SIMBAD references

2012ApJ...745...23M - Astrophys. J., 745, 23 (2012/January-3)

The late stages of protoplanetary disk evolution: a millimeter survey of Upper Scorpius.

MATHEWS G.S., WILLIAMS J.P., MENARD F., PHILLIPS N., DUCHENE G. and PINTE C.

Abstract (from CDS):

We present deep 1.2 mm photometry of 37 stars in the young (5 Myr) Upper Scorpius OB association, sensitive to ∼4x10–3 MJup of cool millimeter dust. Disks around four low- and solar-mass stars are detected, as well as one debris disk around an intermediate-mass star, with dust masses ranging from 3.6x10–3 to 1.0x10–1 MJup. The source with the most massive disk exhibits a transition-disk spectral energy distribution. Combining our results with previous studies, we find that the millimeter-detection fraction of Class II sources has significantly decreased from younger ages, and comparison with near-infrared and Hα measurements indicates that the present disks have undergone significant evolution in composition or structure at all radii. The disks of Upper Scorpius represent the tail-end of the depletion of primordial disks; while a few near-solar-mass stars may still sustain giant planet formation, this process has finished around higher mass stars.

Abstract Copyright:

Journal keyword(s): circumstellar matter - open clusters and associations: individual: Upper Scorpius OB1 - protoplanetary disks - stars: pre-main sequence

Simbad objects: 48

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2020.01.28-18:49:21

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