An Updated Visual Orbit of the Directly Imaged Exoplanet 51 Eridani b and Prospects for a Dynamical Mass Measurement with Gaia

Rosa, Robert De; Nielsen, Eric L.; Wang, Jason J.; Ammons, S. Mark; Duchêne, Gaspard; Macintosh, Bruce; Rameau, Julien; Bailey, Vanessa P.; Barman, Travis; Bulger, Joanna; Chilcote, Jeffrey; Cotten, Tara; Doyon, Rene; Esposito, Thomas M.; Fitzgerald, Michael P.; Follette, Katherine B.; Gerard, Benjamin L.; Goodsell, Stephen J.; Graham, James R.; Greenbaum, Alexandra Z.; Hibon, Pascale; Hom, Justin; Hung, Li-Wei; Ingraham, Patrick; Kalas, Paul; Konopacky, Quinn; Larkin, James E.; Maire, Jérôme; Marchis, Franck; Marley, Mark S.; Marois, Christian; Metchev, Stanimir; Millar-Blanchaer, Maxwell A.; Oppenheimer, Rebecca; Palmer, David; Patience, Jennifer; Perrin, Marshall; Poyneer, Lisa; Pueyo, Laurent; Rajan, Abhijith; Rantakyrö, Fredrik T.; Ren, Bin; Ruffio, Jean-Baptiste; Savransky, Dmitry; Schneider, Adam C.; Sivaramakrishnan, Anand; Song, Inseok; Soummer, Remi; Tallis, Melisa; Thomas, Sandrine; Wallace, J. Kent; Ward-Duong, Kimberly; Wiktorowicz, Sloane; Wolff, Schuyler

doi:10.3847/1538-3881/ab4da4

Title: An Updated Visual Orbit of the Directly Imaged Exoplanet 51 Eridani b and Prospects for a Dynamical Mass Measurement with Gaia

Journal Article · Tue Dec 10 00:00:00 EST 2019 · The Astronomical Journal (Online)

DOI:https://doi.org/10.3847/1538-3881/ab4da4· OSTI ID:1836928

;

; Doyon, Rene;

;

; Graham, James R.;

We present a revision to the visual orbit of the young, directly imaged exoplanet 51 Eridani b using four years of observations with the Gemini Planet Imager. The relative astrometry is consistent with an eccentric ($$e={0.53}_{-0.13}^{+0.09}$$) orbit at an intermediate inclination ($$i={136}_{-11}^{+10}$$ °), although circular orbits cannot be excluded due to the complex shape of the multidimensional posterior distribution. We find a semimajor axis of $${11.1}_{-1.3}^{+4.2}$$ au and a period of $${28.1}_{-4.9}^{+17.2}$$ yr, assuming a mass of 1.75 $${M}_{\odot }$$ for the host star. We find consistent values with a recent analysis of VLT/SPHERE data covering a similar baseline. We investigate the potential of using the absolute astrometry of the host star to obtain a dynamical mass constraint for the planet. The astrometric acceleration of 51 Eri derived from a comparison of the Hipparcos and Gaia catalogs was found to be inconsistent at the 2σ–3σ level with the predicted reflex motion induced by the orbiting planet. Potential sources of this inconsistency include a combination of random and systematic errors between the two astrometric catalogs and the signature of an additional companion within the system interior to current detection limits. We also explored the potential of using Gaia astrometry alone for a dynamical mass measurement of the planet by simulating Gaia measurements of the motion of the photocenter of the system over the course of the extended 8 yr mission. We find that such a measurement is only possible (>98% probability) given the most optimistic predictions for the Gaia scan astrometric uncertainties for bright stars and a high mass for the planet (≳3.6 MJup).

