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19912026
Showing 2016 · astro-ph.EPShow all

51 papers · 2 filters

astro-ph.EP2016★ 31 cited

Mass Constraints of the WASP-47 Planetary System from Radial Velocities

Evan Sinukoff, Andrew W. Howard, Erik A. Petigura +19

We report precise radial velocity (RV) measurements of WASP-47, a G star that hosts three transiting planets in close proximity (a hot Jupiter, a super-Earth and a Neptune-sized pl…

astro-ph.EP2016★ 43 cited

Mass and Eccentricity Constraints in the WASP-47 Planetary System from a Simultaneous Analysis of Radial Velocities & Transit Timing Variations

Lauren M. Weiss, Katherine Deck, Evan Sinukoff +9

Measuring precise planet masses, densities, and orbital dynamics in individual planetary systems is an important pathway toward understanding planet formation. The WASP-47 system h…

astro-ph.EP2016★ 45 cited

Atmospheric Retrieval for Direct Imaging Spectroscopy of Gas Giants In Reflected Light II: Orbital Phase and Planetary Radius

Michael Nayak, Roxana Lupu, Mark Marley +3

Future space-based telescopes, such as the Wide-Field Infrared Survey Telescope (WFIRST), will observe the reflected-light spectra of directly imaged extrasolar planets. Interpreta…

astro-ph.EP2016★ 165 cited

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…

astro-ph.EP2016★ 46 cited

Near-Infrared Emission Spectrum of WASP-103b using Hubble Space Telescope/Wide Field Camera 3

Kimberly M. S. Cartier, Thomas G. Beatty, Ming Zhao +8

We present here our observations and analysis of the dayside emission spectrum of the hot Jupiter WASP-103b. We observed WASP-103b during secondary eclipse using two visits of the…

astro-ph.EP2016★ 111 cited

Metal enrichment leads to low atmospheric C/O ratios in transiting giant exoplanets

Néstor Espinoza, Jonathan Fortney, Yamila Miguel +2

We predict the carbon-to-oxygen (C/O) ratios in the hydrogen-helium envelope and atmospheres of a sample of nearly 50 relatively cool ( 1000 K) transiting gas gian…

astro-ph.EP2016★ 29 cited

Planetesimal clearing and size-dependent asteroid retention by secular resonance sweeping during the depletion of the solar nebula

Xiaochen Zheng, Douglas N. C. Lin, M. B. N. Kouwenhoven

The distribution of heavy elements is anomalously low in the asteroid main belt region compared with elsewhere in the solar system. Observational surveys also indicate a deficit in…

astro-ph.EP2016★ 152 cited

Forward and Inverse Modeling of the Emission and Transmission Spectrum of GJ 436b: Investigating Metal Enrichment, Tidal Heating, and Clouds

Caroline V. Morley, Heather Knutson, Michael Line +5

The Neptune-mass GJ 436b is one of the most-studied transiting exoplanets with repeated measurements of both its thermal emission and transmission spectra. We build on previous stu…

astro-ph.EP2016★ 119 cited

Spitzer Observations Confirm and Rescue the Habitable-Zone Super-Earth K2-18b for Future Characterization

Björn Benneke, Michael Werner, Erik Petigura +13

The recent detections of two transit events attributed to the super-Earth candidate K2-18b have provided the unprecedented prospect of spectroscopically studying a habitable-zone p…

astro-ph.EP2016★ 156 cited

High temperature condensate clouds in super-hot Jupiter atmospheres

Hannah R. Wakeford, Channon Visscher, Nikole K. Lewis +4

Deciphering the role of clouds is central to our understanding of exoplanet atmospheres, as they have a direct impact on the temperature and pressure structure, and observational p…

astro-ph.EP2016★ 116 cited

VLT FORS2 comparative transmission spectroscopy: Detection of Na in the atmosphere of WASP-39b from the ground

Nikolay Nikolov, David K. Sing, Neale P. Gibson +5

We present transmission spectroscopy of the warm Saturn-mass exoplanet WASP-39b made with the Very Large Telescope (VLT) FOcal Reducer and Spectrograph (FORS2) across the wavelengt…

astro-ph.EP2016★ 46 cited

Bayesian Evolution Models for Jupiter with Helium Rain and Double-diffusive Convection

