GPPU Seminar

Date

14:00-16:00, October 16th, 2017

Place

Room N507, Science Complex C (H-04) map

Abstract

It has recently become evident from both numerical and observational studies that accretion of matter on both low-mass and high-mass protostars may have a highly variable character with episodic bursts revealing themselves as FU-Orionis-type and EX- Lupi-like eruptions. This newly emerging paradigm begins to supersede the classical Shu-Larson-Penston steady accretion model, and this change in our understanding of mass accretion may have important consequences for the evolution of stars and planets. I will review the current status of the variable accretion paradigm, focusing on the disk gravitational instability and fragmentation model, in which accretion bursts are triggered by dense gaseous clumps migrating onto the star. Various implications of variable accretion on both young stars and their protostellar disks will be discussed.

Point

GSP 1