6533b862fe1ef96bd12c6c61

RESEARCH PRODUCT

Mass Accretion Processes in Young Stellar Objects: Role of Intense Flaring Activity

Andrea MignoneFabio RealeSalvatore OrlandoGiovanni Peres

subject

Angular momentumMHDStars: flareAstrophysics::High Energy Astrophysical PhenomenaYoung stellar objectFOS: Physical sciencesInterplanetary mediumAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAcoustics and UltrasonicAccretion accretion diskIntermediate polarAstrophysics::Solar and Stellar AstrophysicsX-rays: starSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy AstrophysicsNuclear and High Energy PhysicGeneral Environmental SciencePhysicsRadiationStar formationAstronomyAccretion (astrophysics)StarsAstrophysics - Solar and Stellar Astrophysicslcsh:TA1-2040Space and Planetary ScienceStars: circumstellar matterGeneral Earth and Planetary SciencesCircumstellar dustAstrophysics::Earth and Planetary Astrophysicslcsh:Engineering (General). Civil engineering (General)Stars: pre-main-sequence

description

According to the magnetospheric accretion scenario, young low-mass stars are surrounded by circumstellar disks which they interact with through accretion of mass. The accretion builds up the star to its final mass and is also believed to power the mass outflows, which may in turn have a significant role in removing the excess angular momentum from the star-disk system. Although the process of mass accretion is a critical aspect of star formation, some of its mechanisms are still to be fully understood. On the other hand, strong flaring activity is a common feature of young stellar objects (YSOs). In the Sun, such events give rise to perturbations of the interplanetary medium. Similar but more energetic phenomena occur in YSOs and may influence the circumstellar environment. In fact, a recent study has shown that an intense flaring activity close to the disk may strongly perturb the stability of circumstellar disks, thus inducing mass accretion episodes (Orlando et al. 2011). Here we review the main results obtained in the field and the future perspectives.

yearjournalcountryeditionlanguage
2014-01-02Acta Polytechnica CTU Proceedings
https://doi.org/10.14311/app.2014.01.0108