The origin and evolution of multiple star systems

SSR Offner, M Moe, KM Kratter, SI Sadavoy… - arxiv preprint arxiv …, 2022 - arxiv.org
Observational advances over the last decade have enabled high-resolution, interferometric
studies of forming multiple systems, statistical surveys of multiplicity in star-forming regions …

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 …

The Hawaii Infrared Parallax Program. VI. The fundamental properties of 1000+ ultracool dwarfs and planetary-mass objects using optical to mid-infrared spectral …

A Sanghi, MC Liu, WMJ Best, TJ Dupuy… - The Astrophysical …, 2023 - iopscience.iop.org
We derive the bolometric luminosities (L bol) of 865 field-age and 189 young ultracool
dwarfs (spectral types M6–T9, including 40 new discoveries presented here) by directly …

Detecting exomoons from radial velocity measurements of self-luminous planets: application to observations of HR 7672 B and future prospects

JB Ruffio, K Horstman, D Mawet… - The Astronomical …, 2023 - iopscience.iop.org
The detection of satellites around extrasolar planets, so called exomoons, remains a largely
unexplored territory. In this work, we study the potential of detecting these elusive objects …

UNCOVER: JWST spectroscopy of three cold brown dwarfs at kiloparsec-scale distances

AJ Burgasser, R Bezanson, I Labbe… - The Astrophysical …, 2024 - iopscience.iop.org
We report JWST/NIRSpec spectra of three distant T-type brown dwarfs identified in the
Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization …

Assessing the C/O Ratio Formation Diagnostic: A Potential Trend with Companion Mass

KKW Hoch, QM Konopacky, CA Theissen… - The Astronomical …, 2023 - iopscience.iop.org
The carbon-to-oxygen (C/O) ratio in an exoplanet atmosphere has been suggested as a
potential diagnostic of planet formation. Now that a number of exoplanets have measured …

[HTML][HTML] Are These Planets or Brown Dwarfs? Broadly Solar Compositions from High-resolution Atmospheric Retrievals of∼ 10–30 M Jup Companions

JW Xuan, CC Hsu, L Finnerty, J Wang… - The Astrophysical …, 2024 - iopscience.iop.org
Abstract Using Keck Planet Imager and Characterizer high-resolution (R∼ 35,000)
spectroscopy from 2.29 to 2.49 μm, we present uniform atmospheric retrievals for eight …

Astrometry and photometry for≈ 1000 L, T, and Y dwarfs from the UKIRT Hemisphere Survey

AC Schneider, JA Munn, FJ Vrba… - The Astronomical …, 2023 - iopscience.iop.org
We present the positions, proper motions, and near-infrared photometry for 966 known
objects with spectral types later than M that were observed as part of the the UKIRT …

A volume-limited sample of ultracool dwarfs. II. The substellar age and mass functions in the solar neighborhood

WMJ Best, A Sanghi, MC Liu, EA Magnier… - The Astrophysical …, 2024 - iopscience.iop.org
We present the most precise constraints to date for the mass and age distributions of single
ultracool dwarfs in the solar neighborhood, based on an updated volume-limited sample of …

[HTML][HTML] Rotation and Abundances of the Benchmark Brown Dwarf HD 33632 Ab from Keck/KPIC High-resolution Spectroscopy

CC Hsu, JJ Wang, JW Xuan, JB Ruffio… - The Astrophysical …, 2024 - iopscience.iop.org
We present the projected rotational velocity and molecular abundances for HD 33632 Ab
obtained via Keck Planet Imager and Characterizer (KPIC) high-resolution spectroscopy. HD …