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2011MNRAS.416..439E - Mon. Not. R. Astron. Soc., 416, 439-446 (2011/September-1)
On the lifetime of discs around late-type stars.
ERCOLANO B., BASTIAN N., SPEZZI L. and OWEN J.
Abstract (from CDS):
To this aim, we perform a Minimum Spanning Tree (MST) analysis on the spatial distribution of disc-bearing young stellar objects (YSOs) in six nearby low-mass star-forming regions. We find no evidence for significant age differences between the disc-bearing low-mass (later than M2) and `solar-type' (earlier than M2) stars in these regions. We model our results by constructing and analysing synthetic fractal distributions that we evolve for typical values of the velocity dispersions. A comparison of results obtained using simple models to the results from our MST analysis suggests that the lifetime of discs around M-stars is similar to that of discs around solar-type stars. Furthermore, a model-independent spatial analysis of the observations robustly shows that any age differences between the two samples must be smaller than the average age difference between disc-bearing classical T Tauri stars and discless weak-lined T Tauri stars.
Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS
Journal keyword(s): accretion, accretion discs - protoplanetary discs - circumstellar matter - stars: pre-main-sequence
Simbad objects: 7
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