quietly accreting

Sunday, April 2, 2017 11:27 AM


a few more "final" configuration tweaks before the public launch.

the live updating of the latest journal papers that cite MESA will be a reminder to me to send a brief message to authors requesting their inlists/run_star_extras.  so yea, i'm going to step up my efforts to encourage authors to  give back to the community and abide by the open knowledge part of the manifesto. 

accreting neutron stars compress the ashes of previous burning stages - hydrogen burning ashes for type I x-ray busts and carbon burning ashes for superbursts. the accretion pushes the ashes deeper into the neutron star crust where the density is larger. in turn, the larger density causes additional nuclear reactions - electron capture and beta decay. these weak reaction produce neutrinos which freely leave the neutron star, and thus cool the crust. this nifty paper by zach meisel and alex deibel uses MESA to explore how the quiesent light curve (i.e., the light curve between outbursts) can constrain the composition of the ashes from previous outbursts that occursed within the last 100 years or so. 

fxt