Spectroscopic evidence for protostellar infall |
| |
Authors: | J M C Rawlings |
| |
Institution: | (1) Department of Physics and Astronomy, University College London, Gower Street, WC1E 6BT London |
| |
Abstract: | The observational evidence for infall associated with star formation is discussed. Whilst spectral energy distributions of
young protostellar objects are consistent with infall, the best direct evidence comes from millimetre and sub-millimetre spectral
line observations. Considerations of the formation of the line profiles and the chemical effects of gas-grain interactions
suggest that there is only a very short ‘window’ in the evolutionary track of a protostellar object during which infall is
directly observable. This may explain why so few infall candidates have been detected. It is argued that self-consistent models
of the dynamical and chemical evolution of collapsing cores, coupled to multiple high resolution line observations, will provide
definitive evidence for the presence of infall in these objects. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|