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How diffuse dwarf galaxies that are deficient in dark matter -- such asNGC1052-DF2 and NGC1052-DF4 -- formed remains a mystery. Along with theirluminous member globular clusters (GCs), the so-called dark matter deficientgalaxies (DMDGs) have challenged observers and theorists alike. Here we reporta suite of galaxy collision simulations using the adaptive mesh refinement codeENZO with 1.25 pc resolution, which demonstrates that high-velocity galaxycollisions induce the formation of DMDGs and their star clusters (SCs)simultaneously. With a numerical resolution significantly better than ourprevious study (Shin et al. 2020), we resolve the dynamical structure of theproduced DMDGs and the detailed formation history of their SCs which arepossible progenitors of the DMDG's member GCs. In particular, we show that agalaxy collision with a high relative velocity of $\sim 300\;{\rm km\;s}^{-1}$,invoking severe shock compression, spawns multiple massive SCs ($\gtrsim10^{6}\;{\rm M}_{\odot}$) within 150 Myr after the collision. At the end of our~ 800 Myr fiducial run, the resulting DMDG of $M_{\star} \simeq 3.5\times10^{8}\;{M}_{\odot}$ hosts 10 luminous ($M_{\rm V} \lesssim -8.5\;{\rm mag}$),gravitational bound SCs with a line-of-sight velocity dispersion $11.2\;{\rmkm\;s}^{-1}$. Our study suggests that DMDGs and their luminous member SCs couldform simultaneously in high-velocity galaxy collisions while being in line withthe key observed properties of NGC1052-DF2 and NGC1052-DF4.

the astrophysical journal. letters (print)

Dark Matter Deficient Galaxies And Their Member Star Clusters Form  Simultaneously During High-velocity Galaxy Collisions In 1.25 pc Resolution  Simulations