583 citations · 4.2k across the 54 of their papers we have counts for
11 papers · 1 filter
A Compact, Coherent Representation of Stellar Surface Variation in the Spectral Domain
Lily L. Zhao, Megan E. Bedell, David W. Hogg +1
Time-varying inhomogeneities on stellar surfaces constitute one of the largest sources of radial velocity (RV) error for planet detection and characterization. We show that stellar…
Flaring Latitudes in Ensembles of Low Mass Stars
Ekaterina Ilin, Ruth Angus, Rodrigo Luger +2
The distribution of small-scale magnetic fields in stellar photospheres is an important ingredient in our understanding of the magnetism of low mass stars. Their spatial distributi…
Mapping stellar surfaces III: An Efficient, Scalable, and Open-Source Doppler Imaging Model
Rodrigo Luger, Megan Bedell, Daniel Foreman-Mackey +3
The study of stellar surfaces can reveal information about the chemical composition, interior structure, and magnetic properties of stars. It is also critical to the detection and…
The K2 Galactic Archaeology Program Data Release 3: Age-abundance patterns in C1-C8 and C10-C18
Joel C. Zinn, Dennis Stello, Yvonne Elsworth +28
We present the third and final data release of the K2 Galactic Archaeology Program (K2 GAP) for Campaigns C1-C8 and C10-C18. We provide asteroseismic radius and mass coefficients,…
starry_process: Interpretable Gaussian processes for stellar light curves
Rodrigo Luger, Daniel Foreman-Mackey, Christina Hedges
In this note we present the starry_process code, which implements an interpretable Gaussian process (GP) for modeling variability in stellar light curves. As dark starspots rotate…
Mapping stellar surfaces II: An interpretable Gaussian process model for light curves
Rodrigo Luger, Daniel Foreman-Mackey, Christina Hedges
The use of Gaussian processes (GPs) as models for astronomical time series datasets has recently become almost ubiquitous, given their ease of use and flexibility. GPs excel in par…
Mapping stellar surfaces I: Degeneracies in the rotational light curve problem
Rodrigo Luger, Daniel Foreman-Mackey, Christina Hedges +1
Thanks to missions like Kepler and TESS, we now have access to tens of thousands of high precision, fast cadence, and long baseline stellar photometric observations. In principle,…
The K2 Galactic Archaeology Program Data Release 2: Asteroseismic results from campaigns 4, 6, & 7
Joel C. Zinn, Dennis Stello, Yvonne Elsworth +18
Studies of Galactic structure and evolution have benefitted enormously from Gaia kinematic information, though additional, intrinsic stellar parameters like age are required to bes…
On The XUV Luminosity Evolution of TRAPPIST-1
David P. Fleming, Rory Barnes, Rodrigo Luger +1
We model the long-term XUV luminosity of TRAPPIST-1 to constrain the evolving high-energy radiation environment experienced by its planetary system. Using Markov Chain Monte Carlo…
Rotation Period Evolution in Low-Mass Binary Stars: The Impact of Tidal Torques and Magnetic Braking
David P. Fleming, Rory Barnes, James R. A. Davenport +1
We examine how tides, stellar evolution, and magnetic braking shape the rotation period (P) evolution of low-mass stellar binaries up to orbital periods (P) of 100…
On The Lack of Circumbinary Planets Orbiting Isolated Binary Stars
David P. Fleming, Rory Barnes, David E. Graham +2
We outline a mechanism that explains the observed lack of circumbinary planets (CBPs) via coupled stellar-tidal evolution of isolated binary stars. Tidal forces between low-mass, s…