262 citations · 3.1k across the 53 of their papers we have counts for
53 papers
Collisional excitation of NH3 by atomic and molecular hydrogen
N. Bouhafs, C. Rist, F. Daniel +4
We report extensive theoretical calculations on the rotation-inversion excitation of interstellar ammonia (NH3) due to collisions with atomic and molecular hydrogen (both para- and…
Deuteration of ammonia in the starless core Ophiuchus/H-MM1
Jorma Harju, Fabien Daniel, Olli Sipilä +13
Ammonia and its deuterated isotopologues probe physical conditions in dense molecular cloud cores. With the aim of testing the current understanding of the spin-state chemistry of…
NH and NNH towards the prestellar core 16293E in L1689N
F. Daniel, A. Faure, L. Pagani +6
Understanding the processes that could lead to enrichment of molecules in N atoms is of particular interest in order to shed light on the relatively large variations observe…
Collisional excitation of doubly and triply deuterated ammonia NDH and ND by H
F. Daniel, C. Rist, A. Faure +6
The availability of collisional rate coefficients is a prerequisite for an accurate interpretation of astrophysical observations, since the observed media often harbour densities w…
The NHD hyperfine structure revealed by astrophysical observations
F. Daniel, L. H. Coudert, A. Punanova +8
The 1-1 lines of ortho and para--NHD (o/p-NHD), respectively at 86 and 110 GHz, are commonly observed to provide constraints on the deuterium fractionation in…
Stratified NH and ND emission in the prestellar core 16293E in L1689N
A. Bacmann, F. Daniel, P. Caselli +6
High degrees of deuterium fractionation are commonly found in cold prestellar cores and in the envelopes around young protostars. As it brings strong constraints to chemical models…