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Submillimeter Polarimetry with PolKa, a reflection-type modulator for the APEX telescope
Helmut Wiesemeyer, Talayeh Hezareh, Ernst Kreysa +6
Imaging polarimetry is an important tool for the study of cosmic magnetic fields. In our Galaxy, polarization levels of a few up to 10\% are measured in the submillimeter dus…
APEX observations of supernova remnants - I. Non-stationary MHD-shocks in W44
S. Anderl, A. Gusdorf, R. Güsten
Aims. The interaction of supernova remnants (SNRs) with molecular clouds gives rise to strong molecular emission in the far-IR and sub-mm wavelength regimes. The application of MHD…
ATLASGAL-selected massive clumps in the inner Galaxy: I. CO depletion and isotopic ratios
A. Giannetti, F. Wyrowski, J. Brand +8
In the low-mass regime, it is found that the gas-phase abundances of C-bearing molecules in cold starless cores rapidly decrease with increasing density, as the molecules form mant…
The molecular emission from old supernova remnants
Antoine Gusdorf, Rolf Guesten, Sibylle Anderl +1
Supernovae constitute a critical source of energy input to the interstellar medium (ISM). In this short review, we focus on their latest phase of evolution, the supernova remnants…
Hydrogen Fluoride toward Luminous Nearby Galaxies: NGC 253 and NGC 4945
R. R. Monje, S. Lord, E. Falgarone +4
We present the detection of hydrogen fluoride, HF, in two luminous nearby galaxies NGC 253 and NGC 4945 using the Heterodyne Instrument for the Far-Infrared (HIFI) on board the Her…
Dense Gas Tracers and Star Formation Laws in Active Galaxies: APEX Survey of HCN J=4-3, HCO+ J=4-3, and CS J=7-6
Zhi-Yu Zhang, Yu Gao, Christian Henkel +4
We report HCN J=4-3, HCO+ J=4-3, and CS J=7-6 observations in 20 nearby star-forming galaxies with the Acatama Pathfinder EXperiment 12-m telescope. Combined with 4 HCN, 3 HCO+, an…