Analysis of the Conformally Flat Approximation for Binary Neutron Star Initial Conditions

<div>EoS index <svg height="8.68572pt" id="M125" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 6.71534 8.68572" width="6.71534pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M485 501C480 550 475 615 475 650H42V622C119 616 127 606 127 525V126C127 44 119 34 41 28V0H311V28C220 34 212 43 212 126V584C212 612 216 615 244 615H318C382 615 404 608 420 587C435 568 445 541 455 497L485 501Z" id="g113-132"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="507" vert-adv-y="507"></glyph.data></g></svg> versus central density for various equations of state. Large <svg height="8.68572pt" id="M126" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 6.71534 8.68572" width="6.71534pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M485 501C480 550 475 615 475 650H42V622C119 616 127 606 127 525V126C127 44 119 34 41 28V0H311V28C220 34 212 43 212 126V584C212 612 216 615 244 615H318C382 615 404 608 420 587C435 568 445 541 455 497L485 501Z" id="g113-132"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="507" vert-adv-y="507"></glyph.data></g></svg> implies a stiff EoS.</div>

Advances in Astronomy

fig9

Figure 9

Figure 9: Analysis of the Conformally Flat Approximation for Binary Neutron Star Initial Conditions 