Deuterated Formaldehyde in the low mass protostar HH212
  HH212, a nearby (400 pc) object in Orion, is a Class 0 protostellar system
with a Keplerian disk and collimated bipolar SiO jets. Deuterated water, HDO
and a deuterated complex molecule, methanol (CH2DOH) have been reported in the
source. Here, we report the HDCO (deuterated formaldehyde) line observation
from ALMA data to probe the inner region of HH212. We compare HDCO line with
other molecular lines to understand the possible chemistry and physics of the
source. The distribution of HDCO emission suggests it may be associated with
the base of the outflow. The emission also shows a rotation but it is not
associated with the Keplerian rotation of disk or the rotating infalling
envelope, rather it is associated with the outflow as previously seen in C 34
S. From the possible deuterium fractionation, we speculate that the gas phase
formation of deuterated formaldehyde is active in the central hot region of the
low-mass protostar system, HH212.
