Grain Growth in Circumstellar Disks

Details Grain Growth in Circumstellar Disks Grain Growth in Circumstellar Disks

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..323..279n&link_type=abstract

Star Formation in the Interstellar Medium: In Honor of David Hollenbach, Chris McKee and Frank Shu, ASP Conference Proceedings,

Astronomy and Astrophysics

Astronomy

5

Scientific paper

This review examines the evidence for very large grains in the outer disks of pre-main--sequence stars, and shows how new, high spatial resolution data at 7 millimeter solve the ambiguity present when deriving dust opacity from the long-wavelength spectral energy distribution. In some stars at least, the millimeter emission is due to sand and pebbles, i.e., bodies with sizes of at least few millimeters, and probably of several centimeters. However, it is unlikely that planetesimals (i.e., km-size bodies) contains most of the original solid mass. The same data suggest the intriguing possibility that disks were, at least early in their evolution, much more massive than currently thought.

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