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: GPIES Survey Team

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1836928

Report Number(s):: LLNL-JRNL-829582; 1045537; TRN: US2300397

Journal Information:: The Astronomical Journal (Online), Vol. 159, Issue 1; ISSN 1538-3881

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

References (63)

Synthetic Spectra and Colors of Young Giant Planet Atmospheres: Effects of Initial Conditions and Atmospheric Metallicity Fortney, J. J.; Marley, M. S.; Saumon, D. The Astrophysical Journal, Vol. 683, Issue 2 https://doi.org/10.1086/589942	journal	August 2008
Dynamical Mass Measurement of the Young Spectroscopic Binary V343 Normae AaAb Resolved With the Gemini Planet Imager Nielsen, Eric L.; De Rosa, Robert J.; Wang, Jason arXiv https://doi.org/10.48550/arxiv.1609.09095	text	January 2016
Models of very-low-mass stars, brown dwarfs and exoplanets Allard, F.; Homeier, D.; Freytag, B. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 370, Issue 1968 https://doi.org/10.1098/rsta.2011.0269	journal	June 2012
The mass of the young planet Beta Pictoris b through the astrometric motion of its host star Snellen, I. A. G.; Brown, A. G. A. Nature Astronomy, Vol. 2, Issue 11 https://doi.org/10.1038/s41550-018-0561-6	journal	August 2018
Characterizing 51 Eri b from 1 to 5 μ m: A Partly Cloudy Exoplanet Rajan, Abhijith; Rameau, Julien; Rosa, Robert J. De The Astronomical Journal, Vol. 154, Issue 1 https://doi.org/10.3847/1538-3881/aa74db	journal	June 2017
Observing Exoplanets with High Dispersion Coronagraphy. I. The Scientific Potential of Current and Next-generation Large Ground and Space Telescopes Wang, Ji; Mawet, Dimitri; Ruane, Garreth The Astronomical Journal, Vol. 153, Issue 4 https://doi.org/10.3847/1538-3881/aa6474	journal	March 2017
The mass of the young planet Pictoris b through the astrometric motion of its host star Snellen, Ignas; Brown, Anthony arXiv https://doi.org/10.48550/arxiv.1808.06257	text	January 2018
A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood Bell, Cameron P. M.; Mamajek, Eric E.; Naylor, Tim Monthly Notices of the Royal Astronomical Society, Vol. 454, Issue 1 https://doi.org/10.1093/mnras/stv1981	journal	September 2015
Gaia Data Release 2 : Summary of the contents and survey properties Brown, A. G. A.; Vallenari, A.; Prusti, T. Astronomy & Astrophysics, Vol. 616 https://doi.org/10.1051/0004-6361/201833051	journal	August 2018
The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I. The Astronomical Journal, Vol. 122, Issue 6 https://doi.org/10.1086/323920	journal	December 2001
Fast spin of the young extrasolar planet β Pictoris b Snellen, Ignas A. G.; Brandl, Bernhard R.; de Kok, Remco J. Nature, Vol. 509, Issue 7498 https://doi.org/10.1038/nature13253	journal	April 2014
Gaia Data Release 2 : The astrometric solution Lindegren, L.; Hernández, J.; Bombrun, A. Astronomy & Astrophysics, Vol. 616 https://doi.org/10.1051/0004-6361/201832727	journal	August 2018
Observing Exoplanets with High Dispersion Coronagraphy. I. The scientific potential of current and next-generation large ground and space telescopes Wang, Ji; Mawet, Dimitri; Ruane, Garreth arXiv https://doi.org/10.48550/arxiv.1703.00582	text	January 2017
On the Luminosity of Young Jupiters Marley, Mark S.; Fortney, Jonathan J.; Hubickyj, Olenka The Astrophysical Journal, Vol. 655, Issue 1 https://doi.org/10.1086/509759	journal	January 2007
