Tau-REx I: A next generation retrieval code for exoplanetary atmospheres
Ingo Waldmann,Giovanna Tinetti,Marco Rocchetto,Emma J. Barton,Sergei N. Yurchenko,Jonathan Tennyson +5 more
Reads0
Chats0
TLDR
TauRex (Tau Retrieval for Exoplanets) as mentioned in this paper is a line-by-line radiative transfer fully Bayesian retrieval framework for exoplanetary atmospheres.Abstract:
Spectroscopy of exoplanetary atmospheres has become a well established method for the characterisation of extrasolar planets. We here present a novel inverse retrieval code for exoplanetary atmospheres. TauRex (Tau Retrieval for Exoplanets) is a line-by-line radiative transfer fully Bayesian retrieval framework. TauRex includes the following features: 1) the optimised use of molecular line-lists from the Exomol project; 2) an unbiased atmospheric composition prior selection, through custom built pattern recognition software; 3) the use of two independent algorithms to fully sample the Bayesian likelihood space: nested sampling as well as a more classical Markov Chain Monte Carlo approach; 4) iterative Bayesian parameter and model selection using the full Bayesian Evidence as well as the Savage-Dickey Ratio for nested models, and 5) the ability to fully map very large parameter spaces through optimal code parallelisation and scalability to cluster computing. In this publication we outline the TauRex framework and demonstrate, using a theoretical hot-Jupiter transmission spectrum, the parameter retrieval and model selection. We investigate the impact of Signal-to-Noise and spectral resolution on the retrievability of individual model parameters, both in terms of error bars on the temperature and molecular mixing ratios as well as its effect on the model's global Bayesian evidence.read more
Citations
More filters
Journal ArticleDOI
Characterizing transiting exoplanet atmospheres with jwst
Thomas P. Greene,Michael R. Line,Cezar Montero,Jonathan J. Fortney,Jacob Lustig-Yaeger,Kyle Luther +5 more
TL;DR: In this article, the authors explore how well spectra from the James Webb Space Telescope (JWST) will likely constrain bulk atmospheric properties of transiting exoplanets.
Journal ArticleDOI
The ExoMol database: Molecular line lists for exoplanet and other hot atmospheres
Jonathan Tennyson,Sergei N. Yurchenko,Ahmed Al-Refaie,Emma J. Barton,Katy L. Chubb,Phillip A. Coles,S. Diamantopoulou,Maire N. Gorman,Christian Hill,Aden Lam,Lorenzo Lodi,Laura K. McKemmish,Yueqi Na,Alec Owens,Oleg L. Polyansky,Tom Rivlin,Clara Sousa-Silva,Daniel S. Underwood,Andrey Yachmenev,Emil J. Zak +19 more
TL;DR: The ExoMol database as mentioned in this paper provides extensive line lists of molecular transitions which are valid over extended temperature ranges, including lifetimes of individual states, temperature-dependent cooling functions, Lande g-factors, partition functions, cross sections, k-coefficients and transition dipoles with phase relations.
Journal ArticleDOI
The nature of the TRAPPIST-1 exoplanets
Simon L. Grimm,Brice-Olivier Demory,Michaël Gillon,Caroline Dorn,Caroline Dorn,Eric Agol,Artem Burdanov,Laetitia Delrez,Marko Sestovic,Amaury H. M. J. Triaud,Amaury H. M. J. Triaud,Martin Turbet,Emeline Bolmont,Anthony Caldas,Julien de Wit,Emmanuel Jehin,Jérémy Leconte,Sean N. Raymond,Valérie Van Grootel,Adam J. Burgasser,Sean Carey,Daniel C. Fabrycky,Kevin Heng,David M. Hernandez,James G. Ingalls,Susan M. Lederer,Franck Selsis,Didier Queloz +27 more
TL;DR: In this article, the authors used a genetic algorithm coupled with a full N-body integrator to estimate the masses and densities of the TRAPPIST-1 exoplanets.
