Journal ArticleDOI
Evidence for an additional planet in the β Pictoris system
Anne-Marie Lagrange,N. Meunier,Pascal Rubini,Miriam Keppler,Miriam Keppler,F. Galland,E. Chapellier,Eric Michel,Luis Balona,Hervé Beust,Tristan Guillot,Antoine Grandjean,S. Borgniet,Djamel Mékarnia,Paul Wilson,Paul Wilson,Paul Wilson,Flavien Kiefer,Mickael Bonnefoy,J. Lillo-Box,B. Pantoja,B. Pantoja,Matias I. Jones,D. Iglesias,L. Rodet,Matias Diaz,A. Zapata,Lyu Abe,François-Xavier Schmider +28 more
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TLDR
In this article, the authors study ten years of European Southern Observatory/High Accuracy Radial Velocity Planet Searcher (HARPS) high-resolution spectroscopic data of β Pictoris.Abstract:
With its imaged debris disk of dust, its evaporating exocomets, and an imaged giant planet, the young (~23 Myr) β Pictoris system is a unique proxy for detailed studies of planet formation processes as well as planet–disk interactions. Here, we study ten years of European Southern Observatory/High Accuracy Radial Velocity Planet Searcher (HARPS) high-resolution spectroscopic data of β Pictoris. After removing the radial velocity (RV) signals arising from the δ Scuti pulsations of the star, a ~1,200-d periodic signal remains, which, within our current knowledge, we can only attribute to a second planet in the system. The β Pic c mass is about nine times the mass of Jupiter; it orbits at ~2.7 au on an eccentric (e ~ 0.24) orbit. More RV data are needed to obtain more precise estimates of the properties of β Pic c. The current modelling of the planet’s properties and the dynamic of the whole system has to be reinvestigated in light of this detection. Radial velocity data of the young β Pictoris system acquired by HARPS and spanning 15 years show evidence of β Pic c, a gas giant of ~9 Jupiter masses orbiting on an eccentric orbit at ~2.4 au from the star, near the theoretical snowline. Both β Pic b and c, located close to the star, may have formed in situ by core accretion.read more
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The HARPS-TERRA project I. Description of the algorithms, performance and new measurements on a few remarkable stars observed by HARPS
TL;DR: In this paper, the authors proposed an algorithm to obtain precision RV measurements using least-squares matching of each observed spectrum to a high signal-to-noise ratio template derived from the same observations.
Journal ArticleDOI
Population-level Eccentricity Distributions of Imaged Exoplanets and Brown Dwarf Companions: Dynamical Evidence for Distinct Formation Channels
TL;DR: In this article, the authors combine high-contrast imaging observations of substellar companions obtained primarily with Keck/NIRC2 together with astrometry from the literature to test for differences in the population level eccentricity distributions of 27 long-period giant planets and brown dwarf companions between 5 and 100 au using hierarchical Bayesian modeling.
Journal ArticleDOI
Peering into the formation history of beta Pictoris b with VLTI/GRAVITY long baseline interferometry
M. Nowak,Sylvestre Lacour,Paul Mollière,Jingxiu Wang,Benjamin Charnay,E. F. van Dishoeck,R. Abuter,António Amorim,J. P. Berger,H. Beust,M. Bonnefoy,H. Bonnet,Wolfgang Brandner,A. Buron,Faustine Cantalloube,C. Collin,F. Chapron,Y. Clénet,V. Coudé du Foresto,P. T. de Zeeuw,Roderick Dembet,Jason Dexter,Gilles Duvert,Andreas Eckart,Frank Eisenhauer,N. M. Förster Schreiber,P. Fédou,R. J. García López,Feng Gao,Eric Gendron,Reinhard Genzel,Stefan Gillessen,F. Haußmann,Th. Henning,Stefan Hippler,Z. Hubert,Laurent Jocou,Pierre Kervella,Anne-Marie Lagrange,Vincent Lapeyrere,J.-B. Le Bouquin,Pierre Léna,Anne-Lise Maire,T. Ott,T. Paumard,Claudia Paladini,K. Perraut,Guy Perrin,Laurent Pueyo,O. Pfuhl,Sebastian Rabien,C. Rau,G. Rodríguez-Coira,G. Rousset,Silvia Scheithauer,Jinyi Shangguan,Odele Straub,Christian Straubmeier,Eckhard Sturm,Linda J. Tacconi,F. H. Vincent,Felix Widmann,Ekkehard Wieprecht,Erich Wiezorrek,Julien Woillez,Senol Yazici,D. Ziegler +66 more
TL;DR: In this article, the authors used the GRAVITY instrument with the four 8.2 m telescopes of the Very Large Telescope Interferometer to obtain K-band spectro-interferometric data on beta Pictoris b and obtained an estimate of the dynamical mass of the planet and its orbital parameters using high-precision astrometry.
