Figure 9 from The Structure and Metallicity Gradient in the Extreme Outer Disk of NGC 7793

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The Structure and Metallicity Gradient in the Extreme Outer Disk of NGC 7793

Authors: M. Vlajić, J. Bland-Hawthorn, and K. C. Freeman

Vlajić, Bland-Hawthorn, & Freeman 2011 The Astrophysical Journal 732 7.

Provider: AAS Journals

Caption: Figure 9.

(a) Logarithm of surface density in the outer disk of NGC 7793. Filled circles are data from Puche et al. (1990); the solid line is a linear fit to these data points. (b) Same as (a), but for rotational velocity. (c) Epicyclic frequency derived from the velocity curve in (b). (d) Surface density. (e) Toomre Q parameter.

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