Detection of the nearest Jupiter analogue in radial velocity and astrometry data

2019/10/14 by Fabo Feng, G. Anglada‐Escudé, Guillem Anglada-Escudé +9 · 74 citations
Physics and Astronomy · #Astro and Planetary Science #Astrometry #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Brown dwarf #Exoplanet #Gas giant #Jupiter (rocket family) #Jupiter mass #Orbit (dynamics) #Physics #Planet #Planetary mass #Planetary system #Proper motion #Radial velocity #Solar System #Space exploration #Stars #Stellar, planetary, and galactic studies #astro-ph.EP #astro-ph.SR

paper · pdf · doi:10.1093/mnras/stz2912

published in Monthly Notices of the Royal Astronomical Society 490(4), 5002-5016 (Oxford University Press) · 18 pages, 9 figures, 2 tables, accepted to be published in MNRAS. arXiv admin note: text overlap with arXiv:1803.08163

arxiv created 2019/10/14 · openalex publication_date 2019/10/17 · openalex created_date 2019/11/01 · arxiv updated 2019/11/06 · openalex updated_date 2026/08/05

Abstract

ABSTRACT The presence of Jupiter is crucial to the architecture of the Solar system and models underline this to be a generic feature of planetary systems. We find the detection of the difference between the position and motion recorded by the contemporary astrometric satellite Gaia and its precursor Hipparcos can be used to discover Jupiter-like planets. We illustrate how observations of the nearby star ϵ Indi A giving astrometric and radial velocity data can be used to independently find the orbit of its suspected companion. The radial velocity and astrometric data provide complementary detections which allow for a much stronger solution than either technique would provide individually. We quantify ϵ Indi A b as the closest Jupiter-like exoplanet with a mass of 3 MJup on a slightly eccentric orbit with an orbital period of 45 yr. While other long-period exoplanets have been discovered, ϵ Indi A b provides a well-constrained mass and along with the well-studied brown dwarf binary in orbit around ϵ Indi A means that the system provides a benchmark case for our understanding of the formation of gas giant planets and brown dwarfs.

Citations

• Imaging search for the unseen companion to ε Ind A - improving the detection limits with 4 μm observations
• The Hipparcos–Gaia Catalog of Accelerations
• Detection of the closest Jovian exoplanet in the Epsilon Indi triple system

Cited by

• A Second Visit to Eps Ind Ab with JWST: New Photometry Confirms Ammonia and Suggests Thick Clouds in the Exoplanet Atmosphere of the Closest Super-Jupiter
• Detection of four cold Jupiters through combined analyses of radial velocity and astrometry data
• Direct Detection of Known Exoplanets in Reflected Light: Predicting Sky Position with Literature Orbit Solutions
• Breaking the Mass Inclination Degeneracy of Radial Velocity Measurements via Monitoring von Zeipel-Lidov-Kozai Cycles: Implications in the HD 41004 System
• Astrometric Accelerations of Provisional Targets for the Habitable Worlds Observatory
• A celestial matryoshka: Dynamical and spectroscopic analysis of the Albireo system
• Orbital inclination and mass of the exoplanet candidate Proxima c
• High-contrast imaging at ten microns: A search for exoplanets around Eps Indi A, Eps Eri, Tau Ceti, Sirius A, and Sirius B
• A temperate super-Jupiter imaged with JWST in the mid-infrared. [europepmc]

Related

• Revised orbits of the two nearest Jupiters
• Detection of the closest Jovian exoplanet in the Epsilon Indi triple system
• Detection of four cold Jupiters through combined analyses of radial velocity and astrometry data
• Revised Mass and Orbit of ε Eridani b: A 1 Jupiter-Mass Planet on a Near-Circular Orbit
• HD 222237 b: a long period super-Jupiter around a nearby star revealed by radial-velocity and Hipparcos-Gaia astrometry