The evolution of galaxy dust scaling relations in the COLIBRE simulations

The evolution of galaxy dust scaling relations in the COLIBRE simulations
Aswin P. Vijayan, James W. Trayford, Joop Schaye, Sylvia Ploeckinger, Andrea Gebek, Nick Andreadis, Maarten Baes, Alejandro Ben’itez-Llambay, Evgenii Chaikin, Carlos S. Frenk, Filip Huv{s}ko, Robert J. McGibbon, Alexander J. Richings, Matthieu Schaller
arXiv:2607.26058v1 Announce Type: new
Abstract: We present dust scaling relations across cosmic time ($0 le z le 15$) for galaxies in the COLIBRE cosmological simulations. COLIBRE self-consistently tracks dust production, growth, destruction, and grain size evolution within a multiphase interstellar medium. Using volumes up to $(400, {rm cMpc})^3$ at three mass resolutions ($10^{5}-10^7$ M$_{odot}$), we predict the dust mass function, cosmic dust mass density, and key dust scaling relations (dust-to-gas ratio, dust-to-metal ratio, grain species fractions, and grain sizes) as functions of galaxy metallicity, stellar mass, and dust mass. The model broadly reproduces most observed relations across cosmic time, matching closest at the highest resolution. We find that silicates dominate the dust mass ($gtrsim 70%$) at all epochs, and while large grains dominate in the early Universe ($z ge 5$), their mass fraction declines to become comparable to small grains by $z=0$. At $z arXiv:2607.26058v1 Announce Type: new
Abstract: We present dust scaling relations across cosmic time ($0 le z le 15$) for galaxies in the COLIBRE cosmological simulations. COLIBRE self-consistently tracks dust production, growth, destruction, and grain size evolution within a multiphase interstellar medium. Using volumes up to $(400, {rm cMpc})^3$ at three mass resolutions ($10^{5}-10^7$ M$_{odot}$), we predict the dust mass function, cosmic dust mass density, and key dust scaling relations (dust-to-gas ratio, dust-to-metal ratio, grain species fractions, and grain sizes) as functions of galaxy metallicity, stellar mass, and dust mass. The model broadly reproduces most observed relations across cosmic time, matching closest at the highest resolution. We find that silicates dominate the dust mass ($gtrsim 70%$) at all epochs, and while large grains dominate in the early Universe ($z ge 5$), their mass fraction declines to become comparable to small grains by $z=0$. At $z