Variability in the super-Earth 55 Cnc e

  title={Variability in the super-Earth 55 Cnc e},
  author={B-O. Demory and Micha{\"e}l Gillon and Nikku Madhusudhan and Didier Queloz},
  journal={Monthly Notices of the Royal Astronomical Society},
Considerable progress has been made in recent years in observations of atmospheric signatures of giant exoplanets, but processes in rocky exoplanets remain largely unknown due to major challenges in observing small planets. Numerous efforts to observe spectra of superEarths, exoplanets with masses of 1-10 Earth masses, have thus far revealed only featureless spectra. In this paper we report a 4-σ detection of variability in the dayside thermal emission from the transiting super-Earth 55 Cancri… 
A map of the large day–night temperature gradient of a super-Earth exoplanet
A longitudinal thermal brightness map of the nearby transiting super-Earth 55 Cancri e is reported revealing highly asymmetric dayside thermal emission and a strong day–night temperature contrast, consistent with either an optically thick atmosphere with heat recirculation confined to the planetary dayside, or a planet devoid of atmosphere with low-viscosity magma flows at the surface.
High-energy environment of super-Earth 55 Cancri e
The high-energy X-ray to ultraviolet (XUV) irradiation of close-in planets by their host star influences their evolution and might be responsible for the existence of a population of ultra-short
Circumstellar environment of 55 Cancri
Context. 55 Cancri hosts five known exoplanets, most notably the hot super-Earth 55 Cnc e, which is one of the hottest known transiting super-Earths. Aims. Due to the short orbital separation and
High-energy environment of super-Earth 55 Cnc e I: Far-UV chromospheric variability as a possible tracer of planet-induced coronal rain
The irradiation of close-in planets by their star influences their evolution and might be responsible for a population of ultra-short period planets eroded to their bare core. In orbit around a
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Trends in Atmospheric Properties of Neptune-Size Exoplanets
Precise atmospheric observations have been made for a growing sample of warm Neptunes. Here we investigate the correlations between these observations and a large number of system parameters to show
A Case for an Atmosphere on Super-Earth 55 Cancri e
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Impact of space weather on climate and habitability of terrestrial-type exoplanets
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A Search for Water in a Super-Earth Atmosphere: High-resolution Optical Spectroscopy of 55Cancri e
We present the analysis of high-resolution optical spectra of four transits of 55Cnc e, a low-density, super-Earth that orbits a nearby Sun-like star in under 18 hours. The inferred bulk density of
A new class of Super-Earths formed from high-temperature condensates: HD219134 b, 55 Cnc e, WASP-47 e
We hypothesize that differences in the temperatures at which the rocky material condensed out of the nebula gas can lead to differences in the composition of key rocky species (e.g. Fe, Mg, Si, Ca,


Clouds in the atmosphere of the super-Earth exoplanet GJ 1214b
A measurement of the transmission spectrum of GJ 1214b at near-infrared wavelengths is reported, sufficiently precise to detect absorption features from a high mean-molecular-mass atmosphere and rule out cloud-free atmospheric models with compositions dominated by water, methane, carbon monoxide, nitrogen or carbon dioxide.
Atmospheres of Hot Super-Earths
Hot super-Earths likely possess minimal atmospheres established through vapor saturation equilibrium with the ground. We solve the hydrodynamics of these tenuous atmospheres at the surface of
Detection of a transit of the super-Earth 55 Cancri e with warm Spitzer
We report on the detection of a transit of the super-Earth 55 Cnc e with warm Spitzer in IRAC’s 4.5 μm band. Our MCMC analysis includes an extensive modeling of the systematic effects affecting warm
Optimal measures for characterizing water-rich super-Earths
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Detection of Thermal Emission from an Extrasolar Planet
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Hubble Space Telescope Near-IR Transmission Spectroscopy of the Super-Earth HD 97658b
Recent results from the Kepler mission indicate that super-Earths (planets with masses between 1 10 times that of the Earth) are the most common kind of planet around nearby Sun-like stars. These
Detection of thermal emission from a super-earth
We report on the detection of infrared light from the super-Earth 55 Cnc e, based on four occultations obtained with Warm Spitzer at 4.5 μm. Our data analysis consists of a two-part process. In a
We present photometry of the giant extrasolar planet WASP-4b at 3.6 and 4.5 μm taken with the Infrared Array Camera on board the Spitzer Space Telescope as part of Spitzer's extended warm mission. We
Catastrophic evaporation of rocky planets
Short-period exoplanets can have dayside surface temperatures surpassing 2000 K, hot enough to vaporize rock and drive a thermal wind. Small enough planets evaporate completely. We construct a
Evidence for the disintegration of KIC 12557548 b
Context. The Kepler object KIC 12557548 b is peculiar. It exhibits transit-like features every 15.7 h that vary in depth between 0.2% and 1.2%. Rappaport et al. (2012, ApJ, 752, 1) explain the