Stellar and substellar companions from Gaia EDR3-Proper-motion anomaly and resolved common proper-motion pairs
Context. The multiplicity fraction of stars, down to the substellar regime, is a parameter of
fundamental importance for stellar formation, evolution, and planetology. The census of …
fundamental importance for stellar formation, evolution, and planetology. The census of …
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
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 …
Rotation Periods, Inclinations, and Obliquities of Cool Stars Hosting Directly Imaged Substellar Companions: Spin–Orbit Misalignments Are Common
The orientation between a star's spin axis and a planet's orbital plane provides valuable
information about the system's formation and dynamical history. For non-transiting planets at …
information about the system's formation and dynamical history. For non-transiting planets at …
The Initial Mass Function Based on the Full-sky 20 pc Census of∼ 3600 Stars and Brown Dwarfs
JD Kirkpatrick, F Marocco, CR Gelino… - The Astrophysical …, 2024 - iopscience.iop.org
A complete accounting of nearby objects—from the highest-mass white dwarf progenitors
down to low-mass brown dwarfs—is now possible, thanks to an almost complete set of …
down to low-mass brown dwarfs—is now possible, thanks to an almost complete set of …
[HTML][HTML] Barium and related stars, and their white-dwarf companions-III. The masses of the white dwarfs
Context. Masses are one of the most difficult stellar properties to measure. In the case of the
white-dwarf (WD) companions of Barium (Ba) stars, the situation is worse. These stars are …
white-dwarf (WD) companions of Barium (Ba) stars, the situation is worse. These stars are …
Impact of a new H/He equation of state on the evolution of massive brown dwarfs-New determination of the hydrogen burning limit
We explored the impact of the latest equation of state (EOS) for dense hydrogen–helium
mixtures, which takes into account the interactions between hydrogen and helium species …
mixtures, which takes into account the interactions between hydrogen and helium species …
The cool brown dwarf Gliese 229 B is a close binary
Owing to their similarities with giant exoplanets, brown dwarf companions of stars provide
insights into the fundamental processes of planet formation and evolution. From their orbits …
insights into the fundamental processes of planet formation and evolution. From their orbits …
An atmospheric retrieval of the brown dwarf Gliese 229B
We present results from an atmospheric retrieval analysis of Gl 229B using the Brewster
retrieval code. We find the best fit model to be cloud-free, consistent with the T dwarf retrieval …
retrieval code. We find the best fit model to be cloud-free, consistent with the T dwarf retrieval …