Daniele Sorini, Sownak Bose, Romeel Davé, Daniel Anglés Alcázar
{"title":"反馈对从星系到星团的气体密度剖面演变的影响：来自辛巴模拟套件的通用拟合公式","authors":"Daniele Sorini, Sownak Bose, Romeel Davé, Daniel Anglés Alcázar","doi":"arxiv-2409.05815","DOIUrl":null,"url":null,"abstract":"The radial distribution of gas within galactic haloes is connected to the\nstar formation rate and the nature of baryon-driven feedback processes. Using\nsix variants of the hydrodynamic simulation Simba, we study the impact of\ndifferent stellar/AGN feedback prescriptions on the gas density profiles of\nhaloes in the total mass range $10^{11} \\, \\mathrm{M}_{\\odot} <\nM_{\\mathrm{200c}} < 10^{14} \\, \\mathrm{M}_{\\odot}$ and redshift interval\n$0<z<4$. We find that the radial profiles are well represented by a power law\nand that, for a fixed total halo mass, the slope and amplitude of such power\nlaw are generally weakly dependent on redshift. Once AGN-driven jets are\nactivated in the simulation, the gas density profile of haloes with $M_{\\rm\n200c} \\gtrsim 10^{13} \\, \\rm M_{\\odot}$ declines more gently with radial\ndistance. We argue that this distinctive feature could be exploited with\ncurrent observations to discriminate amongst the predictions of the different\nfeedback models. We introduce a universal fitting formula for the slope and\namplitude of the gas density profile as a function of total halo mass and\nredshift. The best-fit functions are suitable for all feedback variants\nconsidered, and their predictions are in excellent agreement with the numerical\nresults. We provide the values of all fit parameters, making our fitting\nformula a versatile tool to mimic the effect of Simba feedback models onto\nN-body simulations and semi-analytical models of galaxy formation. Our results\ncan also aid observational estimates of the gas mass within haloes that assume\na specific slope for the underlying gas density profile.","PeriodicalId":501207,"journal":{"name":"arXiv - PHYS - Cosmology and Nongalactic Astrophysics","volume":"12 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The impact of feedback on the evolution of gas density profiles from galaxies to clusters: a universal fitting formula from the Simba suite of simulations\",\"authors\":\"Daniele Sorini, Sownak Bose, Romeel Davé, Daniel Anglés Alcázar\",\"doi\":\"arxiv-2409.05815\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The radial distribution of gas within galactic haloes is connected to the\\nstar formation rate and the nature of baryon-driven feedback processes. Using\\nsix variants of the hydrodynamic simulation Simba, we study the impact of\\ndifferent stellar/AGN feedback prescriptions on the gas density profiles of\\nhaloes in the total mass range $10^{11} \\\\, \\\\mathrm{M}_{\\\\odot} <\\nM_{\\\\mathrm{200c}} < 10^{14} \\\\, \\\\mathrm{M}_{\\\\odot}$ and redshift interval\\n$0<z<4$. We find that the radial profiles are well represented by a power law\\nand that, for a fixed total halo mass, the slope and amplitude of such power\\nlaw are generally weakly dependent on redshift. Once AGN-driven jets are\\nactivated in the simulation, the gas density profile of haloes with $M_{\\\\rm\\n200c} \\\\gtrsim 10^{13} \\\\, \\\\rm M_{\\\\odot}$ declines more gently with radial\\ndistance. We argue that this distinctive feature could be exploited with\\ncurrent observations to discriminate amongst the predictions of the different\\nfeedback models. We introduce a universal fitting formula for the slope and\\namplitude of the gas density profile as a function of total halo mass and\\nredshift. The best-fit functions are suitable for all feedback variants\\nconsidered, and their predictions are in excellent agreement with the numerical\\nresults. We provide the values of all fit parameters, making our fitting\\nformula a versatile tool to mimic the effect of Simba feedback models onto\\nN-body simulations and semi-analytical models of galaxy formation. Our results\\ncan also aid observational estimates of the gas mass within haloes that assume\\na specific slope for the underlying gas density profile.\",\"PeriodicalId\":501207,\"journal\":{\"name\":\"arXiv - PHYS - Cosmology and Nongalactic Astrophysics\",\"volume\":\"12 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - Cosmology and Nongalactic Astrophysics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.05815\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Cosmology and Nongalactic Astrophysics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.05815","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The impact of feedback on the evolution of gas density profiles from galaxies to clusters: a universal fitting formula from the Simba suite of simulations
The radial distribution of gas within galactic haloes is connected to the
star formation rate and the nature of baryon-driven feedback processes. Using
six variants of the hydrodynamic simulation Simba, we study the impact of
different stellar/AGN feedback prescriptions on the gas density profiles of
haloes in the total mass range $10^{11} \, \mathrm{M}_{\odot} <
M_{\mathrm{200c}} < 10^{14} \, \mathrm{M}_{\odot}$ and redshift interval
$0
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