ASTRONOMY AND ASTROPHYSICS 13 CO(1–0) and 12 CO(2–1) in the center of the barred galaxy NGC 1530 Abstract. We present 13 CO(1–0) and 12 CO(2–1) aperture synthesis maps of the barred spiral galaxy NGC 1530. The angular resolutions are respectively 3 ′′ .1 and 1 ′′ .6. Both transitions show features similar to the 12 CO(1–0) map, with a nuclear feature (a ring or unresolved spiral arms) surrounde...

The ultraluminous infrared galaxy Arp 220 has been observed at resolution in CO (2È1) and 1 mm 0A.5 continuum using the newly expanded Owens Valley Millimeter Array. The CO and continuum peaks at the double nuclei and the surrounding molecular gas disk are clearly resolved. We Ðnd steep velocity gradients across each nucleus (*V D 500 km s~1 within whose directions are not aligned with r \ 0A.3...

We report imaging of CO (2–1) emission in the nucleus of M51 at 1 (47 pc) resolution. Molecular gas is ′′ found closely associated with the nuclear radio jet and the X-shaped dust absorption feature seen in the Hubble Space Telescope images. The CO emission lies along the side of the nuclear radio continuum “jet.” The strongest molecular emission is not symmetric in either position or velocity ...

We present searches for gas–phase CO2 features in the ISO–SWS infrared spectra of four deeply embedded massive young stars, which all show strong solid CO2 absorption. The abundance of gas–phase CO2 is at most 2: 10 7 with respect to H2, and is less than 5% of that in the solid phase. This is in strong contrast to CO, which is a factor of 10–100 more abundant in the gas than in solid form in th...

We present detections of the CO(J = 1–0) emission line in a sample of four massive star-forming galaxies at z ∼ 1.5 − 2.2 obtained with the Karl G. Jansky Very Large Array (VLA). Combining these observations with previous CO(2–1) and CO(3–2) detections of these galaxies, we study the excitation properties of the molecular gas in our sample sources. We find an average line brightness temperature...

We present searches for gas–phase CO2 features in the ISO–SWS infrared spectra of four deeply embedded massive young stars, which all show strong solid CO2 absorption. The abundance of gas–phase CO2 is at most 2: 10 7 with respect to H2, and is less than 5% of that in the solid phase. This is in strong contrast to CO, which is a factor of 10–100 more abundant in the gas than in solid form in th...

We present ∼ 2 resolution CO (3–2), HCO(4–3) and 880μm continuum images of the luminous infrared galaxy NGC 6240 obtained at the Submillimeter Array. We find that the spatially resolved CO (3–2), HCO(4–3) and the 880μm emission peaks between the two nuclear components that are both known to harbor AGNs. Our Large Velocity Gradient (LVG) analysis performed on each velocity channel suggests that ...

first-principle calculations were carried out to investigate the adsorption of co over cun nanoclusters. the structural, spectroscopic and electronic properties like optimized geometries, homo (highest occupied molecular orbital) and lumo (lowest unoccupied molecular orbital) energy levels, binding energy, adsorption energy, vibrational frequency and density of states (doss) of the pure cun nan...

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