78 citations · 408 across the 17 of their papers we have counts for
8 papers · 1 filter
Combined model for , , and spin-state chemistry in molecular clouds
O. Sipilä, L. Colzi, E. Roueff +3
We present a new gas-grain chemical model for the combined isotopic fractionation of carbon and nitrogen in molecular clouds, in which the isotope chemistry of carbon and nitrogen…
Similar levels of deuteration in the pre-stellar core L1544 and the protostellar core HH211
K. Giers, S. Spezzano, P. Caselli +6
In the centre of pre-stellar cores, deuterium fractionation is enhanced due to the low temperatures and high densities. Therefore, the chemistry of deuterated molecules can be used…
A Search for O_2 in CO-depleted Molecular Cloud Cores with Herschel
Eva S. Wirström, Steven B. Charnley, Martin A. Cordiner +1
The general lack of molecular oxygen in molecular clouds is an outstanding problem in astrochemistry. Extensive searches with SWAS, Odin and Herschel have only produced two detecti…
On the nature of the enigmatic object IRAS 19312+1950: A rare phase of massive star formation?
M. A. Cordiner, A. C. A. Boogert, S. B. Charnley +7
IRAS 19312+1950 is a peculiar object that has eluded firm characterization since its discovery, with combined maser properties similar to an evolved star and a young stellar object…
Ortho-to-para ratio of NH2. Herschel-HIFI observations of ortho- and para-NH2 rotational transitions towards W31C, W49N, W51 and G34.3+0.1
C. M. Persson, A. O. H. Olofsson, R. Le Gal +10
We have used the Herschel-HIFI instrument to observe both nuclear spin symmetries of amidogen (NH2) towards the high-mass star-forming regions W31C (G10.6-0.4), W49N (G43.2-0.1), W…
Upper limits to interstellar NH+ and para-NH2- abundances. Herschel-HIFI observations towards Sgr B2 (M) and G10.6-0.4 (W31C)
C. M. Persson, M. Hajigholi, G. E. Hassel +12
The understanding of interstellar nitrogen chemistry has improved significantly with recent results from the Herschel Space Observatory. To set even better constraints, we report h…
On the ubiquity of molecular anions in the dense interstellar medium
M. A. Cordiner, J. V. Buckle, E. S. Wirström +2
Results are presented from a survey for molecular anions in seven nearby Galactic star-forming cores and molecular clouds. The hydrocarbon anion C6H- is detected in all seven targe…
Organic chemistry of low-mass star-forming cores I: 7 mm spectroscopy of Chamaeleon MMS1
Martin A. Cordiner, Steven B. Charnley, Eva S. Wirström +1
Observations are presented of emission lines from organic molecules at frequencies 32 - 50 GHz in the vicinity of Chamaeleon MMS1. This chemically-rich dense cloud core habours an…