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Asteroseismology with PBjam 2.0: measuring dipole mode frequencies in coupling regimes from main sequence to low-luminosity red giant stars
M. B. Nielsen, J. M. J. Ong, E. J. Hatt +7
PBjam is an open-source software package for measuring mode frequencies of solar-like oscillators. These frequencies help constrain stellar evolution models to precisely estimate m…
Low-degree solar rotational splitting from 45 years of BiSON observations
Rachel Howe, W. J. Chaplin, Y. P. Elsworth +2
We present solar low-degree rotational splitting values based on a new analysis of Sun-as-a-star observations from the Birmingham Solar Oscillations Network, covering a 16,425-day…
Predicting convective blueshift and radial-velocity dispersion due to granulation for FGK stars
S. Dalal, R. D. Haywood, A. Mortier +2
To detect Earth-mass planets using the Doppler method, a major obstacle is to differentiate the planetary signal from intrinsic stellar variability (e.g., pulsations, granulation,…
A close-in giant planet escapes engulfment by its star
Marc Hon, Daniel Huber, Nicholas Z. Rui +39
When main-sequence stars expand into red giants, they are expected to engulf close-in planets. Until now, the absence of planets with short orbital periods around post-expansion, c…
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…
Revisiting the Red-giant Branch Hosts KOI-3886 and Draconis. Detailed Asteroseismic Modeling and Consolidated Stellar Parameters
Tiago L. Campante, Tanda Li, J. M. Joel Ong +23
Asteroseismology is playing an increasingly important role in the characterization of red-giant host stars and their planetary systems. Here, we conduct detailed asteroseismic mode…