497 citations · 8.9k across the 119 of their papers we have counts for
118 papers
Stellar Cruise Control: Weakened Magnetic Braking Leads to Sustained Rapid Rotation of Old Stars
Nicholas Saunders, Jennifer L. van Saders, Alexander J. Lyttle +8
Despite a growing sample of precisely measured stellar rotation periods and ages, the strength of magnetic braking and the degree of departure from standard (Skumanich-like) spindo…
Simplifying asteroseismic analysis of solar-like oscillators: An application of principal component analysis for dimensionality reduction
M. B. Nielsen, G. R. Davies, W. J. Chaplin +5
The asteroseismic analysis of stellar power density spectra is often computationally expensive. The models used in the analysis may use several dozen parameters to accurately descr…
Systematics in Asteroseismic Modelling: Application of a Correlated Noise Model for Oscillation Frequencies
Tanda Li, Guy R. Davies, Martin Nielsen +2
The detailed modelling of stellar oscillations is a powerful approach to characterising stars. However, poor treatment of systematics in theoretical models leads to misinterpretati…
Detector bandwidth and polarisation switching rates: spectrophotometric observations of the Sun by the Birmingham Solar Oscillations Network (BiSON)
S. J. Hale, W. J. Chaplin, G. R. Davies +2
The Birmingham Solar Oscillations Network (BiSON) observes acoustic oscillations of the Sun. The dominant noise source is caused by fluctuations of Earth's atmosphere, and BiSON se…
Asteroseismology of Scuti stars: emulating model grids using a neural network
Owen J. Scutt, Simon J. Murphy, Martin B. Nielsen +3
Young Scuti stars have proven to be valuable asteroseismic targets but obtaining robust uncertainties on their inferred properties is challenging. We aim to quantify the random…
A Catalogue of Solar-Like Oscillators Observed by TESS in 120-second and 20-second Cadence
Emily Hatt, Martin B. Nielsen, William J. Chaplin +12
The Transiting Exoplanet Survey Satellite (TESS) mission has provided photometric light curves for stars across nearly the entire sky. This allows for the application of asteroseis…
The next generation Birmingham Solar Oscillations Network (BiSON) spectrophotometer: a new miniaturised instrument for helioseismology
S. J. Hale, W. J. Chaplin, G. R. Davies +2
We describe a new spectrophotometer for the Birmingham Solar Oscillations Network (BiSON), based on a next generation observation platform, BiSON:NG, a significantly miniaturised s…
A probabilistic method for detecting solar-like oscillations using meaningful prior information
M. B. Nielsen, E. Hatt, W. J. Chaplin +2
Current and future space-based observatories such as the Transiting Exoplanet Survey Satellite (TESS) and PLATO are set to provide an enormous amount of new data on oscillating sta…
Modelling stars with Gaussian Process Regression: Augmenting Stellar Model Grid
Tanda Li, Guy R. Davies, Alexander J. Lyttle +3
Grid-based modelling is widely used for estimating stellar parameters. However, stellar model grid is sparse because of the computational cost. This paper demonstrates an applicati…
Asteroseismology of 3,642 Kepler Red Giants: Correcting the Scaling Relations based on Detailed Modeling
Tanda Li, Yaguang Li, Shaolan Bi +3
The paper presents a correction to the scaling relations for red-giant stars using model-based masses and radii. We measure radial-mode frequencies from Kepler observations for 3,6…
Coralie radial-velocity search for companions around evolved stars (CASCADES) III. A new Jupiter host-star: in-depth analysis of HD 29399 using TESS data
C. Pezzotti, G. Ottoni, G. Buldgen +11
Context. Increasing the number of detected exoplanets is far from anecdotal, especially for long-period planets that require a long duration of observation. More detections imply a…
Coralie radial velocity search for companions around evolved stars (CASCADES) II. Seismic masses for three red giants orbited by long-period massive planets
G. Buldgen, G. Ottoni, C. Pezzotti +10
The advent of asteroseismology as the golden path to precisely characterize single stars naturally led to synergies with the field of exoplanetology. Today, the precise determinati…
Age Determination of Galaxy Merger Remnant Stars using Asteroseismology
Camilla C. Borre, Víctor Aguirre Børsen-Koch, Amina Helmi +12
The Milky Way was shaped by the mergers with several galaxies in the past. We search for remnant stars that were born in these foreign galaxies and assess their ages in an effort t…
Constraining the Rotation Profile in a Low-Luminosity Subgiant with a Surface Rotation Measurement
T. Wilson, A. R. Casey, I. Mandel +3
Rotationally-induced mode splitting frequencies of low-luminosity subgiants suggest that angular momentum transport mechanisms are 1-2 orders of magnitude more efficient in these s…
The BAyesian STellar Algorithm (BASTA): a fitting tool for stellar studies, asteroseismology, exoplanets, and Galactic archaeology
V. Aguirre Børsen-Koch, J. L. Rørsted, A. B. Justesen +16
We introduce the public version of the BAyesian STellar Algorithm (BASTA), an open-source code written in {\tt Python} to determine stellar properties based on a set of astrophysic…
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,…
Hierarchically modelling Kepler dwarfs and subgiants to improve inference of stellar properties with asteroseismology
Alexander J. Lyttle, Guy R. Davies, Tanda Li +9
With recent advances in modelling stars using high-precision asteroseismology, the systematic effects associated with our assumptions of stellar helium abundance () and the mixi…
Weakened magnetic braking supported by asteroseismic rotation rates of Kepler dwarfs
Oliver J. Hall, Guy R. Davies, Jennifer van Saders +9
Studies using asteroseismic ages and rotation rates from star-spot rotation have indicated that standard age-rotation relations may break down roughly half-way through the main seq…
Lifetimes and Rotation within the Solar Mean Magnetic Field
Eddie Ross, William J. Chaplin, Steven J. Hale +4
We have used very high-cadence (sub-minute) observations of the solar mean magnetic field (SMMF) from the Birmingham Solar Oscillations Network (BiSON) to investigate the morpholog…
Impact of magnetic activity on inferred stellar properties of main sequence Sun-like stars
Alexandra E. L. Thomas, William J. Chaplin, Sarbani Basu +3
The oscillation frequencies observed in Sun-like stars are susceptible to being shifted by magnetic activity effects. The measured shifts depend on a complex relationship involving…
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…
PBjam: A Python package for automating asteroseismology of solar-like oscillators
M. B. Nielsen, G. R. Davies, W. H. Ball +14
Asteroseismology is an exceptional tool for studying stars by using the properties of observed modes of oscillation. So far the process of performing an asteroseismic analysis of a…
Orbital misalignment of the super-Earth Men c with the spin of its star
Vedad Kunovac Hodžić, Amaury H. M. J. Triaud, Heather M. Cegla +2
Planet-planet scattering events can leave an observable trace of a planet's migration history in the form of orbital misalignment with respect to the the stellar spin axis, which i…
Chronologically dating the early assembly of the Milky Way
Josefina Montalbán, John Ted Mackereth, Andrea Miglio +16
The standard cosmological model (-CDM) predicts that galaxies are built through hierarchical assembly on cosmological timescales. The Milky Way, like other disc galaxies…