681 citations · 2.9k across the 33 of their papers we have counts for
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The SPOTS Models: A Grid of Theoretical Stellar Evolution Tracks and Isochrones For Testing The Effects of Starspots on Structure and Colors
Garrett Somers, Lyra Cao, Marc H. Pinsonneault
One-dimensional stellar evolution models have been successful at representing the structure and evolution of stars in diverse astrophysical contexts, but complications have been no…
Constraining Metallicity-dependent Mixing and Extra Mixing using [C/N] in Alpha-Rich Field Giants
Matthew Shetrone, Jamie Tayar, Jennifer A. Johnson +11
Internal mixing on the giant branch is an important process which affects the evolution of stars and the chemical evolution of the galaxy. While several mechanisms have been propos…
Radius Inflation at Low Rossby Number in the Hyades Cluster
Karl Jaehnig, Garrett Somers, Keivan Stassun
Radius inflation continues to be explored as a peculiar occurrence among magnetically active, low-mass stars. Recently Somers et. al. 2017 showed that radius inflation among low-ma…
The K2 M67 Study: A Curiously Young Star in an Eclipsing Binary in an Old Open Cluster
Eric L. Sandquist, Robert D. Mathieu, Samuel N. Quinn +16
We present an analysis of a slightly eccentric (), partially eclipsing long-period ( d) main sequence binary system (WOCS 12009, Sanders 1247) in the benchmark o…
Variability Properties of 4 Million Sources in the Input Catalog Observed with the Kilodegree Extremely Little Telescope Survey
Ryan J. Oelkers, Joseph E. Rodriguez, Keivan G. Stassun +10
The Kilodegree Extremely Little Telescope (KELT) has been surveying more than of the celestial sphere for nearly a decade. While the primary science goal of the survey is th…
IN-SYNC. VII. Evidence for a decreasing spectroscopic binary fraction from 1 to 100 Myr within the IN-SYNC sample
Karl Jaehnig, Jonathan C. Bird, Keivan G. Stassun +4
We study the occurrence of spectroscopic binaries in young star-forming regions using the INfrared Spectroscopy of Young Nebulous Clusters(IN-SYNC) survey, carried out in SDSS-III…
M Dwarf rotation from the young clusters to the field. I. A Mass-Rotation Correlation at 10 Myr
Garrett Somers, John Stauffer, Luisa Rebull +2
Recent observations of the low-mass rotation distributions of the Pleiades and Praesepe clusters have revealed a ubiquitous correlation between mass and rotation, such that late M…
A Catalog of Stellar Unified Properties (CATSUP) for 951 FGK-Stars Within 30 pc
Natalie R. Hinkel, Eric E. Mamajek, Margaret C. Turnbull +6
Almost every star in our Galaxy is likely to harbor a terrestrial planet, but accurate measurements of an exoplanet's mass and radius demands accurate knowledge of the properties o…
Identification of Young Stellar Variables with KELT for K2 II: The Upper Scorpius Association
Megan Ansdell, Ryan J. Oelkers, Joseph E. Rodriguez +13
High-precision photometry from space-based missions such as K2 and TESS enables detailed studies of young star variability. However, because space-based observing campaigns are oft…
Evidence for Binarity and Possible Disk Obscuration in Kepler Observations of the Pulsating RV Tau Variable DF Cygni
Laura D. Vega, Keivan G. Stassun, Rodolfo Montez +2
The Kepler light curve of DF Cyg is unparalleled in precision and cadence for any RV Tau star to date spanning a baseline of 4 years and clearly displaying the signature puls…
The Correlation Between Mixing Length and Metallicity on the Giant Branch: Implications for Ages in the Gaia Era
Jamie Tayar, Garrett Somers, Marc H. Pinsonneault +28
In the updated APOGEE-Kepler catalog, we have asteroseismic and spectroscopic data for over 3000 first ascent red giants. Given the size and accuracy of this sample, these data off…
Identification of Young Stellar Variables with KELT for K2 I: Campaign 13 Taurus Dippers and Rotators
Joseph E. Rodriguez, Megan Ansdell, Ryan J. Oelkers +13
One of the most well-studied young stellar associations, Taurus-Auriga, will be observed by the extended Kepler mission, K2, in the spring of 2017. K2 Campaign 13 (C13) will be a u…
Placing the spotted T Tauri star LkCa 4 on an HR diagram
Michael A. Gully-Santiago, Gregory J. Herczeg, Ian Czekala +12
Ages and masses of young stars are often estimated by comparing their luminosities and effective temperatures to pre-main sequence stellar evolution tracks, but magnetic fields and…
A Measurement of Radius Inflation in the Pleiades and its Relation to Rotation and Lithium Depletion
Garrett Somers, Keivan G. Stassun
Precise measurements of eclipsing binary parameters and statistical studies of young clusters have suggested that some magnetically active low-mass dwarfs possess radii inflated by…
Boron Abundances Across the "Li-Be Dip" in the Hyades
Ann Merchant Boesgaard, Michael G. Lum. Constantine P. Deliyannis, Jeremy R. King +2
Dramatic deficiencies of Li in the mid-F dwarf stars of the Hyades cluster were discovered by Boesgaard & Tripicco. Boesgaard & King discovered corresponding, but smaller, deficien…
Rotation in the Pleiades With K2: III. Speculations on Origins and Evolution
J. R. Stauffer, L. M. Rebull, J. Bouvier +15
We use high quality K2 light curves for hundreds of stars in the Pleiades to understand better the angular momentum evolution and magnetic dynamos of young, low mass stars. The K2…
Rotation in the Pleiades with K2: II. Multi-Period Stars
L. M. Rebull, J. R. Stauffer, J. Bouvier +15
We use K2 to continue the exploration of the distribution of rotation periods in Pleiades that we began in Paper I. We have discovered complicated multi-period behavior in Pleiades…
Rotation in the Pleiades with K2: I. Data and First Results
L. M. Rebull, J. R. Stauffer, J. Bouvier +16
Young (125 Myr), populous (1000 members), and relatively nearby, the Pleiades has provided an anchor for stellar angular momentum models for both younger and older stars. We use…
Lithium depletion is a strong test of core-envelope recoupling
Garrett Somers, Marc H. Pinsonneault
Rotational mixing is a prime candidate for explaining the gradual depletion of lithium from the photospheres of cool stars during the main sequence. However, previous mixing calcul…
The Impact of Starspots on Mass and Age Estimates During The Pre-Main Sequence
Garrett Somers, Marc H. Pinsonneault
We investigate the impact of starspots on the evolution of late-type stars during the pre-main sequence (pre-MS). We find that heavy spot coverage increases the radii of stars by 4…
Older and Colder: The impact of starspots on pre-main sequence stellar evolution
Garrett Somers, Marc H. Pinsonneault
We assess the impact of starspots on the evolution of late-type stars during the pre-main sequence (pre-MS) using a modified stellar evolution code. We find that heavily spotted mo…
Rotation, inflation, and lithium in the Pleiades
Garrett Somers, Marc H. Pinsonneault
The rapidly rotating cool dwarfs of the Pleiades are rich in lithium relative to their slowly rotating counterparts. Motivated by observations of inflated radii in young, active st…
A Tale of Two Anomalies: Depletion, Dispersion, and the Connection Between the Stellar Lithium Spread and Inflated Radii on the Pre-Main Sequence
Garrett Somers, Marc Pinsonneault
We investigate lithium depletion in standard stellar models (SSMs) and main sequence (MS) open clusters, and explore the origin of the Li dispersion in young, cool stars of equal m…