One type of these bodies ceases to emit radiation at the so-called “death line.” A 2017 (-5[1])multi-messenger astronomy breakthrough (-5[1])involved measuring both gravitational waves and (-5[1])a gamma-ray burst (-5[2])from the merger (-5[3])of (10[1])two (-5[1])of (-5[1])these bodies, (10[3]-5[15])known as a (-5[1])kilonova. (10[2]-5[5])An (0[1]-5[1])upper limit (10[1]-5[1])on these bodies’ (-5[1])mass (10[2])is named for Tolman, (-5[3])Oppenheimer, (10[1]-5[1])and Volkov. (10[4])A “glitch” (10[1]0[1]-5[1])is a small increase in the frequency (10[1])emitted by rapidly rotating (10[1])examples (-5[1])of these (10[1])bodies (10[1]0[1])called (10[1])pulsars. (10[1]-5[1])Stars (10[1])whose (10[1])mass is just above the Chandrasekar limit form one of these bodies after a supernova instead of a white dwarf. (10[1])For 10 points, what extremely dense celestial bodies (-5[3])are named for a subatomic (10[1])particle? (10[10])■END■ (10[18]0[5])