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10 papers · 2 filters
The Anglo-Australian Planet Search XXV: A Candidate Massive Saturn Analog Orbiting HD 30177
Robert A. Wittenmyer, Jonathan Horner, M. W. Mengel +8
We report the discovery of a second long-period giant planet orbiting HD 30177, a star previously known to host a massive Jupiter analog (HD 30177b: a=3.80.1 au, m sin $i=9.7\…
ACCESS I: An Optical Transmission Spectrum of GJ 1214b Reveals a Heterogeneous Stellar Photosphere
Benjamin Rackham, Néstor Espinoza, Dániel Apai +8
GJ 1214b is the most studied sub-Neptune exoplanet to date. Recent measurements have shown its near-infrared transmission spectrum to be flat, pointing to a high-altitude opacity s…
A New M Dwarf Debris Disk Candidate in a Young Moving Group Discovered with Disk Detective
Steven M. Silverberg, Marc J. Kuchner, John P. Wisniewski +15
We used the Disk Detective citizen science project and the BANYAN II Bayesian analysis tool to identify a new candidate member of a nearby young association with infrared excess. W…
The Magellan PFS Planet Search Program: Radial Velocity and Stellar Abundance Analyses of the 360 AU, Metal-Poor Binary "Twins" HD 133131A & B
Johanna K. Teske, Stephen A. Shectman, Steve S. Vogt +5
We present a new precision radial velocity (RV) dataset that reveals multiple planets orbiting the stars in the 360 AU, G2G2 "twin" binary HD 133131AB. Our 6 years of high…
MASSIVE: A Bayesian analysis of giant planet populations around low-mass stars
J. Lannier, P. Delorme, A. M. Lagrange +9
Direct imaging has led to the discovery of several giant planet and brown dwarf companions. These imaged companions populate a mass, separation and age domain (mass>1MJup, orbits>5…
Apocenter glow in eccentric debris disks: implications for Fomalhaut and epsilon Eridani
Margaret Pan, Erika R. Nesvold, Marc J. Kuchner
Debris disks often take the form of eccentric rings with azimuthal asymmetries in surface brightness. Such disks are often described as showing "pericenter glow", an enhancement of…