SIMBAD references

2014ApJ...791...42Z - Astrophys. J., 791, 42 (2014/August-2)

Comparison of the dust and gas radial structure in the transition disk [PZ99] J160421.7-213028.


Abstract (from CDS):

We present ALMA observations of the 880 µm continuum and CO J = 3-2 line emission from the transition disk around [PZ99] J160421.7-213028, a solar mass star in the Upper Scorpius OB association. Analysis of the continuum data indicates that 80% of the dust mass is concentrated in an annulus extending between 79 and 114 AU in radius. Dust is robustly detected inside the annulus, at a mass surface density 100 times lower than that at 80 AU. The CO emission in the inner disk also shows a significantly decreased mass surface density, but we infer a cavity radius of only 31 AU for the gas. The large separation of the dust and gas cavity edges, as well as the high radial concentration of millimeter-sized dust grains, is qualitatively consistent with the predictions of pressure trap models that include hydrodynamical disk-planet interactions and dust coagulation/fragmentation processes.

Abstract Copyright:

Journal keyword(s): protoplanetary disks - stars: pre-main sequence - submillimeter: stars

Simbad objects: 21

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