A sub-Mercury-sized exoplanet

@article{Barclay2013ASE,
  title={A sub-Mercury-sized exoplanet},
  author={Thomas Barclay and Jason F. Rowe and Jack J. Lissauer and Daniel Huber and François Fressin and Steve B. Howell and Stephen T. Bryson and William J. Chaplin and Jean-Michel D{\'e}sert and Eric D. Lopez and Geoffrey W. Marcy and Fergal Robert Mullally and Darin Ragozzine and Guillermo Torres and Elisabeth R. Adams and Eric Agol and David Barrado and Sarbani Basu and Timothy R. Bedding and Lars A. Buchhave and David Charbonneau and Jessie L. Christiansen and J{\o}rgen Christensen-Dalsgaard and David R. Ciardi and William D. Cochran and Andrea K. Dupree and Yvonne P. Elsworth and Mark Everett and Debra A. Fischer and Eric B. Ford and Jonathan J. Fortney and John Charles Geary and Michael R. Haas and Rasmus Handberg and Saskia Hekker and Christopher E. Henze and Elliott P. Horch and Andrew W. Howard and Roger C. Hunter and Howard T. Isaacson and Jon M. Jenkins and Christoffer Karoff and Steven D. Kawaler and Hans Kjeldsen and Todd C. Klaus and David W. Latham and Jie Li and Jorge Lillo-Box and Mikkel N. Lund and Mia S Lundkvist and Travis S. Metcalfe and Andrea Miglio and Robert L. Morris and Elisa V. Quintana and Dennis Stello and Jeffrey C. Smith and Martin D. Still and Susan E. Thompson},
  journal={Nature},
  year={2013},
  volume={494},
  pages={452-454}
}
Since the discovery of the first exoplanets, it has been known that other planetary systems can look quite unlike our own. Until fairly recently, we have been able to probe only the upper range of the planet size distribution, and, since last year, to detect planets that are the size of Earth or somewhat smaller. Hitherto, no planets have been found that are smaller than those we see in the Solar System. Here we report a planet significantly smaller than Mercury. This tiny planet is the… 

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References

SHOWING 1-10 OF 66 REFERENCES

Two Earth-sized planets orbiting Kepler-20

A statistical method is applied to show that the likelihood of the planetary interpretation of the transit signals is more than three orders of magnitude larger than that of the alternative hypothesis that the signals result from an eclipsing binary star.

An abundance of small exoplanets around stars with a wide range of metallicities

Spectroscopic metallicities of the host stars of 226 small exoplanet candidates discovered by NASA's Kepler mission are reported, finding that planets with radii less than four Earth radii form around host stars with a wide range of metallicities (but on average a metallicity close to that of the Sun), whereas large planets preferentially form around stars with higher metallicities.

Kepler Planet-Detection Mission: Introduction and First Results

The planetary findings derived from the first six weeks of observations with the Kepler mission are summarized, which include the detection of five new exoplanets, which confirm the existence of planets with densities substantially lower than those predicted for gas giant planets.

SEARCH FOR CARBON MONOXIDE IN THE ATMOSPHERE OF THE TRANSITING EXOPLANET HD 189733b

Water, methane, and carbon monoxide are expected to be among the most abundant molecules besides molecular hydrogen in the hot atmosphere of close-in extrasolar giant planets. Atmospheric models for

PLANET OCCURRENCE WITHIN 0.25 AU OF SOLAR-TYPE STARS FROM KEPLER

We report the distribution of planets as a function of planet radius, orbital period, and stellar effective temperature for orbital periods less than 50 days around solar-type (GK) stars. These

Atmospheric escape from hot Jupiters

The extra-solar planet HD209458b has been found to have an extended atmosphere of escaping atomic hydrogen (Vidal-Madjar et al. 2003), suggesting that "hot Jupiters" closer to their parent stars

KEPLER-10 c: A 2.2 EARTH RADIUS TRANSITING PLANET IN A MULTIPLE SYSTEM

The Kepler mission has recently announced the discovery of Kepler-10 b, the smallest exoplanet discovered to date and the first rocky planet found by the spacecraft. A second, 45 day period

Terrestrial planet formation

Defining the role of turbulence in the early nebula is a key to understanding the growth of solids larger than meter size and the initiation of runaway growth of embryos from planetesimals ultimately leads to the Growth of large terrestrial planets via large impacts.

Detection of Thermal Emission from an Extrasolar Planet

We present Spitzer Space Telescope infrared photometric time series of the transiting extrasolar planet system TrES-1. The data span a predicted time of secondary eclipse, corresponding to the

The Use of Transit Timing to Detect Terrestrial-Mass Extrasolar Planets

This work shows that timing measurements between successive transits will allow for the detection of additional planets in the system (not necessarily transiting) by their gravitational interaction with the transiting planet.
...