Search Results - "Breton, Sylvain N."
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1
Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
Published in The Astrophysical journal (01-11-2022)“…Abstract In this paper, we report the potential detection of a nonmonotonic radial rotation profile in a low-mass lower-luminosity giant star. For most low-…”
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2
TESS Asteroseismology of β Hydri: A Subgiant with a Born-again Dynamo
Published in The Astrophysical journal (01-10-2024)“…Abstract The solar-type subgiant β Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been measured directly, it was…”
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3
Magnetic Activity Evolution of Solar-like Stars. I. S ph–Age Relation Derived from Kepler Observations
Published in The Astrophysical journal (01-08-2023)“…Abstract The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archeology. While ages are usually…”
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4
Kepler main-sequence solar-like stars: surface rotation and magnetic-activity evolution
Published in Frontiers in astronomy and space sciences (15-03-2024)“…While the mission’s primary goal was focused on exoplanet detection and characterization, Kepler made and continues to make extraordinary advances in stellar…”
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5
Magnetic Activity Evolution of Solar-like Stars. I. Sph–Age Relation Derived from Kepler Observations
Published in The Astrophysical journal (01-08-2023)“…The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archeology. While ages are usually computed…”
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6
Asteroseismology and Spectropolarimetry of the Exoplanet Host Star λ Serpentis
Published in The Astronomical journal (01-10-2023)“…Abstract The bright star λ Ser hosts a hot Neptune with a minimum mass of 13.6 M ⊕ and a 15.5 day orbit. It also appears to be a solar analog, with a mean…”
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7
Revisiting the Red Giant Branch Hosts KOI-3886 and ι Draconis. Detailed Asteroseismic Modeling and Consolidated Stellar Parameters
Published in The Astronomical journal (01-05-2023)“…Abstract Asteroseismology is playing an increasingly important role in the characterization of red giant host stars and their planetary systems. Here, we…”
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TESS Asteroseismic Analysis of HD 76920: The Giant Star Hosting an Extremely Eccentric Exoplanet
Published in The Astrophysical journal (01-03-2023)“…Abstract The Transiting Exoplanet Survey Satellite (TESS) mission searches for new exoplanets. The observing strategy of TESS results in high-precision…”
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9
Tracking active nests in solar-type pulsators: Ensemble starspot modelling of Kepler asteroseismic targets
Published 05-12-2023“…The satellite Planetary Transits and Oscillations of stars (PLATO), due to be launched late 2026, will provide us with an unprecedented sample of light curves…”
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10
Seismic differences between solar magnetic cycles 23 and 24 for low-degree modes
Published 31-10-2024“…Solar magnetic activity follows regular cycles of about 11 years with an inversion of polarity in the poles every 22 years. This changing surface magnetism…”
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Imprint of the magnetic activity cycle on solar asteroseismic characterisation based on 26 years of GOLF and BiSON data
Published 22-07-2024“…A&A 688, L17 (2024) Building on the success of previous missions, asteroseismic modelling will play a key role in future space-based missions, such as PLATO,…”
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12
Stochastic excitation of internal gravity waves in rotating late F-type stars: A 3D simulation approach
Published 31-08-2022“…A&A 667, A43 (2022) There are no strong constraints placed thus far on the amplitude of internal gravity waves (IGWs) that are stochastically excited in the…”
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13
Measuring stellar rotation and activity with PLATO
Published 02-10-2023“…Due to be launched late 2026, the PLATO mission will bring the study of main-sequence solar-type and low-mass stars into a new era. In particular, PLATO will…”
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14
TESS asteroseismology of $\beta$ Hydri: a subgiant with a born-again dynamo
Published 10-08-2024“…Astrophys. J. 974, 31 (2024) The solar-type subgiant $\beta$ Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been…”
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15
In search of gravity mode signatures in main sequence solar-type stars observed by Kepler
Published 27-09-2023“…A&A 679, A104 (2023) Gravity modes (g modes), mixed gravito-acoustic modes (mixed modes), and gravito-inertial modes (gi modes) possess unmatched properties as…”
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16
Hunting for anti-solar differentially rotating stars using the Rossby number -- An application to the Kepler field
Published 25-08-2022“…A&A 667, A50 (2022) Anti-solar differential rotation profiles have been found for decades in numerical simulations of convective envelopes of solar-type stars…”
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17
Magnetic activity evolution of solar-like stars: I. S_ph-Age relation derived from Kepler observations
Published 20-06-2023“…The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archaeology. While ages are usually…”
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18
Solid tidal friction in multi-layer planets: Application to Earth, Venus, a Super Earth and the TRAPPIST-1 planets. Can a multi-layer planet be approximated as a homogeneous planet?
Published 09-10-2020“…A&A 644, A165 (2020) With the discovery of TRAPPIST-1 and its seven planets within 0.06 au, the correct treatment of tidal interactions is becoming necessary…”
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19
Asteroseismology with the Roman Galactic Bulge Time-Domain Survey
Published 06-07-2023“…Asteroseismology has transformed stellar astrophysics. Red giant asteroseismology is a prime example, with oscillation periods and amplitudes that are readily…”
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20
ROOSTER: a machine-learning analysis tool for Kepler stellar rotation periods
Published 25-01-2021“…A&A 647, A125 (2021) In order to understand stellar evolution, it is crucial to efficiently determine stellar surface rotation periods. An efficient tool to…”
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