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
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TLDR
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.Abstract:
Direct imaging of exoplanetary systems is a powerful technique that can reveal Jupiter-like planets in wide orbits, can enable detailed characterization of planetary atmospheres, and is a key step toward imaging Earth-like planets. Imaging detections are challenging because of the combined effect of small angular separation and large luminosity contrast between a planet and its host star. 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. Multi-epoch data show counter clockwise orbital motion for all three imaged planets. The low luminosity of the companions and the estimated age of the system imply planetary masses between 5 and 13 times that of Jupiter. This system resembles a scaled-up version of the outer portion of our solar system.read more
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KELT-20b: A Giant Planet with a Period of P ∼ 3.5 days Transiting the V ∼ 7.6 Early A Star HD 185603
Michael B. Lund,Joseph E. Rodriguez,George Zhou,B. Scott Gaudi,Keivan G. Stassun,Keivan G. Stassun,Marshall C. Johnson,Allyson Bieryla,Ryan J. Oelkers,Daniel J. Stevens,Karen A. Collins,Kaloyan Penev,Samuel N. Quinn,David W. Latham,Steven Villanueva,Jason D. Eastman,John F. Kielkopf,Thomas E. Oberst,Eric L. N. Jensen,David H. Cohen,Michael D. Joner,Denise C. Stephens,Howard M. Relles,Giorgio Corfini,Joao Gregorio,Roberto Zambelli,Gilbert A. Esquerdo,Michael L. Calkins,Perry Berlind,David R. Ciardi,Courtney D. Dressing,Courtney D. Dressing,Rahul Patel,Patrick Gagnon,Patrick Gagnon,Erica J. Gonzales,Thomas G. Beatty,Robert J. Siverd,Jonathan Labadie-Bartz,Rudolf B. Kuhn,Knicole D. Colón,David J. James,Joshua Pepper,Benjamin J. Fulton,Benjamin J. Fulton,Kim K. McLeod,Chris Stockdale,Sebastiano Calchi Novati,Sebastiano Calchi Novati,Darren L. DePoy,Andrew Gould,Jennifer L. Marshall,Mark Trueblood,Patricia Trueblood,John Asher Johnson,Jason T. Wright,Nate McCrady,Robert A. Wittenmyer,Samson A. Johnson,Anthony Sergi,Maurice Wilson,David H. Sliski +61 more
TL;DR: In this paper, the authors reported the discovery of KELT-20b, a hot Jupiter transiting a V ~ 7.6 early A star, HD 185603, with an orbital period of P ≃ 3.47 days.
Journal ArticleDOI
Miniature Exoplanet Radial Velocity Array (MINERVA) I. Design, Commissioning, and First Science Results
Jonathan J. Swift,Michael Bottom,John Asher Johnson,Jason T. Wright,Nate McCrady,Robert A. Wittenmyer,Peter Plavchan,Reed Riddle,Philip S. Muirhead,Erich Herzig,Justin Myles,Cullen H. Blake,Jason D. Eastman,Thomas G. Beatty,Stuart I. Barnes,Steven R. Gibson,Brian Lin,Ming Zhao,Paul Gardner,Emilio E. Falco,Stephen Criswell,Chantanelle Nava,Connor Robinson,David H. Sliski,Richard Hedrick,Kevin Ivarsen,Annie Hjelstrom,Jon de Vera,Andrew Szentgyorgyi +28 more
TL;DR: The MINiature Exoplanet Radial Velocity Array (MINERVA) as mentioned in this paper is a US-based observational facility dedicated to the discovery and characterization of exoplanets around a nearby sample of bright stars.
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Cool Jupiters greatly outnumber their toasty siblings: occurrence rates from the Anglo-Australian Planet Search
Robert A. Wittenmyer,Songhu Wang,Jonathan Horner,R. P. Butler,C. G. Tinney,Brad D. Carter,Duncan J. Wright,Hugh R. A. Jones,Jeremy Bailey,Simon J. O'Toole,Simon J. O'Toole,Daniel Johns +11 more
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Apodized pupil lyot coronagraphs for arbitrary apertures. iv. reduced inner working angle and increased robustness to low-order aberrations
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