Rotation of the galactic bulge

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

doi:10.1086/186448

Rotation of the galactic bulge

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

Astronomy

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26 Scopus citations

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 language	English (US)
Pages (from-to)	L47-L50
Journal	Astrophysical Journal
Volume	393
Issue number	2 PART II
DOIs	https://doi.org/10.1086/186448
State	Published - Jul 10 1992

Keywords

Galaxy: kinematics and dynamics
Galaxy: structure

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/186448

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@article{dbf921f0c5d740a58f3f7536ccde3d57,

title = "Rotation of the galactic bulge",

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.",

keywords = "Galaxy: kinematics and dynamics, Galaxy: structure",

author = "Dante Minniti and White, {Simon D.M.} and Olszewski, {Edward W.} and Hill, {John M.}",

year = "1992",

month = jul,

day = "10",

doi = "10.1086/186448",

language = "English (US)",

volume = "393",

pages = "L47--L50",

journal = "Astrophysical Journal",

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TY - JOUR

T1 - Rotation of the galactic bulge

AU - Minniti, Dante

AU - White, Simon D.M.

AU - Olszewski, Edward W.

AU - Hill, John M.

PY - 1992/7/10

Y1 - 1992/7/10

N2 - 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.

AB - 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.

KW - Galaxy: kinematics and dynamics

KW - Galaxy: structure

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U2 - 10.1086/186448

DO - 10.1086/186448

M3 - Article

AN - SCOPUS:0039063591

SN - 0004-637X

VL - 393

SP - L47-L50

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART II

ER -

Rotation of the galactic bulge

Abstract

Keywords

ASJC Scopus subject areas

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