Discovery of a warm, dusty giant planet around HIP 65426
Gael Chauvin,Gael Chauvin,Silvano Desidera,Anne-Marie Lagrange,Arthur Vigan,Raffaele Gratton,Maud Langlois,Maud Langlois,M. Bonnefoy,Jean-Luc Beuzit,M. Feldt,David Mouillet,Michael Meyer,Michael Meyer,Anthony Cheetham,Beth Biller,Anthony Boccaletti,Valentina D'Orazi,Raphaël Galicher,Janis Hagelberg,Anne-Lise Maire,Dino Mesa,Johan Olofsson,Johan Olofsson,Matthias Samland,T. Schmidt,E. Sissa,Mariangela Bonavita,Benjamin Charnay,M. Cudel,S. Daemgen,Philippe Delorme,P. Janin-Potiron,Markus Janson,Markus Janson,Miriam Keppler,H. Le Coroller,R. Ligi,G.-D. Marleau,G.-D. Marleau,S. Messina,Paul Mollière,Christoph Mordasini,Christoph Mordasini,André Müller,S. Peretti,C. Perrot,L. Rodet,Daniel Rouan,Alice Zurlo,Alice Zurlo,Carsten Dominik,Th. Henning,Francois Menard,H. M. Schmid,Massimo Turatto,Stéphane Udry,Farrokh Vakili,Lyu Abe,Jacopo Antichi,Andrea Baruffolo,Pierre Baudoz,J. Baudrand,P. Blanchard,Andreas Bazzon,Tristan Buey,Marcel Carbillet,M. Carle,Julien Charton,Enrico Cascone,Riccardo Claudi,Anne Costille,A. Deboulbe,V. De Caprio,Kjetil Dohlen,Daniela Fantinel,P. Feautrier,Thierry Fusco,P. Gigan,Enrico Giro,D. Gisler,L. Gluck,Norbert Hubin,Emmanuel Hugot,M. Jaquet,M. Kasper,F. Madec,Yves Magnard,Patrice Martinez,D. Maurel,D. Le Mignant,O. Möller-Nilsson,M. Llored,Thibaut Moulin,Alain Origne,A. Pavlov,D. Perret,Cyril Petit,J. Pragt,Pascal Puget,P. Rabou,Joany Andreina Manjarres Ramos,R. Rigal,S. Rochat,Ronald Roelfsema,Gérard Rousset,A. Roux,Bernardo Salasnich,Jean-François Sauvage,Arnaud Sevin,Christian Soenke,Eric Stadler,M. Suarez,L. Weber,Francois Wildi,S. Antoniucci,Jean-Charles Augereau,Jean-Loup Baudino,Wolfgang Brandner,N. Engler,Julien Girard,Julien Girard,Cecile Gry,Quentin Kral,Quentin Kral,T. Kopytova,T. Kopytova,T. Kopytova,Eric Lagadec,Julien Milli,Julien Milli,C. Moutou,C. Moutou,Joshua E. Schlieder,Joshua E. Schlieder,Judit Szulágyi,C. Thalmann,Zahed Wahhaj,Zahed Wahhaj +138 more
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TLDR
In this article, the authors used the IRDIS dual-band imager and the IFS integral field spectrograph of SPHERE to acquire high-contrast coronagraphic differential near-infrared images and spectra of the young A2 star HIP.Abstract:
Aims. The SHINE program is a high-contrast near-infrared survey of 600 young, nearby stars aimed at searching for and characterizing new planetary systems using VLT/SPHERE’s unprecedented high-contrast and high-angular-resolution imaging capabilities. It is also intended to place statistical constraints on the rate, mass and orbital distributions of the giant planet population at large orbits as a function of the stellar host mass and age to test planet-formation theories.
Methods. We used the IRDIS dual-band imager and the IFS integral field spectrograph of SPHERE to acquire high-contrast coronagraphic differential near-infrared images and spectra of the young A2 star HIP 65426. It is a member of the ~17 Myr old Lower Centaurus-Crux association.
