The Circumstellar Environment of the Fu Orionis Pre-outburst Candidate V1331 Cygni
نویسنده
چکیده
High resolution ( 4") aperture synthesis maps of the CO (1 .... 0), 13CO (1 .... 0), 13CO ( 2 .... 1), and associated continuum emission from the FU Orionis candidate V1331 Cygni reveal a massive, 0.5±0.1510 , circumstellar disk surrounded by a flattened gaseous envelope, 6000X4400 AU in size, mass ;;.0.3210 . These images and lower resolution measurements also trace a bipolar outflow and gaseous ring, 4.1 by 2.8X 104 AU, mass ;;.0.0710 , radially expanding at 22±4 km s-1• We suggest this ring is a swept-up gaseous torus from an energetic mass ejection stage, possibly an FU Orionis outburst or outbursts, -4X 103 yr ago that imparted ;;.1045 ergs into the ambient cloud.
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