SPECTRAL LINE SURVEY TOWARD THE YOUNG MASSIVE PROTOSTAR NGC 2264 CMM3 IN THE 4 mm, 3 mm, AND 0.8 mm BANDS

Mm - wave HCO + , HCN and CO absorption toward NGC 1052

We used the Plateau de Bure Interferometer to observe λ3mm J=1-0 absorption lines of HCO + , HCN and CO toward the core of the nearby elliptical, megamaser-host galaxy NGC1052. The lines are relatively weak, with peak optical depths 0.03 for HCO + and HCN and 0.1 for CO. Nonetheless the inferred column density of molecular gas 2N(H2) ≃ 5×10 21 cm −2 is consistent with the degree of reddening in...

Mm Mm^ Fl

Imaging chemical differentiation around the low-mass protostar L483-mm

This paper presents a millimeter wavelength aperture-synthesis study of the spatial variations of the chemistry in the envelope around the deeply embedded low-mass protostar L483-mm on ∼1000 AU (5) scales. Lines of 8 molecular species including CN, CO, CS, CS, HCN, HCN, HCO and N2H + have been observed using the Owens Valley Radio Observatory Millimeter Array. Continuum emission at 2.7-3.4 mill...

APEX 1 mm line survey of the Orion Bar

Context. Unbiased molecular line surveys are a powerful tool for analyzing the physical and chemical parameters of astronomical objects and are the only means for obtaining a complete view of the molecular inventory for a given source. The present work stands for the first such investigation of a photon-dominated region. Aims. The first results of an ongoing millimeter-wave survey obtained towa...

Comparison of 3 mm versus 4 mm rigid endoscope in diagnostic nasal endoscopy☆

Objective Compare nasal endoscopy with 3 mm versus conventional 4 mm rigid 30° endoscopes for visualization, patient comfort, and examiner ease. Methods Ten adults with no previous sinus surgery underwent bilateral nasal endoscopy with both 4 mm and 3 mm endoscopes (resulting in 20 paired nasal endoscopies). Visualization, patient discomfort and examiner's difficulty were assessed with every ...