Astrometric confirmation and preliminary orbital parameters of the young exoplanet 51 eridani b with the gemini planet imager

Robert J.D. De Rosa; Eric L. Nielsen; Sarah C. Blunt; James R. Graham; Quinn M. Konopacky; Christian Marois; Laurent Pueyo; Julien Rameau; Dominic M. Ryan; Jason J. Wang; Vanessa Bailey; Ashley Chontos; Daniel C. Fabrycky; Katherine B. Follette; Bruce MacIntosh; Franck Marchis; S. Mark Ammons; Pauline Arriaga; Jeffrey K. Chilcote; Tara H. Cotten; René Doyon; Gaspard Duchene; Thomas M. Esposito; Michael P. Fitzgerald; Benjamin Gerard; Stephen J. Goodsell; Alexandra Z. Greenbaum; Pascale Hibon; Patrick Ingraham; Mara Johnson-Groh; Paul G. Kalas; David Lafreniere; Jerome Maire; Stanimir Metchev; Maxwell A. Millar-Blanchaer; Katie M. Morzinski; Rebecca Oppenheimer; Rahul I. Patel; Jennifer L. Patience; Marshall D. Perrin; Abhijith Rajan; Fredrik T. Rantakyrö; Jean Baptiste Ruffio; Adam C. Schneider; Anand Sivaramakrishnan; Inseok Song; Debby Tran; Gautam Vasisht; Kimberly Ward-Duong; Schuyler G. Wolff

doi:10.1088/2041-8205/814/1/L3

Astrometric confirmation and preliminary orbital parameters of the young exoplanet 51 eridani b with the gemini planet imager

Robert J.D. De Rosa, Eric L. Nielsen, Sarah C. Blunt, James R. Graham, Quinn M. Konopacky, Christian Marois, Laurent Pueyo, Julien Rameau, Dominic M. Ryan, Jason J. Wang, Vanessa Bailey, Ashley Chontos, Daniel C. Fabrycky, Katherine B. Follette, Bruce MacIntosh, Franck Marchis, S. Mark Ammons, Pauline Arriaga, Jeffrey K. Chilcote, Tara H. CottenRené Doyon, Gaspard Duchene, Thomas M. Esposito, Michael P. Fitzgerald, Benjamin Gerard, Stephen J. Goodsell, Alexandra Z. Greenbaum, Pascale Hibon, Patrick Ingraham, Mara Johnson-Groh, Paul G. Kalas, David Lafreniere, Jerome Maire, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Katie M. Morzinski, Rebecca Oppenheimer, Rahul I. Patel, Jennifer L. Patience, Marshall D. Perrin, Abhijith Rajan, Fredrik T. Rantakyrö, Jean Baptiste Ruffio, Adam C. Schneider, Anand Sivaramakrishnan, Inseok Song, Debby Tran, Gautam Vasisht, Kimberly Ward-Duong, Schuyler G. Wolff

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58 Scopus citations

Abstract

We present new Gemini Planet Imager observations of the young exoplanet 51 Eridani b that provide further evidence that the companion is physically associated with 51 Eridani. Combining this new astrometric measurement with those reported in the literature, we significantly reduce the posterior probability that 51 Eridani b is an unbound foreground or background T-dwarf in a chance alignment with 51 Eridani to 2 × 10^-7, an order of magnitude lower than previously reported. If 51 Eridani b is indeed a bound object, then we have detected orbital motion of the planet between the discovery epoch and the latest epoch. By implementing a computationally efficient Monte Carlo technique, preliminary constraints are placed on the orbital parameters of the system. The current set of astrometric measurements suggest an orbital semimajor axis of AU, corresponding to a period of years (assuming a mass of 1.75 M_o for the central star), and an inclination of deg. The remaining orbital elements are only marginally constrained by the current measurements. These preliminary values suggest an orbit that does not share the same inclination as the orbit of the distant M-dwarf binary, GJ 3305, which is a wide physically bound companion to 51 Eridani.

