Formation of compact galaxies in the Extreme-Horizon simulation
Formation of compact galaxies in the Extreme-Horizon simulation
We present the Extreme-Horizon (EH) cosmological simulation: EH models galaxy formation with stellar and AGN feedback and uses a very high resolution in the intergalactic and circumgalactic medium. The high resolution in low-density regions results in smaller-size massive galaxies at redshift $z=2$, in better agreement with observations compared to other simulations. This results from the improved modeling of cold gas flows accreting onto galaxies. Besides, the EH simulation forms a population of particularly compact galaxies with stellar masses of $10^{10-11}$\,M$_\sun$ that are reminiscent of observed ultracompact galaxies at $z\simeq2$. These objects form mainly through repeated major mergers of low-mass progenitors, independently of baryonic feedback mechanisms. This formation process can be missed in simulations using a too low resolution in low-density intergalactic regions.
Clotilde Laigle、Julien Devriendt、Nathalie Palanque-Delabrouille、Raphael Gavazzi、Maxime Trebitsch、Fr¨|d¨|ric Bournaud、Damien Chapon、Garreth Martin、Taysun Kimm、Jean-Baptiste Lekien、David Elbaz、Pierre-Franck Piserchia、Yohan Dubois、S¨|bastien Peirani、Olivier Bressand、Sandrine Codis、Christophe Pichon、Christophe Y¨¨che、Katarina Kraljic、Sol¨¨ne Chabanier、Adrianne Slyz
天文学
Clotilde Laigle,Julien Devriendt,Nathalie Palanque-Delabrouille,Raphael Gavazzi,Maxime Trebitsch,Fr¨|d¨|ric Bournaud,Damien Chapon,Garreth Martin,Taysun Kimm,Jean-Baptiste Lekien,David Elbaz,Pierre-Franck Piserchia,Yohan Dubois,S¨|bastien Peirani,Olivier Bressand,Sandrine Codis,Christophe Pichon,Christophe Y¨¨che,Katarina Kraljic,Sol¨¨ne Chabanier,Adrianne Slyz.Formation of compact galaxies in the Extreme-Horizon simulation[EB/OL].(2020-07-09)[2025-06-19].https://arxiv.org/abs/2007.04624.点此复制
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