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Title:
Photoevaporation of circumstellar discs
Authors:
Alexander, R. D.; Clarke, C. J.; Pringle, J. E.
Affiliation:
AA(Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK ), AB(Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK ), AC(Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK )
Publication:
Memorie della Societa Astronomica Italiana, v.76, p.354 (2005)
Publication Date:
00/2005
Origin:
MmSAI
Keywords:
accretion, accretion discs, stars: formation, circumstellar matter, planetary systems: protoplanetary discs, stars: pre-main sequence
Bibliographic Code:
2005MmSAI..76..354A

Abstract

Models which couple viscous evolution and photoevaporation have the potential to explain the observed rapid dispersal of discs around T Tauri stars. However the source of the ionizing radiation required to drive the photoevaporation was poorly constrained. We have investigated a number of potential ionizing sources and found that emission from the chromospheres of these stars appears to be sufficient to drive the photoevaporation.

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Database: Astronomy
Physics
arXiv e-prints