Structures of Dwarf Satellites of Milky Way-like Galaxies: Morphology, Scaling Relations, and Intrinsic Shapes

The structure of a dwarf galaxy is an important probe into the effects stellar feedback and environment. Using unprecedented sample 223 low-mass satellites from ongoing Exploration Local VolumE Satellites (ELVES) Survey, we explore structures in mass range $10^{5.5}<M_\star<10^{8.5}$M$_\odot$. We survey around $80\%$ massive, $M_K<-22.4$ mag, hosts Volume. Our complete to luminosities $M_V<-9$ mag surface brightness $\mu_{0,V}<26.5$ arcsec$^{-2}$ within at least $\sim200$ projected kpc. separate late- early-type, finding mass-size relations are very similar between them, $\sim5\%$. This similarity indicates that quenching transformation late-type early-type involves only mild size evolution. Considering distribution apparent ellipticities, infer intrinsic shapes early- samples. Combining with literature samples, find both types dwarfs get thicker fainter but early-types always rounder fixed luminosity. Finally, compare LV samples cores Virgo Fornax clusters. cluster show scaling roughly $10\%$ larger mass, which interpret as being due tidal heating environments. results presented here useful reference for simulations formation irregulars spheroidals.