Journal ArticleDOI
Peering into the formation history of β Pictoris b with VLTI/GRAVITY long-baseline interferometry
M. Nowak,M. Nowak,Sylvestre Lacour,Sylvestre Lacour,Sylvestre Lacour,P. Mollière,P. Mollière,Jingxiu Wang,Benjamin Charnay,E. F. van Dishoeck,E. F. van Dishoeck,Roberto Abuter,António Amorim,Jean-Phillipe Berger,Hervé Beust,Mickael Bonnefoy,H. Bonnet,Wolfgang Brandner,A. Buron,Faustine Cantalloube,C. Collin,F. Chapron,Yann Clénet,V. Coudé du Foresto,P. T. de Zeeuw,P. T. de Zeeuw,R. Dembet,Jason Dexter,Gilles Duvert,Andreas Eckart,Andreas Eckart,Frank Eisenhauer,N. M. Förster Schreiber,P. Fédou,R. Garcia Lopez,R. Garcia Lopez,Feng Gao,Eric Gendron,Reinhard Genzel,Reinhard Genzel,Stefan Gillessen,F. Haußmann,Th. Henning,Stefan Hippler,Z. Hubert,Laurent Jocou,Pierre Kervella,Anne-Marie Lagrange,V. Lapeyrère,J.-B. Le Bouquin,Pierre Léna,Anne-Lise Maire,Anne-Lise Maire,Thomas Ott,Thibaut Paumard,Claudia Paladini,Karine Perraut,Guy Perrin,Laurent Pueyo,Oliver Pfuhl,Oliver Pfuhl,Sebastian Rabien,C. Rau,G. Rodríguez-Coira,Gérard Rousset,Silvia Scheithauer,Jinyi Shangguan,Odele Straub,Odele Straub,Christian Straubmeier,Eckhard Sturm,Linda J. Tacconi,F. Vincent,Felix Widmann,Ekkehard Wieprecht,Erich Wiezorrek,Julien Woillez,S. Yazici,S. Yazici,D. Ziegler +79 more
TL;DR: In this paper, the authors used the GRAVITY instrument with the four 8.2 m telescopes of the Very Large Telescope Interferometer (VLIW) to obtain K-band spectro-interferometric data on β Pictoris b.
