Michael Dumke

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We present detailed observations of the 1.2mm continuum and the CO line emission in the exceptional starburst/active galaxy NGC 3079 with the IRAM 30-m telescope. The 1.2mm thermal dust emission is much less centrally concentrated than the CO or radio continuum. Roughly 10% of the total 1.2mm flux comes from the central 11′′ as opposed to ∼ 40% for the CO(More)
Aims. The purpose of this study is to examine the prediction that the deuterated H+3 ion, H2D , can be found exclusively in the coldest regions of molecular cloud cores. This is also a feasibility study for the detection of the ground-state line of ortho-H2D at 372 GHz with APEX. Methods. The (110 → 111) transition of H2D at 372 GHz was searched towards(More)
In this paper we present new observations of the interstellar medium in the non-interacting edge-on galaxy NGC5907. We have observed the J = 2 − 1 and J = 1 − 0 lines of the 12CO molecule and radio continuum emission at λ 1.2mm. The distribution of the molecular gas (as traced by CO) shows amaximum in the central region and a ring or spiral armat r ∼ 7 kpc.(More)
We observed the nearby early-type spiral galaxy NGC 4594 (M 104, Sombrero galaxy) with the Very Large Array at 4.86 GHz, with the Effelsberg 100-m telescope at 8.35 GHz as well as with the Heinrich Hertz Telescope at 345 GHz in radio continuum. The 4.86 and 8.35 GHz data contain polarization information and hence information about the magnetic fields: we(More)
We have mapped the CO(3–2) line emission from several nearby galaxies, using the Heinrich-HertzTelescope on Mt. Graham, Arizona. Unlike earlier observations, our investigation is not restricted to starburst galaxies, but includes twelve galaxies of various types and in different stages of star forming activity. Furthermore, we have not only observed the(More)
We use the radiation transfer simulation of Xilouris et al. (1999) to constrain the quantity of dust in three nearby spiral galaxies (NGC 4013, NGC 5907 and NGC 4565). The predicted visual optical depth from the model is compared with the thermal continuum radiation detected from NGC 4013 and NGC 5907 at 850 μm and from NGC 4565 at 1.2 mm. The former is(More)