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MMT & Magellan Infrared Spectrograph
Brian McLeod, Daniel Fabricant, George Nystrom +19
The MMT and Magellan infrared spectrograph (MMIRS) is a cryogenic multiple slit spectrograph operating in the wavelength range 0.9-2.4 micron. MMIRS' refractive optics offer a 6.9…
Kepler-47: A Transiting Circumbinary Multi-Planet System
Jerome A. Orosz, William F. Welsh, Joshua A. Carter +36
We report the detection of Kepler-47, a system consisting of two planets orbiting around an eclipsing pair of stars. The inner and outer planets have radii 3.0 and 4.6 times that o…
The Neptune-Sized Circumbinary Planet Kepler-38b
Jerome A. Orosz, William F. Welsh, Joshua A. Carter +28
We discuss the discovery and characterization of the circumbinary planet Kepler-38b. The stellar binary is single-lined, with a period of 18.8 days, and consists of a moderately ev…
Alignment of the stellar spin with the orbits of a three-planet system
Roberto Sanchis-Ojeda, Daniel C. Fabrycky, Josh N. Winn +16
The Sun's equator and the planets' orbital planes are nearly aligned, which is presumably a consequence of their formation from a single spinning gaseous disk. For exoplanetary sys…
Two 'b's in the Beehive: The Discovery of the First Hot Jupiters in an Open Cluster
S. N. Quinn, R. J. White, D. W. Latham +12
We present the discovery of two giant planets orbiting stars in Praesepe (also known as the Beehive Cluster). These are the first known hot Jupiters in an open cluster and the only…
Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities
Joshua A. Carter, Eric Agol, William J. Chaplin +43
In the Solar system the planets' compositions vary with orbital distance, with rocky planets in close orbits and lower-density gas giants in wider orbits. The detection of close-in…