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13 papers · 2 filters
Changes in the near-surface shear layer of the Sun
H. M. Antia, Sarbani Basu
We use helioseismic data obtained over two solar cycles to determine whether there are changes in the near-surface shear layer (NSSL). We examine this by determining the radial gra…
Testing Models of Triggered Star Formation with Young Stellar Objects in Cepheus OB4
Abby Mintz, Joseph L. Hora, Elaine Winston
OB associations are home to newly formed massive stars, whose turbulent winds and ionizing flux create H II regions rich with star formation. Studying the distribution and abundanc…
PLATO Hare-and-Hounds exercise: Asteroseismic model fitting of main-sequence solar-like pulsators
M. S. Cunha, I. W. Roxburgh, V. Aguirre Børsen-Koch +19
Asteroseismology is a powerful tool to infer fundamental stellar properties. The use of these asteroseismic-inferred properties in a growing number of astrophysical contexts makes…
Mixed Modes and Asteroseismic Surface Effects: II. Subgiant Systematics
J. M. Joel Ong, Sarbani Basu, Mikkel N. Lund +3
Models of solar-like oscillators yield acoustic modes at different frequencies than would be seen in actual stars possessing identical interior structure, due to modelling error ne…
Magnetic and Rotational Evolution of CrB from Asteroseismology with TESS
Travis S. Metcalfe, Jennifer L. van Saders, Sarbani Basu +15
During the first half of main-sequence lifetimes, the evolution of rotation and magnetic activity in solar-type stars appears to be strongly coupled. Recent observations suggest th…
A 20-Second Cadence View of Solar-Type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Re-characterization of pi Men c
Daniel Huber, Timothy R. White, Travis S. Metcalfe +50
We present an analysis of the first 20-second cadence light curves obtained by the TESS space telescope during its extended mission. We find a precision improvement of 20-second da…