Studies of deuterated isotopologues of complex organic molecules can provide important
constraints on their origin in star formation regions. In particular, the abundances of …

We carried out mapping observations toward three nearby molecular clouds, Orion A, Aquila
Rift, and M 17, using a new 100 GHz receiver, FOREST, on the Nobeyama 45 m telescope …

Context. Much attention has been placed on the dust distribution in protostellar envelopes,
but there are still many unanswered questions regarding the physico-chemical structure of …

Context. Ammonia and its deuterated isotopologues probe physical conditions in dense
molecular cloud cores. The time-dependence of deuterium fractionation and the relative …

Sun-like stars form from the contraction of cold and dense interstellar clouds. How the
collapse proceeds and what the main physical processes are driving it, however, is still …

We perform a virial analysis of starless dense cores in three nearby star-forming regions:
L1688 in Ophiuchus, NGC 1333 in Perseus, and B18 in Taurus. Our analysis takes …

We use the deuteration of cC 3 H 2 to probe the physical parameters of starless and
protostellar cores, related to their evolutionary states, and compare it to the N 2 H+ …

In this chapter, we explore the origins of cometary material and discuss the clues cometary
composition provides in the context of the origin of our solar system. The review focuses on …

In this work, we study deuterium fractionation in four starless cores in the low-mass star-
forming region L1688 in the Ophiuchus molecular cloud. We study how the deuterium …

Direct DH exchange in radicals is investigated in a quasi-uniform flow employing chirped-
pulse millimeter-wave spectroscopy. Inspired by the H-atom catalyzed isomerization of C 3 …