Journal ArticleDOI
A chemical survey of exoplanets with ARIEL
Giovanna Tinetti,Pierre Drossart,Paul Eccleston,Paul Hartogh,A. Heske,Jérémy Leconte,Giuseppina Micela,Marc Ollivier,Göran Pilbratt,L. Puig,Diego Turrini,Bart Vandenbussche,Paulina Wolkenberg,Jean-Philippe Beaulieu,Lars A. Buchave,Martin Ferus,Matthew Joseph Griffin,Manuel Guedel,Kay Justtanont,Pierre Olivier Lagage,Pedro Machado,Giuseppe Malaguti,Michiel Min,Hans Ulrik Nørgaard-Nielsen,M. Rataj,Tom Ray,Ignasi Ribas,Mark R. Swain,Róbert Szabó,Stephanie C. Werner,Joanna K. Barstow,Matthew R. Burleigh,James Y-K. Cho,Vincent Coudé du Foresto,Athena Coustenis,Leen Decin,Thérèse Encrenaz,Marina Galand,Michaël Gillon,Ravit Helled,Juan Carlos Morales,Antonio García Muñoz,A. Moneti,Isabella Pagano,Enzo Pascale,Giuseppe Piccioni,D. J. Pinfield,Subhajit Sarkar,Franck Selsis,Jonathan Tennyson,Amaury H. M. J. Triaud,Olivia Venot,Ingo Waldmann,David Waltham,Gillian S. Wright,Jérôme Amiaux,Jean Louis Auguères,Michel Berthé,Naidu Bezawada,Georgia Bishop,Neil Bowles,Deirdre Coffey,Josep Colomé,Martin Crook,Pierre-Elie Crouzet,Vania Da Peppo,Isabel Escudero Sanz,Mauro Focardi,Martin Frericks,T. Hunt,R. Kohley,Kevin Middleton,Gianluca Morgante,Roland Ottensamer,Emanuele Pace,Chris Pearson,R. Stamper,Kate Symonds,Miriam Rengel,Etienne Renotte,Peter A. R. Ade,Laura Affer,Christophe Alard,Nicole F. Allard,Francesca Altieri,Y. André,C. Arena,Ioannis Argyriou,Alan D. Aylward,Cristian Baccani,Gáspár Á. Bakos,Marek Banaszkiewicz,M. J. Barlow,V. Batista,Giancarlo Bellucci,Serena Benatti,Pernelle Bernardi,Bruno Bézard,M. I. Blecka,Emeline Bolmont,Bertrand Bonfond,Rosaria Bonito,Aldo S. Bonomo,John Robert Brucato,Allan Sacha Brun,Ian Bryson,Waldemar Bujwan,Sarah L. Casewell,Bejamin Charnay,Cesare Cecchi Pestellini,Guo Chen,Angela Ciaravella,Riccardo Claudi,R. Cledassou,Mario Damasso,M. Damiano,Camilla Danielski,Pieter Deroo,Anna Maria Di Giorgio,Carsten Dominik,Vanessa Doublier,Simon Doyle,René Doyon,Benjamin Drummond,Bastien Duong,Stephen Anthony Eales,Billy Edwards,M. Farina,Ettore Flaccomio,Leigh N. Fletcher,François Forget,S. J. Fossey,Markus Fränz,Yuka Fujii,A. Garcia-Piquer,Walter Kieran Gear,Hervé Geoffray,Jean-Claude Gérard,Lluis Gesa,Haley Louise Gomez,Rafal Graczyk,Caitlin A. Griffith,Denis Grodent,M. G. Guarcello,Jacques Gustin,Keiko Hamano,Peter Charles Hargrave,Yann Hello,Kevin Heng,E. Herrero,Allan Hornstrup,Benoît Hubert,Shigeru Ida,Masahiro Ikoma,N. Iro,Patrick G. J. Irwin,Christopher Jarchow,Jean Jaubert,Hugh R. A. Jones,Queyrel Julien,Shingo Kameda,Franz Kerschbaum,Pierre Kervella,Tommi Koskinen,Matthijs Krijger,Norbert Krupp,M. Lafarga,Federico Landini,Emanuel Lellouch,Giuseppe Leto,A. Luntzer,Theresa Rank-Lüftinger,Antonio Maggio,Jesus Maldonado,Jean Pierre Maillard,Urs Mall,Jean Baptiste Marquette,Stéphane Mathis,Pierre F. L. Maxted,Taro Matsuo,Alexander S. Medvedev,Yamila Miguel,Vincent Minier,Giuseppe Morello,Alessandro Mura,Norio Narita,Valerio Nascimbeni,N. Nguyen Tong,Vladimiro Noce,Fabrizio Oliva,Enric Palle,Paul Palmer,Maurizio Pancrazzi,Andreas Papageorgiou,Vivien Parmentier,Manuel Perger,A. Petralia,Stefano Pezzuto,Raymond T. Pierrehumbert,Ignazio Pillitteri,Giampaolo Piotto,Giampaolo Pisano,Loredana Prisinzano,Aikaterini Radioti,Jean Michel Reess,Ladislav Rezac,Marco Rocchetto,A. Rosich,Nicoletta Sanna,Alexandre Santerne,Giorgio Savini,Gaetano