Aims. We present new radio observations of two regions of the spiral galaxy NGC 3627, including new radio continuum observations at 1.4 GHz with the Very Large Array, and also new observations in the CO line, taken with the Plateau de Bure interferometer. Comparing these observations with archival Spitzer and H α data we study the correlation of the radio continuum (RC), infrared-8µm, and CO em...

We present a molecular line scan in the Hubble Deep Field North (HDF–N) that covers the entire 3mm window (79–115 GHz) using the IRAM Plateau de Bure Interferometer. Our CO redshift coverage spans z ∼ 0.45, 1 ∼ z ∼ 1.9 and all z ∼ 2. We reach a CO detection limit that is deep enough to detect essentially all z > 1 CO lines reported in the literature so far. We have developed and applied differe...

We present high spatial resolution (0.4 arcsec, 3.5 kpc) Plateau de Bure Interferometer interferometric data on three ultraluminous infrared galaxies (ULIRGs) at z ∼ 2: two submillimetre galaxies (SMGs) and one submillimetre faint star-forming radio galaxy. The three galaxies have been robustly detected in CO rotational transitions, either 12CO (J = 4→3) or 12CO (J = 3→2), allowing their sizes ...

We present new IRAM Plateau de Bure interferometer (PdBI) 1.3 mm continuum observations at ∼1.5′′ resolution of 28 submillimeter galaxies (SMGs), previously discovered with the 870 μm bolometer LABOCA at the APEX telescope from the central 0.7 deg2 of the COSMOS field. Nineteen out of the 28 LABOCA sources were detected with PdBI at a >∼3σ level of ≈1.4 mJy/beam. A combined analysis of this new...

High-redshift, dust-obscured galaxies, selected to be luminous in the radio but relatively faint at 850 m, appear to represent a different population from the ultraluminous submillimeter-bright population. They may be star-forming galaxies with hotter dust temperatures, or they may have lower far-infrared luminosities and larger contributions from obscured active galactic nuclei (AGNs). Here we...

Molecular line CN, CS and mm continuum observations of two intermediate-to high-mass star-forming regions – IRAS 20293+3952 and IRAS 19410+2336 – obtained with the Plateau de Bure Interferometer at high spatial resolution reveal interesting characteristics of the gas and dust emission. In spite of the expectation that the CN and CS morphology might closely follow the dense gas traced by the dus...

We present new high-sensitivity high-resolution mm-wave observations of the Onsala 1 ultra-compact HII region that bring to light the internal structure of this massive star forming cloud. The 1.2mm continuum map obtained with the IRAM 30-m radiotelescope (∼11′′ resolution) shows a centrally peaked condensation of 1′ size (∼0.5 pc at the assumed distance of 1.8 kpc) which has been further inves...

Context. Far-UV photons strongly affect the physical and chemical state of molecular gas in the vicinity of young massive stars. Aims. Finding molecular tracers of the presence of FUV radiation fields in the millimeter wavelength domain is desirable, because IR diagnostics (PAHs for instance) are not easily accessible towards high extinction line-of-sights. Furthermore, gas phase diagnostics pr...

Context. Star formation efficiency (SFE) theories are currently based on statistical distributions of turbulent cloud structures and a simple model of star formation from cores. They remain poorly tested, especially at the highest densities. Aims. We investigate the effects of gas density on the SFE through measurements of the core formation efficiency (CFE). With a total mass of ∼2 × 104 M , t...

Aims. As a part of the CALYPSO Large Program, we aim to constrain properties protostellar jets and outflows by searching for corresponding emission in sample 21 Class 0 protostars covering broad range internal luminosities ( L int from 0.035 ? 47 ). Methods. We analyzed high angular (~0.??5–1.??0) resolution IRAM Plateau de Bure Interferometer (PdBI) observations three typical outflow jet trace...