681 citations · 13.6k across the 127 of their papers we have counts for
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Asteroseismic radii of dwarfs: New accuracy constraints from Gaia DR2 parallaxes
Christian L. Sahlholdt, Victor Silva Aguirre
Precise stellar masses and radii can be determined using asteroseismology, but their accuracy must be tested against independent estimates. Using radii derived from Gaia DR2 parall…
Galactic Archaeology with asteroseismic ages: evidence for delayed gas infall in the formation of the Milky Way disc
E. Spitoni, V. Silva Aguirre, F. Matteucci +2
Precise stellar ages from asteroseismology have become available and can help setting stronger constraints on the evolution of the Galactic disc components. Recently, asteroseismol…
Coupling 1D stellar evolution with 3D-hydrodynamical simulations on-the-fly I: A New Standard Solar Model
Andreas Christ Sølvsten Jørgensen, Jakob Rørsted Mosumgaard, Achim Weiss +2
Standard 1D stellar evolution models do not correctly reproduce the structure of the outermost layers of stars with convective envelopes. This has been a long-standing problem in s…
The orbital eccentricity of small planet systems
Vincent Van Eylen, Simon Albrecht, Xu Huang +8
We determine the orbital eccentricities of individual small Kepler planets, through a combination of asteroseismology and transit light-curve analysis. We are able to constrain the…
Stellar models with calibrated convection and temperature stratification from 3D hydrodynamics simulations
Jakob Rørsted Mosumgaard, Warrick H. Ball, Víctor Silva Aguirre +2
Stellar evolution codes play a major role in present-day astrophysics, yet they share common simplifications related to the outer layers of stars. We seek to improve on this by the…
Inference of stellar parameters from brightness variations
Melissa K. Ness, Victor Silva Aguirre, Mikkel N. Lund +4
It has been demonstrated that the time variability of a star's brightness at different frequencies can be used to infer its surface gravity, radius, mass, and age. With large sampl…
HD 89345: a bright oscillating star hosting a transiting warm Saturn-sized planet observed by K2
V. Van Eylen, F. Dai, S. Mathur +40
We report the discovery and characterization of HD 89345b (K2-234b; EPIC 248777106b), a Saturn-sized planet orbiting a slightly evolved star. HD 89345 is a bright star ( m…
The Second APOKASC Catalog: The Empirical Approach
Marc H. Pinsonneault, Yvonne P. Elsworth, Jamie Tayar +33
We present a catalog of stellar properties for a large sample of 6676 evolved stars with APOGEE spectroscopic parameters and \textit{Kepler} asteroseismic data analyzed using five…
Interferometric diameters of five evolved intermediate-mass planet-hosting stars measured with PAVO at the CHARA Array
T. R. White, D. Huber, A. W. Mann +8
Debate over the planet occurrence rates around intermediate-mass stars has hinged on the accurate determination of masses of evolved stars, and has been exacerbated by a paucity of…
Using asteroseismology to characterise exoplanet host stars
Mia S. Lundkvist, Daniel Huber, Victor Silva Aguirre +1
The last decade has seen a revolution in the field of asteroseismology - the study of stellar pulsations. It has become a powerful method to precisely characterise exoplanet host s…
Ages for exoplanet host stars
Joergen Christensen-Dalsgaard, Victor Silva Aguirre
Age is an important characteristic of a planetary system, but also one that is difficult to determine. Assuming that the host star and the planets are formed at the same time, the…
The Updated BaSTI Stellar Evolution Models and Isochrones: I. Solar Scaled Calculations
S. L. Hidalgo, A. Pietrinferni, S. Cassisi +6
We present an updated release of the BaSTI (a Bag of Stellar Tracks and Isochrones) stellar model and isochrone library for a solar scaled heavy element distribution. The main inpu…
Testing Asteroseismic Radii of Dwarfs and Subgiants with Kepler and Gaia
C. L. Sahlholdt, V. Silva Aguirre, L. Casagrande +2
We test asteroseismic radii of Kepler main-sequence and subgiant stars by deriving their parallaxes which are compared with those of the first Gaia data release. We compute radii b…
KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System
Marshall C. Johnson, Joseph E. Rodriguez, George Zhou +65
We present the discovery of KELT-21b, a hot Jupiter transiting the A8V star HD 332124. The planet has an orbital period of days and a radius of $…