Title: The ALMA Early Science View of FUor/EXor objects. III. The Slow and Wide Outflow of V883 Ori,
Abstract: We present Atacama Large Millimeter/ sub-millimeter Array (ALMA) observations
of V883 Ori, an FU Ori object. We describe the molecular outflow and envelope
of the system based on the $^{12}$CO and $^{13}$CO emissions, which together
trace a bipolar molecular outflow. The C$^{18}$O emission traces the rotational
motion of the circumstellar disk. From the $^{12}$CO blue-shifted emission, we
estimate a wide opening angle of $\sim$ 150$^{^{\circ}}$ for the outflow
cavities. Also, we find that the outflow is very slow (characteristic velocity
of only 0.65 km~s$^{-1}$), which is unique for an FU Ori object. We calculate
the kinematic properties of the outflow in the standard manner using the
$^{12}$CO and $^{13}$CO emissions. In addition, we present a P Cygni profile
observed in the high-resolution optical spectrum, evidence of a wind driven by
the accretion and being the cause for the particular morphology of the
outflows. We discuss the implications of our findings and the rise of these
slow outflows during and/or after the formation of a rotationally supported
disk.