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The Orbit and Transit Prospects for β Pictoris b Constrained with One Milliarcsecond Astrometry

Author(s): Wang, Jason J; Graham, James R; Pueyo, Laurent; Kalas, Paul; Millar-Blanchaer, Maxwell A.; et al

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dc.contributor.authorWang, Jason J-
dc.contributor.authorGraham, James R-
dc.contributor.authorPueyo, Laurent-
dc.contributor.authorKalas, Paul-
dc.contributor.authorMillar-Blanchaer, Maxwell A.-
dc.contributor.authorRuffio, Jean-Baptiste-
dc.contributor.authorDe Rosa, Robert J-
dc.contributor.authorAmmons, S Mark-
dc.contributor.authorArriaga, Pauline-
dc.contributor.authorBailey, Vanessa P-
dc.contributor.authorBarman, Travis S-
dc.contributor.authorBulger, Joanna-
dc.contributor.authorBurrows, Adam S.-
dc.contributor.authorCardwell, Andrew-
dc.contributor.authorChen, Christine H-
dc.contributor.authorChilcote, Jeffrey K-
dc.contributor.authorCotten, Tara-
dc.contributor.authorFitzgerald, Michael P.-
dc.contributor.authorFollette, Katherine B-
dc.contributor.authorDoyon, René-
dc.contributor.authorDuchêne, Gaspard-
dc.contributor.authorGreenbaum, Alexandra Z-
dc.contributor.authorHibon, Pascale-
dc.contributor.authorHung, Li-Wei-
dc.contributor.authorIngraham, Patrick-
dc.contributor.authorKonopacky, Quinn M-
dc.contributor.authorLarkin, James E-
dc.contributor.authorMacintosh, Bruce-
dc.contributor.authorMaire, Jérôme-
dc.contributor.authorMarchis, Franck-
dc.contributor.authorMarley, Mark S-
dc.contributor.authorMarois, Christian-
dc.contributor.authorMetchev, Stanimir-
dc.contributor.authorNielsen, Eric L-
dc.contributor.authorOppenheimer, Rebecca-
dc.contributor.authorPalmer, David W-
dc.contributor.authorPatel, Rahul-
dc.contributor.authorPatience, Jenny-
dc.contributor.authorPerrin, Marshall D-
dc.contributor.authorPoyneer, Lisa A.-
dc.contributor.authorRajan, Abhijith-
dc.contributor.authorRameau, Julien-
dc.contributor.authorRantakyrö, Fredrik T.-
dc.contributor.authorSavransky, Dmitry-
dc.contributor.authorSivaramakrishnan, Anand-
dc.contributor.authorSong, Inseok-
dc.contributor.authorSoummer, Rémi-
dc.contributor.authorThomas, Sandrine-
dc.contributor.authorVasisht, Gautam-
dc.contributor.authorVega, David-
dc.contributor.authorWallace, J Kent-
dc.contributor.authorWard-Duong, Kimberly-
dc.contributor.authorWiktorowicz, Sloane J.-
dc.contributor.authorWolff, Schuyler G-
dc.date.accessioned2019-04-10T19:31:42Z-
dc.date.available2019-04-10T19:31:42Z-
dc.date.issued2016-10en_US
dc.identifier.citationWang, Jason J, Graham, James R, Pueyo, Laurent, Kalas, Paul, Millar-Blanchaer, Maxwell A, Ruffio, Jean-Baptiste, De Rosa, Robert J, Ammons, S Mark, Arriaga, Pauline, Bailey, Vanessa P, Barman, Travis S, Bulger, Joanna, Burrows, Adam S, Cardwell, Andrew, Chen, Christine H, Chilcote, Jeffrey K, Cotten, Tara, Fitzgerald, Michael P, Follette, Katherine B, Doyon, René, Duchêne, Gaspard, Greenbaum, Alexandra Z, Hibon, Pascale, Hung, Li-Wei, Ingraham, Patrick, Konopacky, Quinn M, Larkin, James E, Macintosh, Bruce, Maire, Jérôme, Marchis, Franck, Marley, Mark S, Marois, Christian, Metchev, Stanimir, Nielsen, Eric L, Oppenheimer, Rebecca, Palmer, David W, Patel, Rahul, Patience, Jenny, Perrin, Marshall D, Poyneer, Lisa A, Rajan, Abhijith, Rameau, Julien, Rantakyrö, Fredrik T, Savransky, Dmitry, Sivaramakrishnan, Anand, Song, Inseok, Soummer, Remi, Thomas, Sandrine, Vasisht, Gautam, Vega, David, Wallace, J Kent, Ward-Duong, Kimberly, Wiktorowicz, Sloane J, Wolff, Schuyler G. (2016). The Orbit and Transit Prospects for \ensuremathβ Pictoris b Constrained with One Milliarcsecond Astrometry. \aj, 152 (97 - 97. doi:10.3847/0004-6256/152/4/97en_US
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1bt5b-
dc.description.abstractA principal scientific goal of the Gemini Planet Imager(GPI)is obtaining milliarcsecond astrometry to constrain exoplanet orbits. However, astrometry of directly imaged exoplanets is subject to biases, systematic errors, and speckle noise. Here, we describe an analytical procedure to forward model the signal of an exoplanet that accounts for both the observing strategy(angular and spectral differential imaging)and the data reduction method (Karhunen–Loève Image Projection algorithm). We use this forward model to measure the position of an exoplanet in a Bayesian framework employing Gaussian processes and Markov-chain Monte Carlo to account for correlated noise. In the case of GPI data on β Pic b, this technique, which we call Bayesian KLIP-FM Astrometry (BKA), out performs previous techniques and yields 1σerrors at or below the one milliarcsecond level. We validate BKA by fitting a Keplerian orbit to 12 GPI observations along with previous astrometry from other instruments. The statistical properties of the residuals confirm that BKA is accurate and correctly estimates astrometric errors. Our constraints on the orbit of β Pic b firmly rule out the possibility of a transit of the planet at 10-σ significance.However, we confirm that the Hill sphere ofβPic b will transit, giving us a rare chance to probe the circumplanetary environment of a young, evolving exoplanet. We provide an ephemeris for photometric monitoring of the Hill sphere transit event, which will begin at the start of April in 2017 and finish at the end of January in 2018.en_US
dc.language.isoen_USen_US
dc.relation.ispartofAstronomical Journalen_US
dc.rightsAuthor's manuscripten_US
dc.titleThe Orbit and Transit Prospects for β Pictoris b Constrained with One Milliarcsecond Astrometryen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.3847/0004-6256/152/4/97-
dc.date.eissued2016-10-03en_US
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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