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1992•The Astrophysical JournalRequires access

Rotation of the Galactic bulge

D. Minniti, Simon D. M. White, Edward W. Olszewski, John M. Hill

Open publisher page 42 citations

Abstract

Results are presented from spectroscopic observations of K giants in two fields towards the Galactic bulge. The mean Galacto-centric velocity and velocity dispersion for a field at l, b = (8, 7) are V = 45 +/- 10 km/s and sigma = 85 +/- 7 km/s. For a field at l, b = (12, 3), V = 77 +/- 9 km/s and sigma = 68 +/- 6 km/s. The bulge of the Galaxy is found to be rotating, and its velocity dispersion decreases with increasing Galacto-centric distance.

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What this paper is about

Results are presented from spectroscopic observations of K giants in two fields towards the Galactic bulge. The mean Galacto-centric velocity and velocity dispersion for a field at l, b = (8, 7) are V = 45 +/- 10 km/s and sigma = 85 +/- 7 km/s. For a field at l, b = (12, 3), V = 77 +/- 9 km/s and sigma = 68 +/- 6 km/s. The bulge of the Galaxy is found to be rotating, and its velocity dispersion decreases with increasing Galacto-centric distance.

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Available abstract

Results are presented from spectroscopic observations of K giants in two fields towards the Galactic bulge. The mean Galacto-centric velocity and velocity dispersion for a field at l, b = (8, 7) are V = 45 +/- 10 km/s and sigma = 85 +/- 7 km/s. For a field at l, b = (12, 3), V = 77 +/- 9 km/s and sigma = 68 +/- 6 km/s. The bulge of the Galaxy is found to be rotating, and its velocity dispersion decreases with increasing Galacto-centric distance.

Key concepts: Bulge, Physics, Astrophysics, Velocity dispersion, Galaxy, Milky Way, Spiral galaxy, Galaxy rotation curve

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