Disk Fraction in a Low-Metallicity Environment

Details Disk Fraction in a Low-Metallicity Environment Disk Fraction in a Low-Metallicity Environment

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1158..171y&link_type=abstract

EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY: Proceedings of the International Conference. AIP Conference Proceedings, V

Physics

Star Formation, X- And Gamma-Ray Telescopes And Instrumentation, Accretion And Accretion Disks

Scientific paper

The extreme outer galaxy (EOG), at a galactic radius of more than 18 kpc, is known to have very low metallicity. We find that in two very young (~0.5 Myr) star-forming clusters in the EOG the fraction of stars with near-infrared excess is significantly lower than for those in the solar neighborhood. Our results suggest that most stars forming in the low-metallicity environment experience disk dispersal at an earlier stage (<1 Myr) than those forming in the solar metallicity environment (as much as ~5-6 Myr).

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