The field substellar mass function based on the full-sky 20 pc census of 525 L, T, and Y dwarfs

JD Kirkpatrick, CR Gelino, JK Faherty… - The Astrophysical …, 2021 - iopscience.iop.org
We present final Spitzer trigonometric parallaxes for 361 L, T, and Y dwarfs. We combine
these with prior studies to build a list of 525 known L, T, and Y dwarfs within 20 pc of the …

A Volume-limited Sample of Ultracool Dwarfs. I. Construction, Space Density, and a Gap in the L/T Transition

WMJ Best, MC Liu, EA Magnier… - The Astronomical …, 2020 - iopscience.iop.org
We present a new volume-limited sample of L0–T8 dwarfs out to 25 pc defined entirely by
parallaxes, using our recent measurements from UKIRT/WFCAM along with Gaia DR2 and …

Preliminary trigonometric parallaxes of 184 late-T and Y dwarfs and an analysis of the field substellar mass function into the “planetary” mass regime

JD Kirkpatrick, EC Martin, RL Smart… - The Astrophysical …, 2019 - iopscience.iop.org
We present preliminary trigonometric parallaxes of 184 late-T and Y dwarfs using
observations from Spitzer (143), the US Naval Observatory (18), the New Technology …

Rotation Periods, Inclinations, and Obliquities of Cool Stars Hosting Directly Imaged Substellar Companions: Spin–Orbit Misalignments Are Common

BP Bowler, QH Tran, Z Zhang, M Morgan… - The Astronomical …, 2023 - iopscience.iop.org
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 …

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 …

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 …

Photometry and proper motions of M, L, and T dwarfs from the pan-STARRS1 3π survey

WMJ Best, EA Magnier, MC Liu, KM Aller… - The Astrophysical …, 2017 - iopscience.iop.org
We present a catalog of 9888 M, L and T dwarfs detected in the Pan-STARRS1 3π Survey
(PS1), covering three-quarters of the sky. Our catalog contains nearly all known objects of …

76 T dwarfs from the UKIDSS LAS: benchmarks, kinematics and an updated space density

B Burningham, CV Cardoso, L Smith… - Monthly Notices of …, 2013 - academic.oup.com
We report the discovery of 76 new T dwarfs from the UKIRT Infrared Deep Sky Survey
(UKIDSS) Large Area Survey (LAS). Near-infrared broad-and narrow-band photometry and …

The AllWISE Motion Survey, Part 2

JD Kirkpatrick, K Kellogg, AC Schneider… - The Astrophysical …, 2016 - iopscience.iop.org
ABSTRACT We use the AllWISE Data Release to continue our search for Wide-field Infrared
Survey Explorer (WISE)-detected motions. In this paper, we publish another 27,846 motion …

Predicting Cloud Conditions in Substellar Mass Objects Using Ultracool Dwarf Companions

E Calamari, JK Faherty, C Visscher… - The Astrophysical …, 2024 - iopscience.iop.org
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 …