Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...202...30b&link_type=abstract
Astrophysical Journal, vol. 202, Nov. 15, 1975, pt. 1, p. 30-49.
Astronomy and Astrophysics
Astrophysics
101
Carbon Monoxide, Galactic Structure, Interstellar Matter, Milky Way Galaxy, Stellar Radiation, Data Reduction, Density Distribution, Emission Spectra, Equators, Galactic Radiation, Galactic Rotation, Hydrogen, Velocity Distribution
Scientific paper
We observed the 2.6-mm line of CO at 5 deg longitude intervals along the galactic equator between 10 and 200 deg longitude with a velocity coverage sufficient to include all velocities expected in terms of differential galactic rotation. CO emission is generally observed at positive velocities (LSR) at less than 60 deg longitude up to the sub-central region terminal velocity. The spectra show considerable structure characterized by relatively small velocity dispersions of about 2 km/sec and antenna temperatures of 2 or 3 K. The characteristic appearance in the spectra of isolated features allowed us to make a rough estimate of the frequency of the occurrence of detected clumps of CO along the line of sight as 0.5/kpc. The observations show that 60 per cent of the CO emission observed originates between 4 and 8 kpc from the galactic center.
Bania Thomas M.
Burton William Butler
Gordon Mark A.
Lockman Felix J.
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