Tidal radii of globular clusters and the mass of the Milky Way

Details Tidal radii of globular clusters and the mass of the Milky Way Tidal radii of globular clusters and the mass of the Milky Way

2003-09-11

arxiv.org/abs/astro-ph/0309312v1

Mon.Not.Roy.Astron.Soc.347:119,2004

Astronomy and Astrophysics

Astrophysics

LaTex. 6 pages, 2 .ps figures. Accepted for publication by MNRAS

Scientific paper

10.1111/j.1365-2966.2004.07181.x

Tidal radii of remote globular clusters (R_{GC}>= 35 kpc) are used to provide constraints of the mass profile of the Milky Way galaxy that are independent of kinematic data. The available data are consistent with the profile of an isothermal sphere with circular velocity V_c = 220 +/- 40 km/s in the radial range 35 kpc < R_{GC} < 100 kpc, in good agreement with all recent estimates. The more robust constraint at large distances from the galactic center is provided by NGC 2419, yelding an enclosed mass of ~ 1.3 (+2.9/-1.0) * 10**12 M_{sun} at R_{GC}= 90 kpc.

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