1978•The Astrophysical JournalRequires access

Determination of the spiral pattern speed of the galaxy

M. A. Gordon

Abstract

The carbon monoxide abundance as a function of galactocentric radius, in conjunction with a newly determined galactic rotation curve, gives a spiral pattern speed of 11.5 + or - 1.5 km/sec per kpc. This value is based upon the assumption that the inner Lindblad resonance occurs where the CO abundance exhibits a sharp discontinuity, at a radius of 4 kpc.

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Key concepts: Physics, Astrophysics, Spiral galaxy, Galaxy, Galaxy rotation curve, Astronomy, Interacting galaxy, Milky Way