Results. At a separation of 830 mas (92 au projected) from the star, we detect a faint red companion. Multi-epoch observations confirm that it shares common proper motion with HIP 65426. Spectro-photometric measurements extracted with IFS and IRDIS between 0.95 and 2.2 μm indicate a warm, dusty atmosphere characteristic of young low-surface-gravity L5-L7 dwarfs. Hot-start evolutionary models predict a luminosity consistent with a 6–12 MJup, Teff = 1300–1600 K and R = 1.5 ± 0.1 RJup giant planet. Finally, the comparison with Exo-REM and PHOENIX BT-Settl synthetic atmosphere models gives consistent effective temperatures but with slightly higher surface gravity solutions of log (g) = 4.0–5.0 with smaller radii (1.0–1.3 RJup).
Conclusions. Given its physical and spectral properties, HIP 65426 b occupies a rather unique placement in terms of age, mass, and spectral-type among the currently known imaged planets. It represents a particularly interesting case to study the presence of clouds as a function of particle size, composition, and location in the atmosphere, to search for signatures of non-equilibrium chemistry, and finally to test the theory of planet formation and evolution.read more
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Barblan,Paul S. Barklem,David Barrado,M. Barros,M. A. Barstow,S. Bartholomé Muñoz,J.-L. Bassilana,Ugo Becciani,M. Bellazzini,A. Berihuete,Stefano Bertone,Luciana Bianchi,O. Bienaymé,S. Blanco-Cuaresma,T. Boch,C. Boeche,Alex Bombrun,R. Borrachero,Diego Bossini,S. Bouquillon,G. Bourda,Angela Bragaglia,L. Bramante,Maarten A. Breddels,Alessandro Bressan,N. Brouillet,T. Brüsemeister,E. Brugaletta,B. Bucciarelli,A. Burlacu,D. Busonero,A. G. Butkevich,R. Buzzi,Elisabetta Caffau,R. Cancelliere,G. Cannizzaro,Tristan Cantat-Gaudin,R. Carballo,T. Carlucci,J. M. Carrasco,Laia Casamiquela,Marco Castellani,Alfred Castro-Ginard,P. Charlot,L. Chemin,Andrea Chiavassa,G. Cocozza,G. Costigan,S. Cowell,F. Crifo,M. Crosta,C. Crowley,J. Cuypers,Carlos Dafonte,Yassine Damerdji,A. Dapergolas,P. David,M. David,P. de Laverny,F. De Luise,R. De March,D. de Martino,R. S. de Souza,A. de Torres,J. Debosscher,E. del Pozo,Marco Delbo,A. Delgado,H. E. Delgado,P. Di Matteo,S. Diakite,C. Diener,E. Distefano,C. Dolding,P. Drazinos,J. Durán,B. Edvardsson,H. Enke,K. Eriksson,P. Esquej,G. Eynard Bontemps,C. Fabre,M. Fabrizio,S. Faigler,A. J. Falcão,M. Farràs Casas,L. Federici,Grigori Fedorets,P. Fernique,F. Figueras,Francesco Filippi,K. Findeisen,A. Fonti,E. Fraile,Morgan Fraser,B. Frézouls,Mario Gai,S. Galleti,D. Garabato,F. García-Sedano,A. Garofalo,N. Garralda,A. Gavel,P. Gavras,J. Gerssen,R. Geyer,P. Giacobbe,Gerard