82 citations · 553 across the 28 of their papers we have counts for
29 papers
Hints of enhanced magnetic activity after the intermediate rotation period gap as traced by the chromospheric Ca ii infrared triplet
Diego Godoy-Rivera, Savita Mathur, Tyler Richey-Yowell +5
For low-mass stars (M < 1.4 Msun), the connection between stellar rotation and magnetic activity governs stellar spin-down, shapes the environments of their exoplanets, and provide…
Hidden worlds: A non-transiting candidate planet in the Neptunian desert around the solar-type pulsator KIC 9139163
Sylvain N. Breton, Achrène Dyrek, Carlos Allende Prieto +16
Close-in substellar companions experience strong tidal and magnetic interactions with their host stars and are therefore subject to fast orbital evolution. The solar-type pulsator…
Rapidly oscillating Ap stars observed with TESS. The LAMOST Ap sample and 49 Cam
Inês Rolo, Daniel L. Holdsworth, Margarida S. Cunha +4
The rapidly oscillating chemically peculiar A-type (roAp) stars offer valuable insights into the internal physical processes of all stars, but their study is challenged by their ra…
Modelling solar radial velocities and photometric variability with SOAPv4
Alba Barka, Eduardo Cristo, Ângela R. G. Santos +5
Stellar activity remains one of the main limitations in the detection of Earth-like planets using radial velocity (RV) measurements. The Sun, as the only star for which surface fea…
Mining the Kepler Field: Atmospheric Parameters, Bolometric Corrections, and Luminosities
Diego Godoy-Rivera, Desmond H. Grossmann, Tyler Richey-Yowell +3
The ~ 200,000 stars observed by the Kepler mission have provided unprecedented constraints across astrophysics. With the advent of modern spectroscopic and photometric surveys, new…
Signature of spin-down stalling in stellar magnetic activity. The case of the open cluster NGC 6811
Ângela R. G. Santos, Diego Godoy-Rivera, Savita Mathur +3
Stellar rotation and magnetic activity have a complex evolution that reveals multiple regimes. One of the related transitions that is seen in the rotation distribution for main-seq…
Magnetic activity evolution of solar-like stars: II. -Ro evolution of Kepler main-sequence targets
Savita Mathur, Angela R. G. Santos, Zachary R. Claytor +16
There is now a large sample of stars observed by the Kepler satellite with measured rotation periods and photometric activity index . We use this data, in conjunction w…
Perspectives on the Physics of Late-Type Stars from Beyond Low Earth Orbit, the Moon and Mars
Savita Mathur, Ângela R. G. Santos
With the new discoveries enabled thanks to the recent space missions, stellar physics is going through a revolution. However, these discoveries opened the door to many new question…
APOKASC-3: The Third Joint Spectroscopic and Asteroseismic catalog for Evolved Stars in the Kepler Fields
Marc H. Pinsonneault, Joel C. Zinn, Jamie Tayar +38
In the third APOKASC catalog, we present data for the complete sample of 15,808 evolved stars with APOGEE spectroscopic parameters and Kepler asteroseismology. We used ten independ…
Kepler main-sequence solar-like stars: surface rotation and magnetic-activity evolution
A. R. G. Santos, D. Godoy-Rivera, A. J. Finley +4
While the mission's primary goal was focused on exoplanet detection and characterization, Kepler made and continues to make extraordinary advances in stellar physics. Stellar rotat…
Measuring stellar rotation and activity with PLATO
Sylvain N. Breton, Antonino F. Lanza, Sergio Messina +6
Due to be launched late 2026, the PLATO mission will bring the study of main-sequence solar-type and low-mass stars into a new era. In particular, PLATO will provide the community…
In search of gravity mode signatures in main sequence solar-type stars observed by Kepler
Sylvain N. Breton, Hachem Dhouib, Rafael A. García +7
Gravity modes (g modes), mixed gravito-acoustic modes (mixed modes), and gravito-inertial modes (gi modes) possess unmatched properties as probes for stars with radiative interiors…
Magnetic activity evolution of solar-like stars: I. S_ph-Age relation derived from Kepler observations
Savita Mathur, Zachary R. Claytor, Angela R. G. Santos +9
The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archaeology. While ages are usually computed from stellar evolut…
Rotational modulation in A and F stars: Magnetic stellar spots or convective core rotation?