Christopher Mankovich, Jonathan J. Fortney, Kevin L. Moore

Hydrogen and helium demix when sufficiently cool, and this bears on the evolution of all giant planets at large separations at or below roughly a Jupiter mass. We model the thermal…

astro-ph.EP2016★ 12 cited

Imaging protoplanets: observing transition disks with non-redundant masking

Steph Sallum, Josh Eisner, Laird M. Close +17

Transition disks, protoplanetary disks with inner clearings, are promising objects in which to directly image forming planets. The high contrast imaging technique of non-redundant…

astro-ph.EP2016★ 12 cited

Detection of the secondary eclipse of Qatar-1b in the Ks band

Patricia Cruz, David Barrado, Jorge Lillo-Box +4

Qatar-1b is a close-orbiting hot Jupiter ( , ) around a metal-rich K-dwarf, with orbital separation and period of 0.023 AU and 1.42 days.…

astro-ph.EP2016★ 63 cited

On the Composition of Young, Directly Imaged Giant Planets

J. I. Moses, M. S. Marley, K. Zahnle +6

The past decade has seen significant progress on the direct detection and characterization of young, self-luminous giant planets at wide orbital separations from their host stars.…

astro-ph.EP2016★ 140 cited

The Habitability of Proxima Centauri b: II: Environmental States and Observational Discriminants

Victoria S. Meadows, Giada N. Arney, Edward W. Schwieterman +11

Proxima Centauri b provides an unprecedented opportunity to understand the evolution and nature of terrestrial planets orbiting M dwarfs. Although Proxima Cen b orbits within its s…

astro-ph.EP2016★ 44 cited

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…

astro-ph.EP2016★ 45 cited

KELT-16b: A highly irradiated, ultra-short period hot Jupiter nearing tidal disruption

Thomas E. Oberst, Joseph E. Rodriguez, Knicole D. Colón +47

We announce the discovery of KELT-16b, a highly irradiated, ultra-short period hot Jupiter transiting the relatively bright () star TYC 2688-1839-1. A global analysis of…

astro-ph.EP2016★ 179 cited

Spitzer Phase Curve Constraints for WASP-43b at 3.6 and 4.5 microns

Kevin B. Stevenson, Michael R. Line, Jacob L. Bean +6

Previous measurements of heat redistribution efficiency (the ability to transport energy from a planet's highly irradiated dayside to its eternally dark nightside) show considerabl…

astro-ph.EP2016★ 214 cited

197 Candidates and 104 Validated Planets in K2's First Five Fields

Ian J. M. Crossfield, David R. Ciardi, Erik A. Petigura +41

We present 197 planet candidates discovered using data from the first year of the NASA K2 mission (Campaigns 0-4), along with the results of an intensive program of photometric ana…

astro-ph.EP2016★ 103 cited

Dynamics of Saturn's great storm of 2010-2011 from Cassini ISS and RPWS

Kunio M. Sayanagi, Ulyana A. Dyudina, Shawn P. Ewald +6

Saturn's quasi-periodic planet-encircling storms are the largest convecting outbursts in the Solar System. The last eruption was in 1990. A new eruption started in December 2010 an…

astro-ph.EP2016★ 120 cited

The Impact of Non-Uniform Thermal Structure on the Interpretation of Exoplanet Emission Spectra

Y. Katherina Feng, Michael R. Line, Jonathan J. Fortney +4

The determination of atmospheric structure and molecular abundances of planetary atmospheres via spectroscopy involves direct comparisons between models and data. While varying in…

astro-ph.EP2016★ 97 cited

Effects of Bulk Composition on The Atmospheric Dynamics on Close-in Exoplanets

Xi Zhang, Adam P. Showman

Super Earths and mini Neptunes likely have a wide range of atmospheric compositions, ranging from low-molecular mass atmospheres of H2 to higher molecular atmospheres of water, CO2…

astro-ph.EP2016★ 52 cited

A Goldilocks principle for modeling radial velocity noise

Fabo Feng, M. Tuomi, H. R. A. Jones +2

The doppler measurements of stars are diluted and distorted by stellar activity noise. Different choices of noise models and statistical methods have led to much controversy in the…