Gilmore,S. Girona,G. Giuffrida,F. Glass,M. Gomes,Mikael Granvik,A. Gueguen,A. Guerrier,J. Guiraud,R. Gutiérrez-Sánchez,R. Haigron,Despina Hatzidimitriou,M. Hauser,M. Haywood,Ulrike Heiter,Amina Helmi,J. Heu,Thomas Hilger,David Hobbs,Werner Hofmann,G. Holland,H. E. Huckle,A. Hypki,V. Icardi,K. Janßen,G. Jevardat de Fombelle,Peter G. Jonker,Attila Juhasz,F. Julbe,A. Karampelas,A. Kewley,Joakim Klar,A. Kochoska,R. Kohley,K. Kolenberg,M. Kontizas,E. Kontizas,Sergey E. Koposov,Georges Kordopatis,Z. Kostrzewa-Rutkowska,P. Koubsky,Sébastien Lambert,Antonino F. Lanza,Y. Lasne,J.-B. Lavigne,Y. Le Fustec,C. Le Poncin-Lafitte,Yveline Lebreton,S. Leccia,N. Leclerc,I. Lecoeur-Taïbi,H. Lenhardt,F. Leroux,S. Liao,E. Licata,H. E. P. Lindstrøm,T. A. Lister,E. Livanou,A. Lobel,M. López,S. Managau,Robert G. Mann,G. Mantelet,O. Marchal,Jon Marchant,Marcella Marconi,S. Marinoni,G. Marschalkó,D. J. Marshall,M. Martino,Gábor Marton,Nicolas Mary,Davide Massari,G. Matijevič,Tsevi Mazeh,Paul J. McMillan,S. Messina,D. Michalik,N. R. Millar,D. Molina,R. Molinaro,L. Molnár,P. Montegriffo,R. Mor,R. Morbidelli,Thierry Morel,D. Morris,A. F. Mulone,T. Muraveva,I. Musella,Gijs Nelemans,Luciano Nicastro,L. Noval,W. O'Mullane,C. Ordénovic,D. Ordóñez-Blanco,P. Osborne,C. Pagani,I. Pagano,F. Pailler,H. Palacin,L. Palaversa,A. Panahi,Michał Pawlak,A. M. Piersimoni,F.-X. Pineau,E. Plachy,G. Plum,E. Poggio,E. Poujoulet,A. Prša,L. Pulone,E. Racero,S. Ragaini,N. Rambaux,M. Ramos-Lerate,S. Regibo,Céline Reylé,F. Riclet,V. Ripepi,A. Riva,A. Rivard,G. Rixon,T. Roegiers,M. Roelens,M. Romero-Gómez,Nicholas Rowell,F. Royer,L. Ruiz-Dern,G. Sadowski,T. Sagristà Sellés,Johannes Sahlmann,J. Salgado,E. Salguero,Nicoletta Sanna,Toni Santana-Ros,M. Sarasso,H. Savietto,M. Schultheis,Eva Sciacca,M. Segol,J. C. Segovia,Damien Ségransan,I.-C. Shih,L. Siltala,A. F. Silva,Richard L. Smart,K. W. Smith,E. Solano,F. Solitro,R. Sordo,Sonia Nieto,J. Souchay,A. Spagna,Federica Spoto,U. Stampa,Iain A. Steele,H. Steidelmüller,C. A. Stephenson,H. Stoev,F. F. Suess,Jean Surdej,Laszlo Szabados,E. Szegedi-Elek,D. Tapiador,F. Taris,G. Tauran,M. B. Taylor,Ramachrisna Teixeira,D. Terrett,P. Teyssandier,W. Thuillot,A. Titarenko,F. Torra Clotet,C. Turon,A. Ulla,E. Utrilla,S. Uzzi,M. Vaillant,G. Valentini,V. Valette,A. van Elteren,E. Van Hemelryck,M. van Leeuwen,M. Vaschetto,Alberto Vecchiato,Jovan Veljanoski,Y. Viala,D. Vicente,Steven S. Vogt,C. von Essen,H. Voss,V. Votruba,S. Voutsinas,G. Walmsley,M. Weiler,O. Wertz,T. Wevers,Łukasz Wyrzykowski,A. Yoldas,M. Žerjal,H. Ziaeepour,J. Zorec,Sven Zschocke,Shay Zucker,C. Zurbach,T. Zwitter +452 more