<html>Hi Jimmy<br /><br />The lower mass that you are asking Lorene for is not realized for neutron stars (lower mass limit >~1.0M_sun)<br />and would rather approach the mass for a brown dwarf. This lower mass and the upper theoretical limit places an upper constraint<br />on the mass ratio to be around q~2. For initial data generation, this limit is of course equation of state - dependent.<br /><br />Consistent with this fact and the theoretical constructions of the equations of state,<br />such a mass ratio is not achievable in the context of neutron stars. <br /><br />Out of the most extreme configurations I've seen,<br />FUKA initial data solver (publicly available) is known to achieve q~2.2 and<br />at least q~2.1 is achieved for SGRID code, LORENE q~1.82, judging<br />from the CoRe database.<br /><br />I do not have much experience with Lorene, but it might not be straightforward to achieve even the<br />theoretically admissible vicinity of q~2.0 due to domain decomposition issues.<br />Perhaps someone with more experience with it could clarify what's realizable with publicly available version of Lorene.<br /><br />Best regards<br />Konrad Topolski<br /><br />W dniu: Środa, Marzec 01, 2023 08:52 CET, 白济民 <beki-cat@sjtu.edu.cn> napisał(a):<br /> <blockquote type="cite" cite="1879165524.7522765.1677657153716.JavaMail.zimbra@sjtu.edu.cn">Hi everyone:<br />I intend to use Lorene to generate an unequal mass binary NS system with large q (with mass 1.4 Mo vs 0.2 Mo), that is, a very light NS orbiting around a standard mass NS. However, Lorene code seems to fail to generate .resu file at such large q and I wonder how can that be possible within Lorene. Is it still under development or can it be done by varying parameter settings in the corresponding parcoal file in Lorene/Codes/Bin_star directory?<br /><br />I also wonder if there is a systematic procedure to adjust the parameter settings of parcoal to generate the initial data of a BNS system with small q?<br />Thanks in advance!<br />Best,<br />Jimmy<br />_______________________________________________<br />Users mailing list<br />Users@einsteintoolkit.org<br />http://lists.einsteintoolkit.org/mailman/listinfo/users</blockquote><br /><br /><br /> </html>