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

Authors

  • Salvatore Orlando INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134, Palermo
  • Fabio Reale Dip. di Fisica e Chimica, Universita degli Studi di Palermo, Piazza del Parlamento, 1, 90134, Palermo,
  • Giovanni Peres Dip. di Fisica e Chimica, Universita degli Studi di Palermo, Piazza del Parlamento, 1, 90134, Palermo,
  • Andrea Mignone Dip. di Fisica Generale, Universita degli Studi di Torino, via Pietro Giuria 1, 10125, Torino, Italy

DOI:

https://doi.org/10.14311/APP.2014.01.0108

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 nal mass and is also believed to power the mass out ows, which may in turn have a signicant 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, strongĀ  aring 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 in uence 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 eld and the future perspectives.

Downloads

Published

2014-12-04