159 citations · 230 across the 4 of their papers we have counts for
7 papers
The molecular environment of the massive star forming region NGC 2024: Multi CO transition analysis
M. Emprechtinger, M. C. Wiedner, R. Simon +10
NGC 2024, a sites of massive star formation, have complex internal structures caused by cal heating by young stars, outflows, and stellar winds. These complex cloud structures lead…
The N2D+/N2H+ ratio as an evolutionary tracer of Class 0 protostars
M. Emprechtinger, P. Caselli, N. H. Volgenau +2
Deuterated ions are abundant in cold (T=10 K), dense (n=10^5 cm^-3) regions, in which CO is frozen out onto dust grains. In such environments, the deuterium fractionation of such i…
First observations with CONDOR, a 1.5 THz heterodyne receiver
M. C. Wiedner, G. Wieching, F. Bielau +15
The THz atmospheric windows centered at roughly 1.3 and 1.5~THz, contain numerous spectral lines of astronomical importance, including three high-J CO lines, the N+ line at 205 mic…
Probable detection of H2D+ in the starless core Barnard 68
M. R. Hogerheijde, P. Caselli, M. Emprechtinger +8
The presence of H2D+ in dense cloud cores underlies ion-molecule reactions that strongly enhance the deuterium fractionation of many molecular species. We determine the H2D+ abunda…
Photoionization models of roundish galactic planetary nebulae in the thick disk
M. Emprechtinger, T. Rauch, S. Kimeswenger
We present the result of photo-ionizing modelling of the three planetary nebulae (PNe) A 20, A 15 and MeWe 1-3. All three objects are roughly roundish, highly excited and have a hi…
Spectroscopic investigation of unstudied southern PNe
M. Emprechtinger, T. Forveille, S. Kimeswenger
We present a spectroscopic investigation of two hitherto unstudied galactic planetary nebulae (MeWe 1-10 and MeWe 1-11) and one candidate object (MeWe 2-5). The candidate object cl…