2010A&A...516L..14B


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.25CET09:28:42

2010A&A...516L..14B - Astronomy and Astrophysics, volume 516, L14-14 (2010/6-3)

Testing the theory of grain growth and fragmentation by millimeter observations of protoplanetary disks.

BIRNSTIEL T., RICCI L., TROTTA F., DULLEMOND C.P., NATTA A., TESTI L., DOMINIK C., HENNING T., ORMEL C.W. and ZSOM A.

Abstract (from CDS):

Observations at sub-millimeter and mm wavelengths will in the near future be able to resolve the radial dependence of the mm spectral slope in circumstellar disks with a resolution of around a few AU at the distance of the closest star-forming regions. We aim to constrain physical models of grain growth and fragmentation by a large sample of (sub-)mm observations of disks around pre-main sequence stars in the Taurus-Auriga and Ophiuchus star-forming regions. State-of-the-art coagulation/fragmentation and disk-structure codes are coupled to produce steady-state grain size distributions and to predict the spectral slopes at (sub-)mm wavelengths. This work presents the first calculations predicting the mm spectral slope based on a physical model of grain growth. Our models can quite naturally reproduce the observed mm-slopes, but a simultaneous match to the observed range of flux levels can only be reached by a reduction of the dust mass by a factor of a few up to about 30 while keeping the gas mass of the disk the same. This dust reduction can either be caused by radial drift at a reduced rate or during an earlier evolutionary time (otherwise the predicted fluxes would become too low) or due to efficient conversion of dust into larger, unseen bodies.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - circumstellar matter - stars: pre-main-sequence - protoplanetary disks - planets and satellites: formation - submillimeter: stars

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1232 0
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3572 0
3 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3083 0

    Equat.    Gal    SGal    Ecl

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2020.11.25-09:28:42

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