171 citations · 798 across the 29 of their papers we have counts for
25 papers · 1 filter
Diversity of Cold Worlds: Predicted Near- to Mid-infrared Spectral Signatures of a Cold Brown Dwarf with Potential Auroral Heating
Genaro Suárez, Jacqueline K. Faherty, Ben Burningham +12
Recent JWST/NIRSpec observations have revealed strong methane emission at 3.326 microns in the 482 K brown dwarf CWISEP J193518.59154620.3 (W1935). Atmospheric modeling…
Diversity of Cold Worlds: A Near Complete Spectral Energy Distribution for 2MASS J04151954-0935066 using JWST
Sherelyn Alejandro Merchan, Jacqueline K. Faherty, Genaro Suárez +25
We present the a near complete spectral energy distribution (SED) for an extrasolar world: the T8 brown dwarf 2MASS~J041519540935066. Spanning from optical to mid-infrared (0.7-…
The Diversity of Cold Worlds: a blended-light binary straddling the T/Y transition in brown dwarfs
Daniella C. Bardalez Gagliuffi, Jacqueline K. Faherty, Genaro Suarez +22
We present the first brown dwarf spectral binary characterized with JWST: WISE J014656.66+423410.0, the coldest blended-light brown dwarf binary straddling the T/Y transition. We o…
Accurate and Model Independent Radius Determination of Single FGK and M Dwarfs Using Gaia DR3 Data
Rocio Kiman, Timothy D. Brandt, Jacqueline K. Faherty +1
Measuring fundamental stellar parameters is key to fully comprehending the evolution of stars. However, current theoretical models over-predict effective temperatures, and under-pr…
Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE
Federico Marocco, J. Davy Kirkpatrick, Adam C. Schneider +31
We present the discovery of 13 new widely separated T dwarf companions to M dwarf primaries, identified using WISE/NEOWISE data by the CatWISE and Backyard Worlds: Planet 9 project…
Methane Emission From a Cool Brown Dwarf
Jacqueline K. Faherty, Ben Burningham, Jonathan Gagné +21
Beyond our solar system, aurorae have been inferred from radio observations of isolated brown dwarfs (e.g. Hallinan et al. 2006; Kao et al. 2023). Within our solar system, giant pl…
High-Precision Atmospheric Constraints for a Cool T Dwarf from JWST Spectroscopy
Callie E. Hood, Sagnick Mukherjee, Jonathan J. Fortney +12
We present observations of the T8 dwarf 2MASS 0415-0935 with JWST's NIRSpec spectrograph using the G395H grating ( 2.87 - 5.14 m). We perform the first atmospheric retriev…
The Initial Mass Function Based on the Full-sky 20-pc Census of 3,600 Stars and Brown Dwarfs
J. Davy Kirkpatrick, Federico Marocco, Christopher R. Gelino +85
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 trigo…
Dynamical Masses and Ages of Sirius-like Systems
Hengyue Zhang, Timothy D. Brandt, Rocio Kiman +4
We measure precise orbits and dynamical masses and derive age constraints for six confirmed and one candidate Sirius-like systems, including the Hyades member HD 27483. Our orbital…
Surveying Nearby Brown Dwarfs with HGCA: Direct Imaging Discovery of a Faint, High-Mass Brown Dwarf Orbiting HD 176535 A
Yiting Li, Timothy D. Brandt, G. Mirek Brandt +16
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 dir…
Examining the Rotation Period Distribution of the 40 Myr Tucana-Horologium Association with TESS
Mark Popinchalk, Jacqueline K. Faherty, Jason L. Curtis +6
The Tucana-Horologium Association (Tuc-Hor) is a 40 Myr old moving group in the southern sky. In this work, we measure the rotation periods of 313 Tuc-Hor objects with TESS light c…
The Oceanus Moving Group: A New 500 Myr-Old Host for the Nearest Brown Dwarf
Jonathan Gagné, Leslie Moranta, Jacqueline K. Faherty +5