Journal ArticleDOI
Debris Disk Results from the Gemini Planet Imager Exoplanet Survey's Polarimetric Imaging Campaign
Thomas M. Esposito,Paul Kalas,Paul Kalas,Michael P. Fitzgerald,Maxwell A. Millar-Blanchaer,Gaspard Duchêne,Gaspard Duchêne,Jennifer Patience,Justin Hom,Marshall D. Perrin,Robert J. De Rosa,Eugene Chiang,Ian Czekala,Bruce Macintosh,James R. Graham,Megan Ansdell,Pauline Arriaga,Sebastian Bruzzone,Joanna Bulger,Christine Chen,Tara Cotten,Ruobing Dong,Zachary H. Draper,Zachary H. Draper,Katherine B. Follette,Li-Wei Hung,Ronald Lopez,Brenda C. Matthews,Brenda C. Matthews,Johan Mazoyer,Stan Metchev,Stan Metchev,Julien Rameau,Bin Ren,Bin Ren,Malena Rice,Inseok Song,Kevin Stahl,Jason J. Wang,Jason J. Wang,Schuyler Wolff,Barry Zuckerman,S. Mark Ammons,Vanessa P. Bailey,Travis Barman,Jeffrey Chilcote,Jeffrey Chilcote,René Doyon,Benjamin L. Gerard,Benjamin L. Gerard,Stephen J. Goodsell,Alexandra Z. Greenbaum,Pascale Hibon,Sasha Hinkley,Patrick Ingraham,Quinn Konopacky,Jérôme Maire,Franck Marchis,Mark S. Marley,Christian Marois,Christian Marois,Eric L. Nielsen,Eric L. Nielsen,Rebecca Oppenheimer,David Palmer,Lisa Poyneer,Laurent Pueyo,Abhijith Rajan,Fredrik T. Rantakyrö,Jean-Baptiste Ruffio,Dmitry Savransky,Adam C. Schneider,Anand Sivaramakrishnan,Rémi Soummer,Sandrine Thomas,Kimberly Ward-Duong +75 more
TL;DR: The results of a ~4 yr direct imaging survey of 104 stars to resolve and characterize circumstellar debris disks in scattered light as part of the Gemini Planet Imager (GPI) Exoplanet Survey were reported in this article.
References
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Journal ArticleDOI
Direct imaging of multiple planets orbiting the star HR 8799.
Christian Marois,Christian Marois,Christian Marois,Bruce Macintosh,Travis S. Barman,Barry Zuckerman,Inseok Song,Jennifer Patience,David Lafrenière,René Doyon +9 more
TL;DR: High-contrast observations with the Keck and Gemini telescopes have revealed three planets orbiting the star HR 8799, with projected separations of 24, 38, and 68 astronomical units.
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Images of a fourth planet orbiting HR 8799
TL;DR: The HR 8799 planetary system, with its four young giant planets and known cold/warm debris belts, is a unique laboratory in which to study the formation and evolution of giant planets at wide (>10 au) separations.
Journal ArticleDOI
A Giant Planet Imaged in the Disk of the Young Star β Pictoris
Anne-Marie Lagrange,Mickael Bonnefoy,Gael Chauvin,Daniel Apai,David Ehrenreich,Anthony Boccaletti,Damien Gratadour,Daniel Rouan,David Mouillet,Sylvestre Lacour,M. Kasper +10 more
TL;DR: It is shown that the ~10-million-year-oldβ Pictoris system hosts a massive giant planet, β Pictoris b, located 8 to 15 astronomical units from the star, which confirms that gas giant planets form rapidly within disks and validates the use of disk structures as fingerprints of embedded planets.
Journal ArticleDOI
A Circumstellar Disk Around β Pictoris
TL;DR: In this paper, a highly flattened disk has been observed around the fourth-magnitude star Beta Pictoris and it is assumed that the disk is associated with planet formation and that the mass density of the disk falls off with approximately the third power of the radius.
Journal ArticleDOI
A probable giant planet imaged in the β Pictoris disk. VLT/NaCo deep L'-band imaging
Anne-Marie Lagrange,Damien Gratadour,Gael Chauvin,Thierry Fusco,David Ehrenreich,David Mouillet,Gérard Rousset,Gérard Rousset,Daniel Rouan,F. Allard,Eric Gendron,Julien Charton,Laurent M. Mugnier,P. Rabou,J. Montri,Francois Lacombe +15 more
TL;DR: In this paper, a point-like signal is detected at a projected distance of 8 AU from the star, within the northeastern extension of the dust disk, which suggests a formation process by core accretion or disk instabilities rather than binary-like formation processes.
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