Other
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.8711c&link_type=abstract
American Astronomical Society Meeting 210, #87.11; Bulletin of the American Astronomical Society, Vol. 39, p.199
Other
Scientific paper
NGC 1333 IRAS 4A is a Class 0 protobinary. We observed the IRAS 4A1/2 system in the ammonia (2, 2) and (3, 3) lines using the Very Large Array. IRAS 4A was found to contain two disks with surprisingly dissimilar properties, one gas-rich and the other dusty. We found that the A2 disk is brighter in the ammonia lines but dimmer in the dust continuum than its sibling disk, with the gas-to-dust ratios different by about an order of magnitude. The gas-rich A2 disk may be unusually active or hot, as indicated by its association with water vapor masers. The existence of two very dissimilar disks in a binary system suggests that the formation process of multiple systems can be very different from that of single stars and that stars belonging to a multiple system do not necessarily evolve in phase with each other. Furthermore, planetary systems made in such environments can have diverse characters: gas-rich disks may favor the growth of gas-giants while dusty disks may be more productive of rocky planets.
Choi Minho
Kang Miju
Park Geumsook
Tatematsu Ken'ichi
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