MCMC chain of Milky Way gravitational potential models from McMillan (2017, MNRAS, 465, 76)

<p>These are the full MCMC chains used for the main suite of results from McMillan (2017, MNRAS, 465, 76). Each line gives the parameters of a single model, with some of its derived properties, and an associated weight (the number of steps that the chain stayed at&nbsp;this model). The parameters are described in the README file, and further detail can be found in the original paper.</p> <p>The disc density profiles are of the form</p> <p><span class="math-tex">\(\begin{equation} \rho_d(R,z)=\left\{\begin{array}{lc}\frac{\Sigma(R)}{2z_d}\,\textrm{exp}\left(\frac{-\mid z\mid}{z_d}\right) &amp; \textrm{for }z_d &gt; 0 \\ \frac{\Sigma(R)}{4(-z_d)}\,\textrm{sech}^2\left(\frac{z}{2\,z_d}\right) &amp; \textrm{for } z_d &lt; 0,\\\end{array}\right. \end{equation}\)</span></p> <p>where</p> <p><span class="math-tex">\(\begin{equation} \Sigma(R)=\Sigma_0\;\textrm{exp}\left(-\frac{R_0}{R}-\frac{R}{R_d}+ \epsilon\textrm{cos}\left(\frac{\pi R}{R_d}\right)\right), \end{equation} \)</span></p> <p>with parameters&nbsp;<span class="math-tex">\(\Sigma_0, R_d, z_d, R_0, \epsilon\)</span>&nbsp;(note that&nbsp;<span class="math-tex">\(R_0\)</span>&nbsp;here is not the position of the Sun, and that <span class="math-tex">\(\epsilon\)</span>&nbsp;is not used).</p> <p>Spheroids have&nbsp;</p> <p><span class="math-tex">\(\begin{equation} \rho_s=\frac{\rho_0}{(r^\prime/r_0)^\gamma(1+r^\prime/r_0)^{\beta-\gamma}}\; \textrm{exp}\left[-\left(r^\prime/r_{cut}\right)^2\right], \end{equation} \)</span></p> <p>where</p> <p><span class="math-tex">\(\begin{equation} r^\prime = \sqrt{R^2 + (z/q)^2} \end{equation} \)</span></p> <p>with parameters&nbsp;<span class="math-tex">\( \rho_0, q, \gamma, \beta, r_0, r_{cut}\)</span>&nbsp;(note that&nbsp;<span class="math-tex">\(r_0\)</span>&nbsp;is different&nbsp;again)</p>