51 Eri and GJ 3305: A 10-15 Myr old binary star system at 30 parsecs Feigelson, E. D.; Lawson, W. A.; Stark, M. arXiv https://doi.org/10.48550/arxiv.astro-ph/0511618	text	January 2005
Gaia Data Release 2. Summary of the contents and survey properties Brown, A. G. A.; Vallenari, A.; Prusti, T. EDP Sciences https://doi.org/10.48350/158409	text	January 2018
Hint of curvature in the orbital motion of the exoplanet 51 Eridani b using 3 yr of VLT/SPHERE monitoring Maire, A. -L.; Rodet, L.; Cantalloube, F. Astronomy & Astrophysics, Vol. 624 https://doi.org/10.1051/0004-6361/201935031	journal	April 2019
The Hipparcos – Gaia Catalog of Accelerations Brandt, Timothy D. The Astrophysical Journal Supplement Series, Vol. 239, Issue 2 https://doi.org/10.3847/1538-4365/aaec06	journal	December 2018
`emcee` : The MCMC Hammer Foreman-Mackey, Daniel; Hogg, David W.; Lang, Dustin Publications of the Astronomical Society of the Pacific, Vol. 125, Issue 925 https://doi.org/10.1086/670067	journal	March 2013
Automated data processing architecture for the Gemini Planet Imager Exoplanet Survey Wang, Jason; Perrin, Marshall; Savransky, Dmitry arXiv https://doi.org/10.48550/arxiv.1801.01902	text	January 2018
DYNAMICAL MASS MEASUREMENT OF THE YOUNG SPECTROSCOPIC BINARY V343 NORMAE AaAb RESOLVED WITH THE GEMINI PLANET IMAGER Nielsen, Eric L.; Rosa, Robert J. De; Wang, Jason The Astronomical Journal, Vol. 152, Issue 6 https://doi.org/10.3847/0004-6256/152/6/175	journal	November 2016
Astrometric exoplanet detection with Gaia Perryman, Michael; Hartman, Joel; Bakos, Gáspár arXiv https://doi.org/10.48550/arxiv.1411.1173	text	January 2014
Stellar and substellar companions of nearby stars from Gaia DR2 : Binarity from proper motion anomaly⋆ Kervella, Pierre; Arenou, Frédéric; Mignard, François Astronomy & Astrophysics, Vol. 623 https://doi.org/10.1051/0004-6361/201834371	journal	March 2019
The Gemini NICI Planet-Finding Campaign: The Frequency of Giant Planets around Young B and A Stars Nielsen, Eric L.; Liu, Michael C.; Wahhaj, Zahed arXiv https://doi.org/10.48550/arxiv.1306.1233	text	January 2013
An independent determination of Fomalhaut b's orbit and the dynamical effects on the outer dust belt Beust, Hervé; Augereau, Jean-Charles; Bonsor, Amy arXiv https://doi.org/10.48550/arxiv.1311.5035	text	January 2013
Hipparcos, the New Reduction of the Raw Data van Leeuwen, Floor Astrophysics and Space Science Library https://doi.org/10.1007/978-1-4020-6342-8	book	January 2007
Astropy: A community Python package for astronomy Robitaille, Thomas P.; Tollerud, Erik J.; Greenfield, Perry Astronomy & Astrophysics, Vol. 558 https://doi.org/10.1051/0004-6361/201322068	journal	September 2013
Validation of the new Hipparcos reduction van Leeuwen, F. arXiv https://doi.org/10.48550/arxiv.0708.1752	text	January 2007
THE ORBIT AND TRANSIT PROSPECTS FOR β PICTORIS b CONSTRAINED WITH ONE MILLIARCSECOND ASTROMETRY Wang, Jason J.; Graham, James R.; Pueyo, Laurent The Astronomical Journal, Vol. 152, Issue 4 https://doi.org/10.3847/0004-6256/152/4/97	journal	October 2016
Gaia Data Release 2 : Catalogue validation Arenou, F.; Luri, X.; Babusiaux, C. Astronomy & Astrophysics, Vol. 616 https://doi.org/10.1051/0004-6361/201833234	journal	August 2018
A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood Bell, Cameron P. M.; Mamajek, Eric E.; Naylor, Tim arXiv https://doi.org/10.48550/arxiv.1508.05955	text	January 2015
