521 citations · 3.8k across the 57 of their papers we have counts for
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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…
Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-Cool Dwarfs
Megan E. Tannock, Stanimir Metchev, Aren Heinze +7
We present the discovery of rapid photometric variability in three ultra-cool dwarfs from long-duration monitoring with the Spitzer Space Telescope. The T7, L3.5, and L8 dwarfs hav…
The Tau Association: A 60 Myr-Old Coeval Group at 150 pc from the Sun
Jonathan Gagné, Trevor J. David, Eric E. Mamajek +3
[Abbreviated] We present an analysis of the newly identified Tau Association (MUTA) of young stars at 150 pc from the Sun that is part of the large Cas-Tau structure, co…
The Low-Mass Members of the Ursa Major Association
Jonathan Gagné, Jacqueline K. Faherty, Mark Popinchalk
We present a set of 5 over-densities in spatial-kinematic space previously identified by Kounkel & Covey (2019) that may constitute extended tidal tails associated with the nearby,…
The ASAS-SN Catalog of Variable Stars VIII: "Dipper" Stars in the Lupus Star-Forming Region
J. W. Bredall, B. J. Shappee, E. Gaidos +9
Some young stellar objects such as T Tauri-like "dipper" stars vary due to transient partial occultation by circumstellar dust, and observations of this phenomenon inform us of con…
WISEA J083011.95+283716.0: A Missing Link Planetary-Mass Object
Daniella C. Bardalez Gagliuffi, Jacqueline K. Faherty, Adam C. Schneider +16
We present the discovery of WISEA J083011.95+283716.0, the first Y dwarf candidate identified through the Backyard Worlds: Planet 9 citizen science project. We identified this obje…
LRP2020: The Opportunity of Young Nearby Associations with the Advent of the Gaia Mission
Jonathan Gagné, Joel Kastner, Semyeong Oh +12
This white paper proposes leveraging high-quality Gaia data available to the worldwide scientific community and complement it with support from Canadian-related facilities to place…
A Reanalysis of the Fundamental Parameters and Age of TRAPPIST-1
Eileen C. Gonzales, Jacqueline K. Faherty, Jonathan Gagné +3
We present the distance-calibrated spectral energy distribution (SED) of TRAPPIST-1 using a new medium resolution (R~6000) near-infrared FIRE spectrum and its Gaia parallax. We rep…
Brown Dwarfs and Directly Imaged Exoplanets in Young Associations
Jacqueline K. Faherty, Katelyn Allers, Daniella Bardalez Gagliuffi +7
In order to understand the atmospheres as well as the formation mechanism of giant planets formed outside our solar system, the next decade will require an investment in studies of…
Astro2020 White Paper: The L/T Transition
Johanna M. Vos, Katelyn Allers, Daniel Apai +10
The L/T transition is an important evolutionary phase in brown dwarf atmospheres, providing us with a unique opportunity to explore the effects of clouds, convection, winds, gravit…
The Early Evolution of Stars and Exoplanet Systems: Exploring and Exploiting Nearby, Young Stars (an Astro2020 Science White Paper)
Joel H. Kastner, Katelyn Allers, Brendan Bowler +12
Our knowledge of the population of young (age <=750 Myr) stars that lie within ~120 pc of the Sun is rapidly accelerating. The vast majority of these nearby, young stars can be pla…
Volans-Carina: A New 90 Myr Old Stellar Association at 85 pc
Jonathan Gagné, Jacqueline K. Faherty, Eric E. Mamajek
We present a characterization of the new Volans-Carina Association (VCA) of stars near the Galactic plane (b ~ -10 deg) at a distance of ~75-100 pc, previously identified as group…
Understanding Fundamental Properties and Atmospheric Features of Subdwarfs via a Case Study of SDSS J125637.13-022452.4
Eileen C. Gonzales, Jacqueline K. Faherty, Jonathan Gagné +2
We present the distance-calibrated spectral energy distribution (SED) of the sdL3.5 subdwarf SDSS J125637.13-022452.4 (J1256-0224) using its Gaia parallax and its resultant bolomet…
A Young Ultramassive White Dwarf in the AB Doradus Moving Group
Jonathan Gagné, Gilles Fontaine, Amélie Simon +1
We use Gaia DR2 kinematic data and white dwarf evolutionary models to determine that the young and ultramassive white dwarf GD 50 is a likely member of the AB Doradus moving group.…
BANYAN. XIII. A First Look at Nearby Young Associations with Gaia Data Release 2
Jonathan Gagné, Jacqueline K. Faherty
In this paper we examine the nearest 100 pc entries in the data release 2 of Gaia to identify previously unrecognized candidate members in young associations. We analyze 695 952 st…
A Gaia DR2 Confirmation that 2MASS J12074836-3900043 is a Member of the TW Hya Association
Jonathan Gagné, Eileen C. Gonzales, Jacqueline K. Faherty
We use new data from Gaia DR2 to confirm that the young L1 candidate member of the TW Hya association (TWA) is now a bona fide member with a model-dependent mass estimate of ~1…
A Pre-Gaia DR2 Survey for Nearby M Dwarfs in Young Associations
Jonathan Gagné, Jacqueline K. Faherty, Gilles Fontaine
In this research note we identify 130 new M-type candidate members of young associations with the BANYAN tool and recently published trigonometric distances from RECONS and URA…
BANYAN. XII. New Members of Nearby Young Associations from Gaia-Tycho Data
Jonathan Gagné, Olivier Roy-Loubier, Jacqueline K. Faherty +2
We present a search for stellar members of young associations within 150 pc of the Sun based on Gaia-Tycho and an updated version of the BANYAN software to determine Bayesian m…
Fundamental Properties of Co-Moving Stars observed by
John J. Bochanski, Jacqueline K. Faherty, Jonathan Gagné +5
We have estimated fundamental parameters for a sample of co-moving stars observed by and identified by Oh et al. (2017). We matched the observations to the 2MASS and…
BANYAN. XI. The BANYAN multivariate Bayesian algorithm to identify members of young associations within 150 pc
Jonathan Gagné, Eric E. Mamajek, Lison Malo +8
BANYAN is a new Bayesian algorithm to identify members of young stellar associations within 150 pc of the Sun. It includes 27 young associations with ages in the range ~1-800 M…
2MASS J13243553+6358281 is an Early T-Type Planetary-Mass Object in the AB Doradus Moving Group
Jonathan Gagné, Katelyn N. Allers, Christopher A. Theissen +3
We present new radial velocity and trigonometric parallax measurements indicating that the unusually red and photometrically variable T2 dwarf 2MASS J13243553+6358281 is a member o…
2MASS J11151597+1937266: A Young, Dusty, Isolated, Planetary-Mass Object with a Potential Wide Stellar Companion
Christopher A. Theissen, Adam J. Burgasser, Daniella C. Bardalez Gagliuffi +4
We present 2MASS J11151597+1937266, a recently identified low-surface gravity L dwarf, classified as an L2 based on Sloan Digital Sky Survey optical spectroscopy. We confirm thi…
BANYAN. X. Discovery of a wide, low-gravity L-type companion to a fast-rotating M3 dwarf
Marie-Eve Desrochers, Etienne Artigau, Jonathan Gagné +4
We report the discovery of a substellar-mass co-moving companion to 2MASS J22501512+2325342, an M3 candidate member of the young (130--200 Myr) AB Doradus Moving Group (ABDMG). Thi…