The Effect of Tidal Stripping on Composite Stellar Populations in Dwarf Spheroidal Galaxies

<table>Final projected view (arbitrary units) of the dark matter (black), metal poor (blue) and metal rich (red) stellar components for the models evolved in orbits 1–4 during <svg height="11.225" id="M106" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 33.5 11.225" width="33.5" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,10.963)"><path d="M324 430l-26 -36l-112 -4l-55 -265q-13 -66 7 -66q13 0 44.5 20t50.5 40l17 -24q-38 -40 -85.5 -73.5t-87.5 -33.5q-50 0 -21 138l55 262h-80l-2 8l25 34h66l25 99l78 63l10 -9l-37 -153h128z" id="x1D461"></path></g><g transform="matrix(.017,-0,0,-.017,10.568,10.963)"><path d="M548 311q-21 -57 -59 -94t-89 -37q-53 0 -128 52q-55 38 -84 38q-39 0 -70.5 -23t-45.5 -60l-32 12q21 57 59 94t89 37q53 0 128 -52q55 -38 84 -38q39 0 70.5 23t45.5 60z" id="x223C"></path></g><g transform="matrix(.017,-0,0,-.017,25.272,10.963)"><path d="M137 343l67 33q37 17 63 17q79 0 129.5 -53t50.5 -131q0 -92 -58 -156.5t-147 -64.5t-147 68t-58 182q0 63 17 119t43 95.5t61.5 72t69 52t67.5 31.5q62 22 128 33l6 -32q-56 -11 -108 -35q-149 -71 -184 -231zM227 337q-47 0 -95 -27q-6 -23 -6 -70q0 -93 36 -155.5
t96 -62.5q53 0 78 45.5t25 105.5q0 68 -35 116t-99 48z" id="x36"></path></g>
</svg> Gyr. Due to the different degree of tidal disruption experienced in each case, some satellites have turned more elliptical in shape in either one (Orb2) or both (Orb4) their stellar components. Satellites in orbits 1 and 4 remain still quite spherical as the progenitor model.</table>

Advances in Astronomy

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Figure 3

Figure 3: The Effect of Tidal Stripping on Composite Stellar Populations in Dwarf Spheroidal Galaxies 