Original language	English (US)
Article number	L3
Journal	Astrophysical Journal Letters
Volume	814
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/814/1/L3
State	Published - Nov 20 2015
Externally published	Yes

Keywords

planetary systems
planets and satellites: detection
stars: individual (51 Eri)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/2041-8205/814/1/L3

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De Rosa, R. J. D., Nielsen, E. L., Blunt, S. C., Graham, J. R., Konopacky, Q. M., Marois, C., Pueyo, L., Rameau, J., Ryan, D. M., Wang, J. J., Bailey, V., Chontos, A., Fabrycky, D. C., Follette, K. B., MacIntosh, B., Marchis, F., Ammons, S. M., Arriaga, P., Chilcote, J. K., ... Wolff, S. G. (2015). Astrometric confirmation and preliminary orbital parameters of the young exoplanet 51 eridani b with the gemini planet imager. Astrophysical Journal Letters, 814(1), Article L3. https://doi.org/10.1088/2041-8205/814/1/L3

De Rosa, RJD, Nielsen, EL, Blunt, SC, Graham, JR, Konopacky, QM, Marois, C, Pueyo, L, Rameau, J, Ryan, DM, Wang, JJ, Bailey, V, Chontos, A, Fabrycky, DC, Follette, KB, MacIntosh, B, Marchis, F, Ammons, SM, Arriaga, P, Chilcote, JK, Cotten, TH, Doyon, R, Duchene, G, Esposito, TM, Fitzgerald, MP, Gerard, B, Goodsell, SJ, Greenbaum, AZ, Hibon, P, Ingraham, P, Johnson-Groh, M, Kalas, PG, Lafreniere, D, Maire, J, Metchev, S, Millar-Blanchaer, MA, Morzinski, KM, Oppenheimer, R, Patel, RI, Patience, JL, Perrin, MD, Rajan, A, Rantakyrö, FT, Ruffio, JB, Schneider, AC, Sivaramakrishnan, A, Song, I, Tran, D, Vasisht, G, Ward-Duong, K & Wolff, SG 2015, 'Astrometric confirmation and preliminary orbital parameters of the young exoplanet 51 eridani b with the gemini planet imager', Astrophysical Journal Letters, vol. 814, no. 1, L3. https://doi.org/10.1088/2041-8205/814/1/L3

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title = "Astrometric confirmation and preliminary orbital parameters of the young exoplanet 51 eridani b with the gemini planet imager",

abstract = "We present new Gemini Planet Imager observations of the young exoplanet 51 Eridani b that provide further evidence that the companion is physically associated with 51 Eridani. Combining this new astrometric measurement with those reported in the literature, we significantly reduce the posterior probability that 51 Eridani b is an unbound foreground or background T-dwarf in a chance alignment with 51 Eridani to 2 × 10-7, an order of magnitude lower than previously reported. If 51 Eridani b is indeed a bound object, then we have detected orbital motion of the planet between the discovery epoch and the latest epoch. By implementing a computationally efficient Monte Carlo technique, preliminary constraints are placed on the orbital parameters of the system. The current set of astrometric measurements suggest an orbital semimajor axis of AU, corresponding to a period of years (assuming a mass of 1.75 Mo for the central star), and an inclination of deg. The remaining orbital elements are only marginally constrained by the current measurements. These preliminary values suggest an orbit that does not share the same inclination as the orbit of the distant M-dwarf binary, GJ 3305, which is a wide physically bound companion to 51 Eridani.",

keywords = "planetary systems, planets and satellites: detection, stars: individual (51 Eri)",

author = "{De Rosa}, {Robert J.D.} and Nielsen, {Eric L.} and Blunt, {Sarah C.} and Graham, {James R.} and Konopacky, {Quinn M.} and Christian Marois and Laurent Pueyo and Julien Rameau and Ryan, {Dominic M.} and Wang, {Jason J.} and Vanessa Bailey and Ashley Chontos and Fabrycky, {Daniel C.} and Follette, {Katherine B.} and Bruce MacIntosh and Franck Marchis and Ammons, {S. Mark} and Pauline Arriaga and Chilcote, {Jeffrey K.} and Cotten, {Tara H.} and Ren{\'e} Doyon and Gaspard Duchene and Esposito, {Thomas M.} and Fitzgerald, {Michael P.} and Benjamin Gerard and Goodsell, {Stephen J.} and Greenbaum, {Alexandra Z.} and Pascale Hibon and Patrick Ingraham and Mara Johnson-Groh and Kalas, {Paul G.} and David Lafreniere and Jerome Maire and Stanimir Metchev and Millar-Blanchaer, {Maxwell A.} and Morzinski, {Katie M.} and Rebecca Oppenheimer and Patel, {Rahul I.} and Patience, {Jennifer L.} and Perrin, {Marshall D.} and Abhijith Rajan and Rantakyr{\"o}, {Fredrik T.} and Ruffio, {Jean Baptiste} and Schneider, {Adam C.} and Anand Sivaramakrishnan and Inseok Song and Debby Tran and Gautam Vasisht and Kimberly Ward-Duong and Wolff, {Schuyler G.}",

year = "2015",

month = nov,

day = "20",

doi = "10.1088/2041-8205/814/1/L3",

language = "English (US)",

volume = "814",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

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TY - JOUR

T1 - Astrometric confirmation and preliminary orbital parameters of the young exoplanet 51 eridani b with the gemini planet imager

AU - De Rosa, Robert J.D.

