Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..171s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 1, 1988, p. 171-185.
Astronomy and Astrophysics
Astrophysics
61
Galactic Nuclei, Gas Dynamics, Infrared Spectra, Ionized Gases, Milky Way Galaxy, Neon, Astronomical Models, Galactic Radiation, Line Spectra, Radial Velocity, Star Clusters, Star Distribution
Scientific paper
The forbidden Ne II 12.8 micron emission from the central 10 arcsec of the Galaxy has been observed with 1.5 arcsec resolution. The broad lines previously observed in this region are resolved into separate features associated with the filaments and knots of radio continuum emission present. The radial velocity varies rapidly and continuously with position along the filaments, with gradients of up to 30 km/s. The emission along the 'eastern arm' is mapped. The velocities are consistent with streams of gas orbiting about the center. A simple model of gravitationally dominated orbits fits the data; the masses estimated to lie within the orbits suggest the presence of a central mass of about 2.5 million solar. The implications of this model and possible objections to it are considered.
Bharat Ravi
Lacy John H.
Serabyn Eugen
Townes Charles H.
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