3D selection of 167 substellar companions to nearby stars
We analyze 5108 AFGKM stars with at least five high-precision radial velocity points, as well
as Gaia and Hipparcos astrometric data, utilizing a novel pipeline developed in previous …
as Gaia and Hipparcos astrometric data, utilizing a novel pipeline developed in previous …
Direct imaging and astrometric detection of a gas giant planet orbiting an accelerating star
T Currie, GM Brandt, TD Brandt, B Lacy, A Burrows… - Science, 2023 - science.org
Direct imaging of gas giant exoplanets provides information on their atmospheres and the
architectures of planetary systems. However, few planets have been detected in blind …
architectures of planetary systems. However, few planets have been detected in blind …
Astrometric accelerations as dynamical beacons: discovery and characterization of HIP 21152 B, the first T-dwarf companion in the Hyades
K Franson, BP Bowler, M Bonavita… - The Astronomical …, 2023 - iopscience.iop.org
Benchmark brown dwarf companions with well-determined ages and model-independent
masses are powerful tools to test substellar evolutionary models and probe the formation of …
masses are powerful tools to test substellar evolutionary models and probe the formation of …
Improved Dynamical Masses for Six Brown Dwarf Companions Using Hipparcos and Gaia EDR3
We present comprehensive orbital analyses and dynamical masses for the substellar
companions Gl 229 B, Gl 758 B, HD 13724 B, HD 19467 B, HD 33632 Ab, and HD 72946 B …
companions Gl 229 B, Gl 758 B, HD 13724 B, HD 19467 B, HD 33632 Ab, and HD 72946 B …
Retrieving the C and O abundances of HR 7672 AB: a solar-type primary star with a benchmark brown dwarf
A benchmark brown dwarf (BD) is a BD whose properties (eg, mass and chemical
composition) are precisely and independently measured. Benchmark BDs are valuable in …
composition) are precisely and independently measured. Benchmark BDs are valuable in …
Precise dynamical masses of new directly imaged companions from combining relative astrometry, radial velocities, and HIPPARCOS-Gaia eDR3 accelerations
EL Rickman, E Matthews, W Ceva… - Astronomy & …, 2022 - aanda.org
Aims. With an observing time span of more than 20 yr, the CORALIE radial-velocity survey is
able to detect long-term trends in data corresponding to companions with masses and …
able to detect long-term trends in data corresponding to companions with masses and …
VLTI/GRAVITY Observations and Characterization of the Brown Dwarf Companion HD 72946 B
Tension remains between the observed and modeled properties of substellar objects, but
objects in binary orbits, with known dynamical masses, can provide a way forward. HD …
objects in binary orbits, with known dynamical masses, can provide a way forward. HD …
Predicting Cloud Conditions in Substellar Mass Objects Using Ultracool Dwarf Companions
We present results from conducting a theoretical chemical analysis of a sample of
benchmark companion brown dwarfs whose primary star is of type F, G, or K. We summarize …
benchmark companion brown dwarfs whose primary star is of type F, G, or K. We summarize …
The Carbon-to-oxygen Ratio in Cool Brown Dwarfs and Giant Exoplanets. I. The Benchmark Late-T Dwarfs GJ 570D, HD 3651B, and Ross 458C
Measurements of the C/O ratio in brown dwarfs are lacking, in part due to past models
adopting solar C/O only. We have expanded the ATMO 2020 atmosphere model grid to …
adopting solar C/O only. We have expanded the ATMO 2020 atmosphere model grid to …
Surveying nearby brown dwarfs with HGCA: direct imaging discovery of a faint, high-mass brown dwarf orbiting HD 176535 A
Brown dwarfs with well-measured masses, ages, and luminosities provide direct benchmark
tests of substellar formation and evolutionary models. We report the first results from a direct …
tests of substellar formation and evolutionary models. We report the first results from a direct …