The outer rotation curve of the Milky Way

Preprint

5 December 1996

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9612060

Abstract

A straightforward determination of the circular-speed curve vc(R) of the Milky Way suggests that near the Sun, vc starts to rise approximately linearly with R. If this result were correct, the Galactic mass density would have to be independent of radius at R ~> R0. We show that the apparent linear rise in v_c arises naturally if the true circular-speed curve is about constant or gently falling at R0 < R ~< 2 R0, but most tracers that appear to be at R ~> 1.25 R0 are actually concentrated into a ring of radius ~1.6 R0.

Keywords

STRAIGHTFORWARD DETERMINATION
ROTATION CURVE
CIRCULAR SPEED
OUTER ROTATION
SPEED CURVE
V_C ARISES
CURVE VC
MILKY

All Related Versions

Version 1, 1996-12-05, ArXiv
Published version: Monthly Notices of the Royal Astronomical Society, 287 (1), L5.

This publication has 0 references indexed in Scilit: