Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2010-03-30
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
15 pages, 6 figures, to appear in the ASP conference proceedings of the "Frank N. Bash Symposium 2009: New Horizons in Astrono
Scientific paper
Protoplanetary disks are thought to be the birth places of planetary systems. The formation and the subsequent evolution of protoplanetary disks are regulated by the star formation process, which begins with the collapse of a cloud core to form a central protostar surrounded by a disk and an overlying envelope. In the protostellar phase, most of the envelope material is transferred onto the star through the disk during episodic, high accretion events. The initial conditions for planet formation in protoplanetary disks are likely set by the details of these processes. In this contribution, I will review some of the new observational results from Spitzer on protostellar evolution and the structure and evolution of protoplanetary disks surrounding young stars in the nearby star forming regions. The implications of these results for planet formation and eventual disk dissipation are discussed.
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