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Published February 15, 1973 | Published
Journal Article Open

Survey of Molecular Lines Near the Galactic Center. III. 6-Centimeter Formaldehyde Absorption at b = -2' from ℓ = 2°.0 to ℓ = 4°.5 and at b = -12' from ℓ = 358°.5 to ℓ = 2°.0

Abstract

Our initial survey in the 6-cm transition of formaldehyde near the galactic plane (b = -2') has been extended out to ℓ = 4°.5, and a parallel strip at b = -12' has been mapped between ℓ = 358°.5 and 2°.0. These new observations suggest that the group of dense, low-positive-velocity clouds does not continue beyond ℓ = 2° and that the negative-velocity clouds are part of an arm structure within 300 pc of the galactic center and having a total mass of ~10^6 M_⊙. We also note the existence of molecular gas at ℓ = 2°.3 with a velocity of 240 km s^(-1) (similar to that of H I in the rotating nuclear disk).

Additional Information

© 1973. The American Astronomical Society.

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August 19, 2023
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