Molecular CloudsRadio AstronomyAbsorption SpectraCentimeter WavesFirst results are presented from a large-scale survey of OH in the galactic center carried out at Jodrell Bank. The observations sample the region where l is less than or equal to 8.6 deg and greater than or equal to -6.0 deg and...
These clouds do not show any specific, systematic behavior in their velocity field, except for a small gradient along galactic longitude (for A–E). The brightest 12CO and 13CO emissions are detected toward cloud A, which is located farthest from the two main clouds. We found star formation...
We present results of a HCN J=1-0 mapping survey of molecular clouds toward the Galactic Center (GC) region of -1.6≤ l ≤ 2and -0.23≤ b ≤ 0.30with 2' grid resolution. The HCN emissions show similar distribution and velocity structures to those of the HCN emissions, but are found ...
We enumerate the major surveys of CO emission along the Galactic plane and summarize the various approaches that leverage these data to determine the large-scale distribution of molecular gas: its radial and vertical distributions, its concentration into clouds, and its relationship to spiral structure...
The velocity field of the gas is highly chaotic, with some clouds having large (>100 km s-1) departures from the velocity pattern expected from purely circular orbits; however, most of the gas (70%) lies in a thin sheet in the Galactic plane. The rotation curve of the gas varies from...
THE PHYSICS AND CHEMISTRY OF SMALL MOLECULAR CLOUDS IN THE GALACTIC PLANE. HI. NH_3 (2, 2) lines of NH_3 in all 27 of the Clemens-Barvainis small molecular clouds for which several structural models including hydrostatic equilibrium ... BE Turner - 《Astrophysical Journal》 被引量: 0发表...
1e-9 for the SiO clouds and 1e-10 for the other molecular clouds in the GC. The characteristics (size and H2 densities) of the SiO emission in the GC are completely different from those observed in the Galactic disk, where the SiO emission arises from much smaller regions with larger ...
Molecular clouds and star formation in the inner galaxy - A comparison of CO, H II, and far-infrared surveys The authors have compared surveys of the galactic plane over -1°≤ b ≤ 1°, 12° ≤ l ≤ 60°, in the CO line at 2.6 mm, in the far-infrared (FIR) contin... Myers...
This implies that the HCN emission lines are notcontaminated by foreground or background gas components. Therefore HCN data areparticularly useful in investigating the structures of molecular clouds in theGalactic Center. The $\\Delta V$s (FWHMs) of the most of the detected lines arefound to ...
Molecular clouds in a polar ring 来自 Semantic Scholar 喜欢 0 阅读量: 18 作者:F Combes,J Braine,F Casoli,M Gerin,WV Driel 摘要: We have detected CO emission from the polar ring out of the plane of the SBa spiral NGC 660. We infer a total H2 mass in the polar ring (of radius ...