Determination of the spiral pattern speed of the galaxy

Details Determination of the spiral pattern speed of the galaxy Determination of the spiral pattern speed of the galaxy

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..100g&link_type=abstract

Astrophysical Journal, Part 1, vol. 222, May 15, 1978, p. 100-102.

Astronomy and Astrophysics

Astrophysics

13

Angular Velocity, Galactic Rotation, Milky Way Galaxy, Spiral Galaxies, Abundance, Carbon Monoxide, Interstellar Matter, Molecular Gases

Scientific paper

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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