Andreea I. Henriksen, Victoria Antoci, Hideyuki Saio +7
The Kepler mission revealed a plethora of stellar variability in the light curves of many stars, some associated with magnetic activity or stellar oscillations. In this work, we an…
A 4 Gyr M-dwarf Gyrochrone from CFHT/MegaPrime Monitoring of the Open Cluster M67
Ryan Dungee, Jennifer van Saders, Eric Gaidos +5
We present stellar rotation periods for late K- and early M-dwarf members of the 4 Gyr old open cluster M67 as calibrators for gyrochronology and tests of stellar spin-down models.…
Hunting for anti-solar differentially rotating stars using the Rossby number -- An application to the Kepler field
Quentin Noraz, Sylvain N. Breton, Allan Sacha Brun +5
Anti-solar differential rotation profiles have been found for decades in numerical simulations of convective envelopes of solar-type stars. These profiles are characterized by a sl…
ET White Paper: To Find the First Earth 2.0
Jian Ge, Hui Zhang, Weicheng Zang +163
We propose to develop a wide-field and ultra-high-precision photometric survey mission, temporarily named "Earth 2.0 (ET)". This mission is designed to measure, for the first time,…
Brightness Fluctuation Spectra of Sun-Like Stars. I. The Mid-Frequency Continuum
Timothy M. Brown, Rafael A. Garcia, Savita Mathur +2
We analyze space-based time series photometry of Sun-like stars, mostly in the Pleiades, but also field stars and the Sun itself. We focus on timescales between roughly 1 hour and…
ROOSTER: a machine-learning analysis tool for Kepler stellar rotation periods
Sylvain N. Breton, Angela R. G. Santos, Lisa Bugnet +3
In order to understand stellar evolution, it is crucial to efficiently determine stellar surface rotation periods. An efficient tool to automatically determine reliable rotation pe…
Robust asteroseismic properties of the bright planet host HD 38529
Warrick H. Ball, William J. Chaplin, Martin B. Nielsen +21
The Transiting Exoplanet Survey Satellite (TESS) is recording short-cadence, high duty-cycle timeseries across most of the sky, which presents the opportunity to detect and study o…
The Evolution of Rotation and Magnetic Activity in 94 Aqr Aa from Asteroseismology with TESS
Travis S. Metcalfe, Jennifer L. van Saders, Sarbani Basu +29
Most previous efforts to calibrate how rotation and magnetic activity depend on stellar age and mass have relied on observations of clusters, where isochrones from stellar evolutio…
The multi-planet system TOI-421 -- A warm Neptune and a super puffy mini-Neptune transiting a G9 V star in a visual binary
Ilaria Carleo, Davide Gandolfi, Oscar Barragán +110
We report the discovery of a warm Neptune and a hot sub-Neptune transiting TOI-421 (BD-14 1137, TIC 94986319), a bright (V=9.9) G9 dwarf star in a visual binary system observed by…
Chemical Evolution in the Milky Way: Rotation-based ages for APOGEE-Kepler cool dwarf stars
Zachary R. Claytor, Jennifer L. van Saders, Angela R. G. Santos +5
We use models of stellar angular momentum evolution to determine ages for stars in the APOGEE-\textit{Kepler} Cool Dwarfs sample. We focus on lower main-sequence stars, w…
Revisiting the impact of stellar magnetic activity on the detectability of solar-like oscillations by Kepler
S. Mathur, R. A. Garcia, L. Bugnet +3
Over 2,000 stars were observed for one month with a high enough cadence in order to look for acoustic modes during the survey phase of the Kepler mission. Solar-like oscillations h…