Long-period variables in the Large Magellanic Cloud. III - Evidence of a kinematic spheroidal population

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115767· OSTI ID:5759333

Hughes, S M.G.; Wood, P R; Reid, N ^[1]

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1. Anglo-Australian Observatory, Coonabarabran (Australia) Mount Stromlo and Siding Spring Observatories, Canberra (Australia) California Institute of Technology, Pasadena (USA)

The velocity dispersion of the old LPVs (33 km/s) indicates that they belong to a spheroid population. A rotational analysis of various disk populations of the LMC (H I, CO clouds, PN, CH stars, clusters, and LPVs) indicates that the transverse velocity of the LMC is about 200 km/s in the direction of the Magellanic Stream, that the dynamics of the LMC is dominated by a single rotating disk, and that all populations in the bar have solid-body rotation. The distribution of outer old LPV velocities implies a mass of the LMC of approximately equal to or less than 6.2 + or - 1.5 x 10 to the 9th solar masses. The old LPV population has a mass of 1.1 x 10 to the 8th solar masses, or about 2 percent of the LMC's total mass. 70 refs.

• OSTI ID: 5759333
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 101; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
DISTRIBUTION
DYNAMICS
FLUIDS
GALAXIES
GASES
MAGELLANIC CLOUDS
MASS
MATHEMATICAL MODELS
MECHANICS
MOTION
POPULATIONS
RADIAL VELOCITY
SPATIAL DISTRIBUTION
SPECTROPHOTOMETRY
STAR EVOLUTION
STARS
VARIABLE STARS
VELOCITY