephen T. Bryson,AKM Kamal Uddin,Peter Tenenbaum,Jessie A. Dotson,Bruce D. Clarke,Jack J. Lissauer,Hema Chandrasekaran,Geoffrey W. Marcy,Gibor Basri,Dimitar D. Sasselov,Michael R. Haas,Soren Meibom,Joseph D. Twicken,Edward W. Dunham,Khadeejah Ibrahim,John Asher Johnson,David G. Monet,John C. Geary,Ronald L. Gilliland,Lars A. Buchhave,Jay P. Gunter,Christopher Allen,Andrew W. Howard,Michael Endl,Michael S. Wu,William D. Cochran,Jie Li,Paresh A. Bhavsar,Steve B. Howell,David G. Koch,Phillip MacQueen,David W. Latham,Tim M. Brown,Natalie M. Batalha,Jason F. Rowe,Sean McCauliff.Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b[EB/OL].(2010-01-04)[2025-07-16].https://arxiv.org/abs/1001.0416.点此复制
评论