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Nuclear spin ratios of deuterated ammonia in prestellar cores. LAsMA observations of H-MM1 and Oph D
Jorma Harju, Jaime E. Pineda, Olli Sipilä +6
We determine the ortho/para ratios of NH2D and NHD2 in two dense, starless cores, where their formation is supposed to be dominated by gas-phase reactions, which, in turn, is predi…
Shocking Sgr B2(N1) with its own outflow: A new perspective on segregation between O- and N-bearing molecules
Laura A. Busch, Arnaud Belloche, Robin T. Garrod +2
We want to investigate the influence of the powerful outflow driven by the hot core Sgr B2(N1) on the gas molecular inventory of the surrounding medium. We used the data taken as p…
Protonated hydrogen cyanide as a tracer of pristine molecular gas
Y. Gong, F. J. Du, C. Henkel +11
Protonated hydrogen cyanide, HCNH, plays a fundamental role in astrochemistry because it is an intermediary in gas-phase ion-neutral reactions within cold molecular clouds. H…
Rotation-tunneling spectrum and astrochemical modeling of dimethylamine, CHNHCH, and searches for it in space
H. S. P. Müller, R. T. Garrod, A. Belloche +6
Methylamine has been the only simple alkylamine detected in the interstellar medium for a long time. With the recent secure and tentative detections of vinylamine and ethylamine, r…
The Effelsberg survey of FU~Orionis and EX~Lupi objects II. -- HO maser observations
Zs. M. Szabó, Y. Gong, W. Yang +7
FU Orionis (FUor) and EX Lupi (EXor) type objects are two groups of peculiar and rare pre-main sequence low-mass stars that are undergoing powerful accretion outbursts during their…
The Effelsberg survey of FU Orionis and EX Lupi objects I. -- Host environments of FUors/EXors traced by NH
Zs. M. Szabó, Y. Gong, K. M. Menten +6
FU Orionis (FUor) and EX Lupi (EXor) type objects represent two small, but rather spectacular groups of low-mass, young eruptive stars. Outbursts of several magnitudes are observed…