AU - Nielsen, Eric L.

AU - Blunt, Sarah C.

AU - Graham, James R.

AU - Konopacky, Quinn M.

AU - Marois, Christian

AU - Pueyo, Laurent

AU - Rameau, Julien

AU - Ryan, Dominic M.

AU - Wang, Jason J.

AU - Bailey, Vanessa

AU - Chontos, Ashley

AU - Fabrycky, Daniel C.

AU - Follette, Katherine B.

AU - MacIntosh, Bruce

AU - Marchis, Franck

AU - Ammons, S. Mark

AU - Arriaga, Pauline

AU - Chilcote, Jeffrey K.

AU - Cotten, Tara H.

AU - Doyon, René

AU - Duchene, Gaspard

AU - Esposito, Thomas M.

AU - Fitzgerald, Michael P.

AU - Gerard, Benjamin

AU - Goodsell, Stephen J.

AU - Greenbaum, Alexandra Z.

AU - Hibon, Pascale

AU - Ingraham, Patrick

AU - Johnson-Groh, Mara

AU - Kalas, Paul G.

AU - Lafreniere, David

AU - Maire, Jerome

AU - Metchev, Stanimir

AU - Millar-Blanchaer, Maxwell A.

AU - Morzinski, Katie M.

AU - Oppenheimer, Rebecca

AU - Patel, Rahul I.

AU - Patience, Jennifer L.

AU - Perrin, Marshall D.

AU - Rajan, Abhijith

AU - Rantakyrö, Fredrik T.

AU - Ruffio, Jean Baptiste

AU - Schneider, Adam C.

AU - Sivaramakrishnan, Anand

AU - Song, Inseok

AU - Tran, Debby

AU - Vasisht, Gautam

AU - Ward-Duong, Kimberly

AU - Wolff, Schuyler G.

PY - 2015/11/20

Y1 - 2015/11/20

N2 - We present new Gemini Planet Imager observations of the young exoplanet 51 Eridani b that provide further evidence that the companion is physically associated with 51 Eridani. Combining this new astrometric measurement with those reported in the literature, we significantly reduce the posterior probability that 51 Eridani b is an unbound foreground or background T-dwarf in a chance alignment with 51 Eridani to 2 × 10-7, an order of magnitude lower than previously reported. If 51 Eridani b is indeed a bound object, then we have detected orbital motion of the planet between the discovery epoch and the latest epoch. By implementing a computationally efficient Monte Carlo technique, preliminary constraints are placed on the orbital parameters of the system. The current set of astrometric measurements suggest an orbital semimajor axis of AU, corresponding to a period of years (assuming a mass of 1.75 Mo for the central star), and an inclination of deg. The remaining orbital elements are only marginally constrained by the current measurements. These preliminary values suggest an orbit that does not share the same inclination as the orbit of the distant M-dwarf binary, GJ 3305, which is a wide physically bound companion to 51 Eridani.

AB - We present new Gemini Planet Imager observations of the young exoplanet 51 Eridani b that provide further evidence that the companion is physically associated with 51 Eridani. Combining this new astrometric measurement with those reported in the literature, we significantly reduce the posterior probability that 51 Eridani b is an unbound foreground or background T-dwarf in a chance alignment with 51 Eridani to 2 × 10-7, an order of magnitude lower than previously reported. If 51 Eridani b is indeed a bound object, then we have detected orbital motion of the planet between the discovery epoch and the latest epoch. By implementing a computationally efficient Monte Carlo technique, preliminary constraints are placed on the orbital parameters of the system. The current set of astrometric measurements suggest an orbital semimajor axis of AU, corresponding to a period of years (assuming a mass of 1.75 Mo for the central star), and an inclination of deg. The remaining orbital elements are only marginally constrained by the current measurements. These preliminary values suggest an orbit that does not share the same inclination as the orbit of the distant M-dwarf binary, GJ 3305, which is a wide physically bound companion to 51 Eridani.

KW - planetary systems

KW - planets and satellites: detection

KW - stars: individual (51 Eri)

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UR - http://www.scopus.com/inward/citedby.url?scp=84948777176&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/814/1/L3

DO - 10.1088/2041-8205/814/1/L3

M3 - Article

AN - SCOPUS:84948777176

SN - 2041-8205

VL - 814

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L3

ER -

Astrometric confirmation and preliminary orbital parameters of the young exoplanet 51 eridani b with the gemini planet imager

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