Ambipolar-Diffusion Timescale, Star-Formation Timescale, and the Ages of Molecular Clouds: Is There a Discrepancy?
Astrophysics
2009-11-10 v1
Abstract
We re-examine critically the estimates of the duration of different phases of star formation and the lifetimes of molecular clouds, based on the ages of T-Tauri stars, age spreads of stars in clusters, and statistics of pre-stellar cores. We show that all available observational data are consistent with lifetimes of molecular clouds comparable to 10 Myr, as well as with the predictions of the theory of self-initiated, ambipolar-diffusion--controlled star formation. We conclude that there exists no observational support for either "young" molecular clouds or "rapid" star formation.
Keywords
Cite
@article{arxiv.astro-ph/0409089,
title = {Ambipolar-Diffusion Timescale, Star-Formation Timescale, and the Ages of Molecular Clouds: Is There a Discrepancy?},
author = {Konstantinos Tassis and Telemachos Ch. Mouschovias},
journal= {arXiv preprint arXiv:astro-ph/0409089},
year = {2009}
}
Comments
Accepted for publication in the Astrophysical Journal. 5 pages, 4 figures, uses emulateapj.cls