Ambipolar-diffusion timescale, star formation timescale, and the ages of molecular clouds: Is there a discrepancy?

Konstantinos Tassis, Telemachos Ch Mouschovias

Research output: Contribution to journalArticle

Abstract

We reexamine 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 prestellar cores. We show that all available observational data are consistent with lifetimes of molecular clouds comparable to ∼107 yr, 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.

Original languageEnglish (US)
Pages (from-to)283-287
Number of pages5
JournalAstrophysical Journal
Volume616
Issue number1 I
DOIs
StatePublished - Nov 20 2004

Fingerprint

ambipolar diffusion
molecular clouds
star formation
timescale
life (durability)
T Tauri stars
prediction
statistics
stars
estimates
predictions
young

Keywords

  • Accretion, accretion disks
  • Dust, extinction
  • ISM: Magnetic fields MHD
  • ISM: clouds
  • Stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Ambipolar-diffusion timescale, star formation timescale, and the ages of molecular clouds : Is there a discrepancy? / Tassis, Konstantinos; Mouschovias, Telemachos Ch.

In: Astrophysical Journal, Vol. 616, No. 1 I, 20.11.2004, p. 283-287.

Research output: Contribution to journalArticle

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