159 citations · 331 across the 7 of their papers we have counts for
6 papers · 1 filter
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…
Submillimeter Line Emission from LMC N159W: a Dense, Clumpy PDR in a Low Metallicity Environment
J. L. Pineda, N. Mizuno, J. Stutzki +30
Star formation at earlier cosmological times takes place in an interstellar medium with low metallicity. The Large Magellanic Cloud (LMC) is ideally suited to study star formation…
12CO 4-3 and [CI] 1-0 at the centers of NGC 4945 and Circinus
M. Hitschfeld, M. Aravena, C. Kramer +30
Studying molecular gas in the central regions of the star burst galaxies NGC4945 and Circinus enables us to characterize the physical conditions and compare them to previous local…
Clumpy photon-dominated regions in Carina. I. [CI] and mid-J CO lines in two 4'x4' fields
C. Kramer, M. Cubick, M. Roellig +31
The Carina region is an excellent astrophysical laboratory for studying the feedback mechanisms of newly born, very massive stars within their natal giant molecular clouds (GMCs) a…
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…