Rotation of the galactic bulge

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

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Abstract

We present results from spectroscopic observations of K giants in two fields towards the Galactic bulge. The mean Galactocentric velocity and velocity dispersion for a field at l, b = (8, 7) are 〈V〉 = 45 ± 10 km s-1 and σ = 85 ± 7 km s-1. For a field at l, b = (12, 3) we find 〈V〉 = 77 ± 9 km s-1 and σ = 68 ± 6 km s-1. The bulge of the Galaxy is found to be rotating, and its velocity dispersion decreases with increasing Galactocentric distance.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume393
Issue number2 PART II
Publication statusPublished - Jul 10 1992

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Keywords

  • Galaxy: kinematics and dynamics
  • Galaxy: structure

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Minniti, D., White, S. D. M., Olszewski, E. W., & Hill, J. M. (1992). Rotation of the galactic bulge. Astrophysical Journal, 393(2 PART II).