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Article
A close-in giant planet escapes engulfment by its star
When main-sequence stars expand into red giants, they are expected to engulf close-in planets1–5. Until now, the absence of planets with short orbital periods around post-expansion, core-helium-burning red giants
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Chapter and Conference Paper
Stellar Dating Using Chemical Clocks and Bayesian Inference
Dating stars is a major challenge with a deep impact on many astrophysical fields. One of the most promising techniques for this is using chemical abundances. Recent space- and ground-based facilities have imp...
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Article
Weakened magnetic braking supported by asteroseismic rotation rates of Kepler dwarfs
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 sequence lifetime, a phenomenon ...
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Article
Chronologically dating the early assembly of the Milky Way
The standard cosmological model predicts that galaxies are built through hierarchical assembly on cosmological timescales1,2. The Milky Way, like other disk galaxies, underwent violent mergers and accretion of sm...
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Article
Very regular high-frequency pulsation modes in young intermediate-mass stars
Asteroseismology probes the internal structures of stars by using their natural pulsation frequencies1. It relies on identifying sequences of pulsation modes that can be compared with theoretical models, which ha...
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Article
Age dating of an early Milky Way merger via asteroseismology of the naked-eye star ν Indi
Over the course of its history, the Milky Way has ingested multiple smaller satellite galaxies1. Although these accreted stellar populations can be forensically identified as kinematically distinct structures wit...
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Chapter and Conference Paper
Michael Thompson’s Legacy in Solar and Stellar Physics
Professor Michael J. Thompson died on 15 October 2018. Michael made long-lasting contributions to the international research community as both a research pioneer in the field of solar and stellar astrophysics ...
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Article
Open AccessThe Behaviour of Galactic Cosmic-Ray Intensity During Solar Activity Cycle 24
We have studied long-term variations of galactic cosmic-ray (GCR) intensity in relation to the sunspot number (SSN) during the most recent solar cycles. This study analyses the time lag between the GCR intensi...
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Reference Work Entry In depth
Characterizing Host Stars Using Asteroseismology
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 characterize exoplanet host stars and as a consequence als...
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Living Reference Work Entry In depth
Characterizing Host Stars using Asteroseismology
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 characterize exoplanet host stars and as a consequence als...
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Chapter and Conference Paper
“Rapid-Fire” Spectroscopy of Kepler Solar-Like Oscillators
The NASA Kepler mission has been continuously monitoring the same field of the sky since the successful launch in March 2009, providing high-quality stellar lightcurves that are excellent data for asteroseismolog...
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Chapter and Conference Paper
Solar-Like Oscillating Stars as Standard Clocks and Rulers for Galactic Studies
The CoRoT and Kepler space missions have detected oscillations in hundreds of Sun-like stars and thousands of field red-giant stars. This has opened the door to a new era of stellar population studies in the Milk...
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Chapter
Inferences on Stellar Activity and Stellar Cycles from Asteroseismology
The solar activity cycle can be studied using many different types of observations, such as counting sunspots, measuring emission in the Ca II H&K lines, magnetograms, radio emissions, etc. One of the more rec...
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Article
Inferences on Stellar Activity and Stellar Cycles from Asteroseismology
The solar activity cycle can be studied using many different types of observations, such as counting sunspots, measuring emission in the Ca II H&K lines, magnetograms, radio emissions, etc. One of the more rec...
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Article
Erratum: A sub-Mercury-sized exoplanet
Nature 494, 452–454 (2013); doi:10.1038/nature11914 In this Letter, the Centro de Astrobiología affiliation (number 11, associated with authors David Barrado and Jorge Lillo-Box) was listed incorrectly; the co...
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Article
A sub-Mercury-sized exoplanet
Stellar data from the Kepler spacecraft are used to infer the existence of a sub-Mercury-sized exoplanet, the smallest yet discovered, in orbit around a Sun-like star.
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Article
Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
NASA's Kepler mission has been remarkably productive in its primary role, that of discovering and characterizing extrasolar planets. It does this indirectly, by monitoring the brightness of many thousands of m...
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Article
Determining stellar radii using large separations: an error analysis
The Kepler mission will provide large separations for many stars. One of the tasks of Kepler Asteroseismic Consortium is to determine radii of the observed stars from the large separations and other catalogued...
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Article
Open AccessPerspectives in Global Helioseismology and the Road Ahead
We review the impact of global helioseismology on key questions concerning the internal structure and dynamics of the Sun and consider the exciting challenges the field faces as it enters a fourth decade of sc...
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Chapter
Perspectives in Global Helioseismology and the Road Ahead
We review the impact of global helioseismology on key questions concerning the internal structure and dynamics of the Sun and consider the exciting challenges the field faces as it enters a fourth decade of sc...
