98 citations · 336 across the 11 of their papers we have counts for
11 papers
On Convective Turnover Times and Dynamos In Low-Mass Stars
Seth Gossage, Rocio Kiman, Kristina Monsch +7
The relationship between magnetic activity and Rossby number is one way through which stellar dynamos can be understood. Using measured rotation rates and X-ray to bolometric lumin…
Detecting stellar flares in photometric data using hidden Markov models
J. Arturo Esquivel, Yunyi Shen, Vianey Leos-Barajas +5
We present a hidden Markov model (HMM) for discovering stellar flares in light curve data of stars. HMMs provide a framework to model time series data that are not stationary; they…
Active Stars in the Spectroscopic Survey of Mid-to-Late M Dwarfs Within 15pc
Emily K Pass, Jennifer G Winters, David Charbonneau +2
We present results from the volume-complete spectroscopic survey of 0.1-0.3M M dwarfs within 15pc. This work discusses the active sample without close binary companions, pr…
Galactic Kinematics and Observed Flare Rates of a Volume-Complete Sample of Mid-to-Late M-dwarfs: Constraints on the History of the Stellar Radiation Environment of Planets Orbiting Low-mass Stars
Amber A. Medina, Jennifer G. Winters, Jonathan M. Irwin +1
We present a study of the relationship between galactic kinematics, flare rates, chromospheric activity, and rotation periods for a volume-complete, nearly all-sky sample of 219 si…
Variability Timescales of H on Active Mid-to-Late M dwarfs
Amber A. Medina, David Charbonneau, Jennifer G. Winters +2
We present a study of the variation timescales of the chromospheric activity indicator H on a sample of 13 fully-convective, active mid-to-late M stars with masses between 0.1--…
TOI-712: a system of adolescent mini-Neptunes extending to the habitable zone
Sydney Vach, Samuel N. Quinn, Andrew Vanderburg +40
As an all-sky survey, NASA's mission is able to detect the brightest and rarest types of transiting planetary systems, including young planets that enable study of the evolu…
A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds
J. G. Winters, R. Cloutier, A. A. Medina +79
LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 parsecs. The primary star LTT 1445A (0.257 M_Sun) is known to host the transiting planet LTT 144…
Flare Rates, Rotation Periods. and Spectroscopic Activity Indicators of a Volume-Complete Sample of Mid-to-Late M dwarfs within 15 Parsecs
Amber A. Medina, Jennifer G. Winters, Jonathan M. Irwin +1
We present a study of flare rates, rotation periods, and spectroscopic activity indicators of 125 single stars within 15 parsecs and with masses between 0.10.3 observe…
Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M Dwarf System at 6.9 Parsecs
Jennifer G. Winters, Amber A. Medina, Jonathan M. Irwin +40
We present the discovery from TESS data of LTT 1445Ab. At a distance of 6.9 parsecs, it is the second nearest transiting exoplanet system found to date, and the closest one known f…
Techniques for Finding Close-in, Low-mass Planets around Subgiants
Amber A. Medina, John A. Johnson, Jason D. Eastman +1
Jupiter-mass planets with large semi-major axes ( AU) occur at a higher rate around evolved intermediate mass stars. There is a pronounced paucity of close-in ( A…
Ionization Modeling Astrophysical Gaseous Structures. I. The Optically Thin Regime
Christopher W. Churchill, Elizabeth Klimek, Amber Medina +1
We present a code for modelling the ionization conditions of optically thin astrophysical gas structures. Given the gas hydrogen density, equilibrium temperature, elemental abundan…