80 citations · 235 across the 6 of their papers we have counts for
9 papers
The Central 1000 au of a Pre-stellar Core Revealed with ALMA. II. Almost Complete Freeze-out
Paola Caselli, Jaime E. Pineda, Olli Sipilä +18
Pre-stellar cores represent the initial conditions in the process of star and planet formation. Their low temperatures (10 K) allow the formation of thick icy dust mantles, whic…
The chemical structure of young high-mass star-forming clumps: (II) parsec-scale CO depletion and deuterium fraction of
S. Feng, D. Li, P. Caselli +19
The physical and chemical properties of cold and dense molecular clouds are key to understanding how stars form. Using the IRAM 30 m and NRO 45 m telescopes, we carried out a Multi…
First detection of NHD and ND in the interstellar medium
M. Melosso, L. Bizzocchi, O. Sipilä +7
Deuterium fractionation processes in the interstellar medium (ISM) have been shown to be highly efficient in the family of nitrogen hydrides. To date, observations were limited to…
Modeling deuterium chemistry in starless cores: full scrambling versus proton hop
O. Sipilä, P. Caselli, J. Harju
We constructed two new models for deuterium and spin-state chemistry for the purpose of modeling the low-temperature environment prevailing in starless and pre-stellar cores. The f…
The chemical structure of young high-mass star-forming clumps: (I) Deuteration
S. Feng, P. Caselli, K. Wang +3
The chemical structure of high-mass star nurseries is important for a general understanding of star formation. Deuteration is a key chemical process in the earliest stages of star…
Why does ammonia not freeze out in the center of pre-stellar cores?
O. Sipilä, P. Caselli, E. Redaelli +2
We carried out a parameter-space exploration of the ammonia abundance in the pre-stellar core L1544, where it has been observed to increase toward the center of the core with no si…