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.

Orlando, S., Reale, F., Peres, G., Mignone, A. (2013). Mass accretion processes in young stellar objects: Role of intense flaring activity. In Frascati Workshop 2013 - 10th International Workshop on Multifrequency Behaviour of High Energy Cosmic Sources (pp.108-112). International Workshop on Multifrequency Behaviour of High Energy Cosmic Sources [10.14311/APP.2014.01.0108].

Mass accretion processes in young stellar objects: Role of intense flaring activity

Orlando, Salvatore;REALE, Fabio;PERES, Giovanni;MIGNONE, ANDREA
2013-01-01

Abstract

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.
10th International Workshop on Multifrequency Behaviour of High Energy Cosmic Sources
Splendid Hotel La Torre, ita
2013
2013
5
Orlando, S., Reale, F., Peres, G., Mignone, A. (2013). Mass accretion processes in young stellar objects: Role of intense flaring activity. In Frascati Workshop 2013 - 10th International Workshop on Multifrequency Behaviour of High Energy Cosmic Sources (pp.108-112). International Workshop on Multifrequency Behaviour of High Energy Cosmic Sources [10.14311/APP.2014.01.0108].
Proceedings (atti dei congressi)
Orlando, S.; Reale, F.; Peres, G.; Mignone, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/232478
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