Milky Way-est: Cosmological Zoom-in Simulations with Large Magellanic Cloud and Gaia-Sausage-Enceladus Analogs
Deveshi Buch, Ethan O. Nadler, Risa H. Wechsler, Yao-Yuan Mao
arXiv:2404.08043v1 Announce Type: new
Abstract: We present Milky Way-est, a suite of 20 cosmological cold-dark-matter-only zoom-in simulations of Milky Way (MW)-like host halos. Milky Way-est hosts are selected such that they: ($i$) are consistent with the MW’s measured halo mass and concentration, ($ii$) accrete a Large Magellanic Cloud (LMC)-like ($approx 10^{11}~M_{odot}$) subhalo within the last $1.3~mathrm{Gyr}$ on a realistic orbit, placing them near $50~mathrm{kpc}$ from the host center at $zapprox 0$, and ($iii$) undergo a $>$1:5 sub-to-host halo mass ratio merger with a Gaia-Sausage-Enceladus (GSE)-like system at early times ($0.67
Abstract: We present Milky Way-est, a suite of 20 cosmological cold-dark-matter-only zoom-in simulations of Milky Way (MW)-like host halos. Milky Way-est hosts are selected such that they: ($i$) are consistent with the MW’s measured halo mass and concentration, ($ii$) accrete a Large Magellanic Cloud (LMC)-like ($approx 10^{11}~M_{odot}$) subhalo within the last $1.3~mathrm{Gyr}$ on a realistic orbit, placing them near $50~mathrm{kpc}$ from the host center at $zapprox 0$, and ($iii$) undergo a $>$1:5 sub-to-host halo mass ratio merger with a Gaia-Sausage-Enceladus (GSE)-like system at early times ($0.67
2024-04-15