Scandariato,Bruno Sicardy,Carles Sierra,Giuseppe Sindoni,Konrad Skup,Ignas Snellen,Mateusz Sobiecki,Lauriane Soret,Alessandro Sozzetti,Arnaud Stiepen,Antoine Strugarek,Jake Taylor,William Taylor,Luca Terenzi,Marcell Tessenyi,Angelos Tsiaras,C. Tucker,Diana Valencia,Gautam Vasisht,Allona Vazan,Francesc Vilardell,Sabrine Vinatier,Serena Viti,Rens Waters,Piotr Wawer,A. Wawrzaszek,Anthony Peter Whitworth,Yuk L. Yung,Sergey N. Yurchenko,Maria Rosa Zapatero Osorio,Robert T. Zellem,Tiziano Zingales,Frans Zwart +243 more
TL;DR: The ARIEL mission as mentioned in this paper was designed to observe a large number of transiting planets for statistical understanding, including gas giants, Neptunes, super-Earths and Earth-size planets around a range of host star types using transit spectroscopy in the 1.25-7.8 μm spectral range and multiple narrow-band photometry in the optical.
Journal ArticleDOI
Exoplanet Biosignatures: Understanding Oxygen as a Biosignature in the Context of Its Environment.
Victoria S. Meadows,Victoria S. Meadows,Christopher T. Reinhard,Christopher T. Reinhard,Giada Arney,Giada Arney,M. N. Parenteau,M. N. Parenteau,Edward W. Schwieterman,Shawn Domagal-Goldman,Shawn Domagal-Goldman,Andrew P. Lincowski,Andrew P. Lincowski,Karl R. Stapelfeldt,Heike Rauer,Shiladitya DasSarma,Siddharth Hegde,Norio Narita,Russell Deitrick,Russell Deitrick,Jacob Lustig-Yaeger,Jacob Lustig-Yaeger,Timothy W. Lyons,Timothy W. Lyons,N. Siegler,J. Lee Grenfell +25 more
TL;DR: The coevolution of life with the early Earth's environment is examined to identify how the interplay of sources and sinks may have suppressed O2 release into the atmosphere for several billion years, producing a false negative for biologically generated O2.
References
More filters
Journal ArticleDOI
A simplex method for function minimization
John A. Nelder,R. Mead +1 more
TL;DR: A method is described for the minimization of a function of n variables, which depends on the comparison of function values at the (n 41) vertices of a general simplex, followed by the replacement of the vertex with the highest value by another point.
Book
Principal Component Analysis
TL;DR: In this article, the authors present a graphical representation of data using Principal Component Analysis (PCA) for time series and other non-independent data, as well as a generalization and adaptation of principal component analysis.
Journal ArticleDOI
Monte Carlo Sampling Methods Using Markov Chains and Their Applications
TL;DR: A generalization of the sampling method introduced by Metropolis et al. as mentioned in this paper is presented along with an exposition of the relevant theory, techniques of application and methods and difficulties of assessing the error in Monte Carlo estimates.
Journal ArticleDOI
Nearest neighbor pattern classification
Thomas M. Cover,Peter E. Hart +1 more
TL;DR: The nearest neighbor decision rule assigns to an unclassified sample point the classification of the nearest of a set of previously classified points, so it may be said that half the classification information in an infinite sample set is contained in the nearest neighbor.
Journal ArticleDOI
emcee: The MCMC Hammer
TL;DR: The emcee algorithm as mentioned in this paper is a Python implementation of the affine-invariant ensemble sampler for Markov chain Monte Carlo (MCMC) proposed by Goodman & Weare (2010).