0000000000190352

AUTHOR

Estelle Moraux

showing 2 related works from this author

Supersaturation and activity-rotation relation in PMS stars: the young Cluster h Per

2016

The magnetic activity of late-type MS stars is characterized by different regimes, and their activity levels are well described by Ro, the ratio between P_rot and the convective turnover time. Very young PMS stars show, similarly to MS stars, intense magnetic activity. However they do not show clear activity-rotation trends, and it still debated which stellar parameters determine their magnetic activity levels. To bridge the gap between MS and PMS stars, we studied the activity-rotation relation in the young cluster h Per, a ~13 Myr old cluster, that contains both fast and slow rotators, whose members have ended their accretion phase and have already developed a radiative core. It offers us…

Stars: activityRotation periodFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesRossby numberSettore FIS/05 - Astronomia E Astrofisica0103 physical sciencesRadiative transferAstrophysics::Solar and Stellar AstrophysicsStars: coronaeX-rays: star010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy AstrophysicsPhysics010308 nuclear & particles physicsStars: rotationAstronomy and AstrophysicsAstronomy and AstrophysicEffective temperatureAccretion (astrophysics)Magnetic fieldStarsAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary ScienceStars: pre-main sequenceAstrophysics::Earth and Planetary AstrophysicsDynamo
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Activity and Rotation in the Young Cluster h Per

2013

We study the stellar rotation-activity relation in the crucial age at which stars reach the fastest rotation. To this aim we have analyzed data of the young cluster h Per, very rich and compact, located at 2300 pc, that at an age of 13 Myr should be mainly composed of stars that have ended their contraction phase and that have not lost significant angular momentum viamagnetic breaking. To constrain the activity level of h Per members we have analyzed a deep Chandra/ACIS-I observation. Rotational periods of h Per members have been derived by Moraux et al. (2013) in the framework of the MONITOR project (Aigrain et al. 2007; Irwin et al. 2007). In the Chandra observation we have detected 1010 …

PhysicsK-type main-sequence starStellar collisionactivity rotation young starsAstronomyAstronomy and AstrophysicsAstrophysicsRotationT Tauri starDynamo Stars: activity Stars: pre-main sequence X-rays: starsSettore FIS/05 - Astronomia E AstrofisicaSpace and Planetary ScienceCluster (physics)Dynamo
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