We report the discovery of the Oceanus moving group, a 500 Myr-old group with 50 members and candidate members at distances 2-50 pc from the Sun using an unsupervised clu…
wdwarfdate: A Python Package to Derive Bayesian Ages of White Dwarfs
Rocio Kiman, Siyi Xu, Jacqueline K. Faherty +5
White dwarfs have been successfully used as cosmochronometers in the literature, however their reach has been limited in comparison to their potential. We present wdwarfdate, a pub…
The POKEMON Speckle Survey of Nearby M Dwarfs. I. New Discoveries
Catherine A. Clark, Gerard T. van Belle, Elliott P. Horch +4
M dwarfs are favorable targets for exoplanet detection with current instrumentation, but stellar companions can induce false positives and inhibit planet characterization. Knowledg…
Discovery of 34 low-mass comoving systems using NOIRLab Source Catalog DR2
Frank Kiwy, Jacqueline K. Faherty, Aaron Meisner +14
We present the discovery of 34 comoving systems containing an ultra-cool dwarf found by means of the NOIRLab Source Catalog (NSC) DR2. NSC's angular resolution of 1" allows f…
Discovery of a low-mass comoving system using NOIRLab Source Catalog DR2
Frank Kiwy, Jacqueline Faherty, Aaron Meisner +6
We present the discovery of a low-mass comoving system found by means of the NOIRLab Source Catalog (NSC) DR2. The system consists of the high proper-motion star LEHPM 5005 and an…
Evaluating Rotation Periods of M Dwarfs Across the Ages
Mark Popinchalk, Jacqueline K. Faherty, Rocio Kiman +5
In this work we examine M dwarf rotation rates at a range of ages to establish benchmarks for Mdwarf gyrochronology. This work includes a sample of 713 spectroscopically-classified…
Calibration of the Halpha Age-Activity relation for M dwarfs
Rocio Kiman, Jacqueline K. Faherty, Kelle L. Cruz +6
In this work, we calibrate the relationship between Halpha emission and M dwarf ages. We compile a sample of 892 M dwarfs with Halpha equivalent width (HaEW) measurements from the…
Gyro-Kinematic Ages for around 30,000 Kepler Stars
Yuxi, Lu, Ruth Angus +3
Estimating stellar ages is important for advancing our understanding of stellar and exoplanet evolution and investigating the history of the Milky Way. However, ages for low-mass s…
The Field Substellar Mass Function Based on the Full-sky 20-pc Census of 525 L, T, and Y Dwarfs
J. Davy Kirkpatrick, Christopher R. Gelino, Jacqueline K. Faherty +49
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 th…
Spitzer Follow-up of Extremely Cold Brown Dwarfs Discovered by the Backyard Worlds: Planet 9 Citizen Science Project
Aaron M. Meisner, Jacqueline K. Faherty, J. Davy Kirkpatrick +40
We present Spitzer follow-up imaging of 95 candidate extremely cold brown dwarfs discovered by the Backyard Worlds: Planet 9 citizen science project, which uses visually perceived…
Discovery of a Nearby Young Brown Dwarf Disk
M. C. Schutte, K. D. Lawson, J. P. Wisniewski +15
We report the discovery of the youngest brown dwarf with a disk at 102 pc from the Sun, WISEA~J120037.79-784508.3 (W1200-7845), via the Disk Detective citizen science project. We e…
Exploring the evolution of stellar rotation using Galactic kinematics
Ruth Angus, Angus Beane, Adrian M. Price-Whelan +9
The rotational evolution of cool dwarfs is poorly constrained after around 1-2 Gyr due to a lack of precise ages and rotation periods for old main-sequence stars. In this work we u…
Towards precise stellar ages: combining isochrone fitting with empirical gyrochronology
Ruth Angus, Timothy D. Morton, Daniel Foreman-Mackey +7
We present a new age-dating technique that combines gyrochronology with isochrone fitting to infer ages for FGKM main-sequence and subgiant field stars. Gyrochronology and isochron…