Mass models of the Milky Way

Details Mass models of the Milky Way Mass models of the Milky Way

1996-12-05

arxiv.org/abs/astro-ph/9612059v2

Mon.Not.Roy.Astron.Soc.294:429,1998

Astronomy and Astrophysics

Astrophysics

10 pages, LaTeX, mn.sty, 5 .ps figures, accepted by MNRAS major revision involving new cepheid & hipparcos data

Scientific paper

10.1046/j.1365-8711.1998.01282.x

A parameterized model of the mass distribution within the Milky Way is fitted to the available observational constraints. The most important single parameter is the ratio of the scale length R_d* of the stellar disk to R0. The disk and bulge dominate v_c(R) at R> R0. For example, changing the disk slightly from an exponential surface-density profile significantly changes the form of v_c(R) at R >> R0, where the disk makes a negligible contribution to v_c. Moreover, minor changes in the constraints can cause the halo to develop a deep hole at its centre that is not physically plausible. These problems call into question the proposition that flat rotation curves arise because galaxies have physically distinct halos rather than outwards-increasing mass-to-light ratios. The mass distribution of the Galaxy and the relative importance of its various components will remain very uncertain until more observational data can be used to constrain mass models. Data that constrain the Galactic force field at z > R and at R > R0 are especially important.

Affiliated with

Also associated with

No associations

Rating

Mass models of the Milky Way does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Mass models of the Milky Way, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass models of the Milky Way will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-242815