SIMBAD references

2019ApJ...885...87M - Astrophys. J., 885, 87-87 (2019/November-1)

The imprint of spiral arms on the galactic rotation curve.

McGAUGH S.S.

Abstract (from CDS):

We discuss a model for the Milky Way obtained by fitting the observed terminal velocities with the radial acceleration relation. The resulting stellar surface density profile departs from a smooth exponential disk, having bumps and wiggles that correspond to massive spiral arms. These features are used to estimate the term for the logarithmic density gradient in the Jeans equation, which turn out to have exactly the right location and amplitude to reconcile the apparent discrepancy between the stellar rotation curve and that of the interstellar gas. This model also predicts a gradually declining rotation curve outside the solar circle with slope -1.7 kms–1kpc–1, as subsequently observed.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy kinematics - Milky Way dynamics - Gravitation - Milky Way dark matter halo - the Milky Way - Milky Way disk - Milky Way mass - Milky Way rotation

VizieR on-line data: <Available at CDS (J/ApJ/885/87): table2.dat table3.dat>

Simbad objects: 5

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