A New LISA-Detectable Type Ia Supernova Progenitor in the Southern Sky: SMSS J1138-5139

Alekzander Kosakowski, Matti Dorsch, Warren R. Brown +3

We present the discovery and analysis of a nearby eclipsing ultra-compact accreting binary at coordinates 11:38:10.91 $-$51:39:49.15 (SMSS J1138$-$5139), the first well-constrained…