HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen
Abstrak
We present confirmation of HD 143811 AB b, a substellar companion to spectroscopic binary HD 143811 AB through direct imaging with the Gemini Planet Imager (GPI) and Keck NIRC2. HD 143811 AB was observed as a part of the GPI Exoplanet Survey in 2016 and 2019 and is a member of the Sco-Cen star formation region. The exoplanet is detected ∼430 mas from the host star by GPI. With two GPI epochs and one from Keck/NIRC2 in 2022, we confirm through common proper motion analysis that the object is bound to its host star. We derive an orbit with a semimajor axis of $6{4}_{-14}^{+32}$ au and eccentricity ${0.23}_{-0.16}^{+0.24}$ . Spectral analysis of the GPI H -band spectrum and NIRC2 L′ photometry provides additional proof that this object is a substellar companion. We compare the spectrum of HD 143811 AB b to PHOENIX stellar models and Exo-Radioactive-Convective Equilibrium Model (REM) exoplanet atmosphere models and find that Exo-REM models provide the best fits to the data. From the Exo-REM models, we derive an effective temperature of $104{2}_{-132}^{+178}$ K for the planet and translate the derived luminosity of the planet to a mass of 5.6 ± 1.1 M _Jup assuming hot-start evolutionary models. HD 143811 AB b is the first directly imaged planet around a binary that is not on an ultrawide orbit. Future characterization of this object will shed light on the formation of planets around binary star systems.
Topik & Kata Kunci
Penulis (54)
Nathalie K. Jones
Jason J. Wang
Eric L. Nielsen
Robert J. De Rosa
Anne E. Peck
William Roberson
Jean-Baptiste Ruffio
Jerry W. Xuan
Bruce A. Macintosh
S. Mark Ammons
Vanessa P. Bailey
Travis S. Barman
Joanna Bulger
Eugene Chiang
Jeffrey K. Chilcote
Gaspard Duchêne
Thomas M. Esposito
Michael P. Fitzgerald
Katherine B. Follette
Stephen Goodsell
James R. Graham
Alexandra Z. Greenbaum
Pascale Hibon
Patrick Ingraham
Paul Kalas
Quinn M. Konopacky
Michael C. Liu
Franck Marchis
Jérôme Maire
Christian Marois
Brenda Matthews
Dimitri Mawet
Stanimir Metchev
Maxwell A. Millar-Blanchaer
Rebecca Oppenheimer
David W. Palmer
Jenny Patience
Marshall D. Perrin
Lisa Poyneer
Laurent Pueyo
Abhijith Rajan
Julien Rameau
Fredrik T. Rantakyrö
Bin Ren
Aniket Sanghi
Dmitry Savransky
Adam C. Schneider
Anand Sivaramakrishnan
Adam J. R. W. Smith
Inseok Song
Remi Soummer
Sandrine Thomas
Kimberly Ward-Duong
Schuyler G. Wolff
Akses Cepat
- Tahun Terbit
- 2025
- Sumber Database
- DOAJ
- DOI
- 10.3847/2041-8213/ae2007
- Akses
- Open Access ✓