Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19713208s&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #132.08; Bulletin of the American Astronomical Society, Vol. 33, p.718
Astronomy and Astrophysics
Astronomy
Scientific paper
We present milliarcsecond resolution observations of the central region at the heart of the massive bipolar outflow source, G192.16. Continuum emission at 7 mm wavelength obtained with the VLA and linked VLBA Pie Town Antenna provide a resolution of 40 x 30 mas and allow us to resolve the ionized gas and warm dust emission within 100 AU of the outflow engine. A geometric model of the emission structure provides evidence for the presence of a binary protostellar system with a projected separation of 80 AU. The southern protostar at the center of the outflow cone is surrounded by a thin accretion disk 130 AU in diameter. This is the first time that an inner accretion disk around a massive B star has been imaged directly. The disk diameter is roughly the size of our solar system. These observations provide strong evidence that protoplanetary disks may form around more luminous stars that are 5 to 10 times the mass of our sun.
Claussen Mark
Kurtz Stan
Shepherd Debra
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