Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-08-08
Astronomy and Astrophysics
Astrophysics
Scientific paper
10.1086/522116
The NGC 1333 IRAS 4A protobinary was observed in the ammonia (2, 2) and (3, 3) lines and in the 1.3 cm continuum with a high resolution (about 1.0 arcsec). The ammonia maps show two compact sources, one for each protostar, and they are probably protostellar accretion disks. The disk associated with IRAS 4A2 is seen nearly edge-on and shows an indication of rotation. The A2 disk is brighter in the ammonia lines but dimmer in the dust continuum than its sibling disk, with the ammonia-to-dust flux ratios different by about an order of magnitude. This difference suggests that the twin disks have surprisingly dissimilar characters, one gas-rich and the other dusty. The 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 has a controlling agent lacking in the isolated star formation process and that stars belonging to a multiple system do not necessarily evolve in phase with each other.
Choi Minho
Kang Miju
Park Geumsook
Tatematsu Ken'ichi
No associations
LandOfFree
Ammonia Imaging of the Disks in the NGC 1333 IRAS 4A Protobinary System does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ammonia Imaging of the Disks in the NGC 1333 IRAS 4A Protobinary System, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ammonia Imaging of the Disks in the NGC 1333 IRAS 4A Protobinary System will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-215383