EChO - Exoplanet Characterisation Observatory

  title={EChO - Exoplanet Characterisation Observatory},
  author={Giovanna Tinetti and Jean Philippe Beaulieu and Th. Henning and Michael E. Meyer and Giusi Micela and Ignasi Ribas and Daphne M. Stam and Mark G. Swain and Oliver Krause and Marc Ollivier and Emanuele Pace and Bruce M. Swinyard and Alan D. Aylward and Roy van Boekel and Angioletta Coradini and Thérèse Encrenaz and Ignas A. G. Snellen and Maria Rosa Zapatero-Osorio and Jeroen Bouwman and J. Y. K. Cho and Vincent Coud'e du Foresto and Tristan Guillot and Mercedes L{\'o}pez-Morales and I. C. F. Mueller-Wodarg and Enric Pall{\'e} and Frank Selsis and Alessandro Sozzetti and Peter A. R. Ade and Nicholas Achilleos and Alberto Adriani and Craig Bruce Agnor and Cristina Afonso and Carlos Allende Prieto and G{\'a}sp{\'a}r {\'A}. Bakos and Robert J. Barber and Michael J. Barlow and Peter F. Bernath and Bruno B{\'e}zard and P. Bord'e and Linda R. Brown and Arnaud Cassan and C{\'e}line Cavarroc and Angela Ciaravella and Charles Cockell and Athena Coustenis and Camilla Danielski and Leen Decin and Remco J. de Kok and Olivier D. S. Demangeon and Pieter D. Deroo and Peter Doel and Pierre Drossart and Leigh N. Fletcher and Mauro Focardi and Françcois Forget and Stephen J. Fossey and Pascal Fouqu'e and James Frith and Marina Galand and Patrick Gaulme and J. I. Gonz'alez Hern'andez and Olivier Grasset and Davide Grassi and John Lee Grenfell and Matthew Joseph Griffin and Caitlin Ann Griffith and Ulrich Grozinger and Manuel Guedel and Patrick Guio and Olivier R. Hainaut and Robert J. Hargreaves and Peter Hauschildt and Kevin Heng and David Heyrovsk{\'y} and Ricardo Hueso and Patrick J. G. Irwin and Lisa Kaltenegger and P. Kervella and David M. Kipping and Tommi T. Koskinen and G'abor Kov'acs and Antonino La Barbera and Helmut Lammer and Emmanuel Lellouch and Giuseppe Leto and Mercedes Lopez Morales and Miguel A. Lopez Valverde and Manuel L{\'o}pez‐Puertas and C. Maggio and Jean Pierre Maillard and Jesus Maldonado Prado and Jean Baptiste Marquette and F. Javier Mart{\'i}n‐Torres and Pierre F. L. Maxted and S. Miller and Sergio Molinari and David Montes and Amaya Moro-Martin and Julianne I. Moses and Olivier Mousis and Napol{\'e}on Nguyen Tuong and R. P. Nelson and Glenn S. Orton and {\'E}ric Pantin and Enzo Pascale and Stefano Pezzuto and David J. Pinfield and Ennio Poretti and Raman K. Prinja and L. Prisinzano and J. M. Rees and Ansgar Reiners and Benjamin Samuel and Agust{\'i}n S{\'a}nchez‐Lavega and Jorge Sanz Forcada and Dimitar D. Sasselov and Giorgio Savini and Bruno Sicardy and A. W. Smith and Lars P. Stixrude and Giovanni Strazzulla and Jonathan Tennyson and M. Tessenyi and Gautam Vasisht and Sandrine Vinatier and Serena Viti and Ingo P. Waldmann and Glenn J. White and Thomas Widemann and Robin D. Wordsworth and Roger V. Yelle and Yuk L. Yung and Sergey N. Yurchenko},
  journal={Experimental Astronomy},
A dedicated mission to investigate exoplanetary atmospheres represents a major milestone in our quest to understand our place in the universe by placing our Solar System in context and by addressing the suitability of planets for the presence of life. EChO -the Exoplanet Characterisation Observatory- is a mission concept specifically geared for this purpose. EChO will provide simultaneous, multi-wavelength spectroscopic observations on a stable platform that will allow very long exposures. EChO… 

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A ground-based measurement of the transmission spectrum of GJ 1214b between wavelengths of 780 and 1,000 nm is reported, finding the lack of features in this spectrum rules out cloud-free atmospheres composed primarily of hydrogen.

Infrared Transmission Spectra for Extrasolar Giant Planets

Among the hot Jupiters known to date that transit their parent stars, the two best candidates to be observed with transmission spectroscopy in the mid-infrared (MIR) are HD 189733b and HD 209458b,

Sodium Absorption from the Exoplanetary Atmosphere of HD 189733b Detected in the Optical Transmission Spectrum

We present the first ground-based detection of sodium absorption in the transmission spectrum of an extrasolar planet. Absorption due to the atmosphere of the extrasolar planet HD 189733b is detected

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