Gaia Data Release 2: Catalogue validation Arenou, F.; Luri, X.; Babusiaux, C. arXiv https://doi.org/10.48550/arxiv.1804.09375	text	January 2018
An independent determination of Fomalhaut b’s orbit and the dynamical effects on the outer dust belt Beust, H.; Augereau, J. -C.; Bonsor, A. Astronomy & Astrophysics, Vol. 561 https://doi.org/10.1051/0004-6361/201322229	journal	December 2013
51 Eridani and GJ 3305: A 10-15 Myr old Binary Star System at 30 Parsecs Feigelson, E. D.; Lawson, W. A.; Stark, M. The Astronomical Journal, Vol. 131, Issue 3 https://doi.org/10.1086/499923	journal	March 2006
Dynamical Constraints on the HR 8799 Planets with GPI Wang, Jason J.; Graham, James R.; Dawson, Rebekah The Astronomical Journal, Vol. 156, Issue 5 https://doi.org/10.3847/1538-3881/aae150	journal	October 2018
Detection and Characterization of Exoplanets and Disks using Projections on Karhunen-Loeve Eigenimages Soummer, Remi; Pueyo, Laurent; Larkin, James arXiv https://doi.org/10.48550/arxiv.1207.4197	text	January 2012
Precise Dynamical Masses of Directly Imaged Companions from Relative Astrometry, Radial Velocities, and Hipparcos – Gaia DR2 Accelerations Brandt, Timothy D.; Dupuy, Trent J.; Bowler, Brendan P. The Astronomical Journal, Vol. 158, Issue 4 https://doi.org/10.3847/1538-3881/ab04a8	journal	September 2019
Observed Orbital Eccentricities Abt, Helmut A. Proceedings of the International Astronomical Union, Vol. 2, Issue S240 https://doi.org/10.1017/s1743921307004371	journal	August 2006
Angular Differential Imaging: A Powerful High‐Contrast Imaging Technique Marois, Christian; Lafreniere, David; Doyon, Rene The Astrophysical Journal, Vol. 641, Issue 1 https://doi.org/10.1086/500401	journal	April 2006
ASTROMETRIC EXOPLANET DETECTION WITH GAIA Perryman, Michael; Hartman, Joel; Bakos, Gáspár Á. The Astrophysical Journal, Vol. 797, Issue 1 https://doi.org/10.1088/0004-637X/797/1/14	journal	November 2014
The Gaia mission Prusti, T.; de Bruijne, J. H. J.; Brown, A. G. A. Astronomy & Astrophysics, Vol. 595 https://doi.org/10.1051/0004-6361/201629272	journal	November 2016
The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au Nielsen, El; De Rosa, Rj; Macintosh, B. Apollo - University of Cambridge Repository https://doi.org/10.17863/cam.39168	text	January 2019
Validation of the new Hipparcos reduction van Leeuwen, F. Astronomy & Astrophysics, Vol. 474, Issue 2 https://doi.org/10.1051/0004-6361:20078357	journal	August 2007
Gemini planet imager observational calibrations VIII: characterization and role of satellite spots Wang, Jason J.; Rajan, Abhijith; Graham, James R. SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings https://doi.org/10.1117/12.2055753	conference	July 2014
Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 209458 Baraffe, I.; Chabrier, G.; Barman, T. S. Astronomy & Astrophysics, Vol. 402, Issue 2 https://doi.org/10.1051/0004-6361:20030252	journal	April 2003
First light of the Gemini Planet Imager Macintosh, B.; Graham, J. R.; Ingraham, P. Proceedings of the National Academy of Sciences, Vol. 111, Issue 35 https://doi.org/10.1073/pnas.1304215111	journal	May 2014
A Model-independent Mass and Moderate Eccentricity for β Pic b Dupuy, Trent J.; Brandt, Timothy D.; Kratter, Kaitlin M. The Astrophysical Journal, Vol. 871, Issue 1 https://doi.org/10.3847/2041-8213/aafb31	journal	January 2019
