We report the detection of CN(N=3→2) emission towards the Cloverleaf quasar (z = 2.56) based on observations with the IRAM Plateau de Bure Interferometer. This is the first clear detection of emission from this radical at high redshift. CN emission is a tracer of dense molecular hydrogen gas (n(H2) > 10 4 cm) within star–forming molecular clouds, in particular in regions where the clouds are af...

We present millimetre and submillimetre observations of comet C/1995 O1 (Hale-Bopp) undertaken near perihelion with the Caltech Submillimeter Observatory and the 30m telescope and Plateau-de-Bure interferometer of the Institut de Radioastronomie Millimétrique. From a spectral molecular survey, six new cometary molecular species have been identified for the first time in a comet: SO, SO2, HC3N, ...

We report the detection of CO(3–2) emission from a bright, gravitationally lensed Lyman Break Galaxy, LBGJ213512.73–010143 (the “Cosmic Eye”), at z = 3.07 using the Plateau de Bure Interferometer. This is only the second detection of molecular gas emission from an LBG and yields an intrinsic molecular gas mass of (2.4 ± 0.4) × 10M⊙. The lens reconstruction of the UV morphology of the LBG indica...

Small hydrocarbons, such as C2H, C3H and C3H2 are more abundant in photo-dissociation regions (PDRs) than expected based on gas-phase chemical models. To explore the hydrocarbon chemistry further, we observed a key intermediate species, the hydrocarbon ion l-C3H , in the Horsehead PDR with the Plateau de Bure Interferometer at high-angular resolution (6). We compare with previous observations o...

We present millimeter interferometric observations of the young stellar object SVS13 in NCG1333 in the N2H + (1–0) line and at 1.4 and 3mm dust continuum, using the IRAM Plateau de Bure interferometer. The results are complemented by infrared data from the Spitzer Space Telescope. The millimeter dust continuum images resolve four sources (A, B, C, and VLA3) in SVS13. With the dust continuum ima...

We present high spatial resolution observations of HCO+ (J=1–0), SO (J=22–11), H13CN (J=1–0), SiO (v = 1, J = 2–1), and the continuum at 3 mm from OH 231.8+4.2, taken with the IRAM interferometer at Plateau de Bure. We also report the first detection of NS in circumstellar envelopes. The overall distribution of the emission of all molecules (except for HCO+ and the SiO maser) is similar to that...

We present the results of a multi-line and continuum study towards the source IRAS 23385+6053 performed with the IRAM-30m telescope, the Plateau de Bure Interferometer, the Very Large Array Interferometer and the James Clerk Maxwell Telescope. We have obtained single-dish maps in the C The new results confirm our earlier findings, namely that IRAS 23385+6053 is a good candidate high-mass protos...

Aims. We study the fragmentation and collapse properties of the dense gas during the onset of high-mass star formation. Methods. We observed the massive (∼800 M ) starless gas clump IRDC 18310-4 with the Plateau de Bure Interferometer (PdBI) at subarcsecond resolution in the 1.07 mm continuum and N2H(3–2) line emission. Results. Zooming from a single-dish low-resolution map to previous 3 mm PdB...

OBJECTIVE To compare HIV-related sexual risk behavior among temporary rural to urban migrants and non-migrants and to explore the role of migration in HIV transmission in a rural area of Ethiopia. METHODS A cross-sectional comparative study was conducted in Bure Woreda, West Gojam, Amhara Region, Ethiopia. A total of 1,310 male subjects (655 rural to urban migrants and 655 non-migrants) were ...

Context. Previous molecular gas observations at arcsecond-scale resolution of the Seyfert 2 galaxy M51 suggest the presence of a dense circumnuclear rotating disk, which may be the reservoir for fueling the active nucleus and obscures it from direct view in the optical. However, our recent interferometric CO(3-2) observations show a hint of a velocity gradient perpendicular to the rotating disk...