Observed Orbital Eccentricities Abt, Helmut A. The Astrophysical Journal, Vol. 629, Issue 1 https://doi.org/10.1086/431207	journal	August 2005
S$\mathsf{_{B^9}}$: The ninth catalogue of spectroscopic binary orbits Pourbaix, D.; Tokovinin, A. A.; Batten, A. H. Astronomy & Astrophysics, Vol. 424, Issue 2 https://doi.org/10.1051/0004-6361:20041213	journal	August 2004
Gemini Planet Imager Observational Calibrations VIII: Characterization and Role of Satellite Spots Wang, Jason J.; Rajan, Abhijith; Graham, James R. arXiv https://doi.org/10.48550/arxiv.1407.2308	text	January 2014
Matplotlib: A 2D Graphics Environment Hunter, John D. Computing in Science & Engineering, Vol. 9, Issue 3 https://doi.org/10.1109/MCSE.2007.55	journal	January 2007
1–2.4 μ m Near-IR Spectrum of the Giant Planet β Pictoris b Obtained with the Gemini Planet Imager Chilcote, Jeffrey; Pueyo, Laurent; Rosa, Robert J. De The Astronomical Journal, Vol. 153, Issue 4 https://doi.org/10.3847/1538-3881/aa63e9	journal	March 2017
Astrometric Confirmation and Preliminary Orbital Parameters of the Young Exoplanet 51 Eridani b with the Gemini Planet Imager De Rosa, Robert J.; Nielsen, Eric L.; Blunt, Sarah C. arXiv https://doi.org/10.48550/arxiv.1509.07514	text	January 2015
Discovery and spectroscopy of the young Jovian planet 51 Eri b with the Gemini Planet Imager Macintosh, B.; Graham, J. R.; Barman, T. arXiv https://doi.org/10.48550/arxiv.1508.03084	text	January 2015
Gemini Planet Imager Observational Calibrations I: Overview of the GPI Data Reduction Pipeline Perrin, Marshall D.; Maire, Jérôme; Ingraham, Patrick arXiv https://doi.org/10.48550/arxiv.1407.2301	text	January 2014
The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au Nielsen, Eric L.; De Rosa, Robert J.; Macintosh, Bruce The Astronomical Journal, Vol. 158, Issue 1 https://doi.org/10.3847/1538-3881/ab16e9	journal	June 2019
Gemini Planet Imager observational calibrations I: Overview of the GPI data reduction pipeline Perrin, Marshall D.; Maire, Jérôme; Ingraham, Patrick SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings https://doi.org/10.1117/12.2055246	conference	July 2014
The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars Abt, Helmut A.; Morrell, Nidia I. The Astrophysical Journal Supplement Series, Vol. 99 https://doi.org/10.1086/192182	journal	July 1995
Precise Dynamical Masses of Directly Imaged Companions from Relative Astrometry, Radial Velocities, and Hipparcos-Gaia DR2 Accelerations Brandt, Timothy D.; Dupuy, Trent J.; Bowler, Brendan P. arXiv https://doi.org/10.48550/arxiv.1811.07285	text	January 2018
Discovery and spectroscopy of the young jovian planet 51 Eri b with the Gemini Planet Imager Macintosh, B.; Graham, J. R.; Barman, T. Science, Vol. 350, Issue 6256 https://doi.org/10.1126/science.aac5891	journal	August 2015
Improving dynamical mass constraints for intermediate-period substellar companions using Gaia DR2 Calissendorff, Per; Janson, Markus Astronomy & Astrophysics, Vol. 615 https://doi.org/10.1051/0004-6361/201833309	journal	July 2018
Search for brown-dwarf companions of stars Sahlmann, J.; Ségransan, D.; Queloz, D. Astronomy & Astrophysics, Vol. 525 https://doi.org/10.1051/0004-6361/201015427	journal	December 2010
The β Pictoris Moving Group Zuckerman, B.; Song, Inseok; Bessell, M. S. The Astrophysical Journal, Vol. 562, Issue 1 https://doi.org/10.1086/337968	journal	November 2001

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