Characterizing tidal features around galaxies in cosmological simulations

被引：2

作者：

Khalid, A. ^{[1
,2
]}

Brough, S. ^{[1
,2
]}

Martin, G. ^{[3
,4
,5
]}

Kimmig, L. C. ^{[6
]}

Lagos, C. D. P. ^{[2
,7
,8
]}

Remus, R. -s

Martinez-Lombilla, C. ^{[1
,2
,9
]}

机构：

[1] Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia

[2] ARC Ctr Excellence All Sky Astrophys 3 Dimens ASTR, Sydney, Australia

[3] Univ Nottingham, Sch Phys & Astron, Univ Pk, Nottingham NG7 2RD, Nottinghamshire, England

[4] Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, Guam, South Korea

[5] Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85719 USA

[6] Univ Sternwarte Munchen, Fak Phys, LMU Munchen, Scheinerstr 1, D-81679 Munich, Germany

[7] Univ Western Australia, Int Ctr Radio Astron Res, 35 Stirling Highway, Crawley, WA 6009, Australia

[8] Cosm Dawn Ctr DAWN, Copenhagen, Denmark

[9] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 530卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

galaxies: clusters: general; galaxies: evolution; galaxies: groups: general; galaxies: interactions; galaxies: structure; STAR-FORMATION HISTORIES; MASS ASSEMBLY GAMA; ILLUSTRISTNG SIMULATIONS; SAURON PROJECT; BLACK-HOLES; HALO MASS; INTRACLUSTER LIGHT; GALACTIC OUTFLOWS; STELLAR HALOES; DISK GALAXIES;

D O I：

10.1093/mnras/stae1064

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Tidal features provide signatures of recent mergers and offer a unique insight into the assembly history of galaxies. The Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) will enable an unprecedentedly large survey of tidal features around millions of galaxies. To decipher the contributions of mergers to galaxy evolution it will be necessary to compare the observed tidal features with theoretical predictions. Therefore, we use cosmological hydrodynamical simulations NEWHORIZON, EAGLE, ILLUSTRISTNG, and MAGNETICUM to produce LSST-like mock images of z similar to 0 galaxies (z similar to 0.2 for NEWHORIZON) with M-star,(30 pkpc) >= 10(9.5) M-circle dot. We perform a visual classification to identify tidal features and classify their morphology. We find broadly good agreement between the simulations regarding their overall tidal feature fractions: f(NEWHORIZON)= 0.40 +/- 0.06, f(EAGLE) = 0.37 +/- 0.01, f(TNG) = 0.32 +/- 0.01, and f(MAGNETICUM) = 0.32 +/- 0.01, and their specific tidal feature fractions. Furthermore, we find excellent agreement regarding the trends of tidal feature fraction with stellar and halo mass. All simulations agree in predicting that the majority of central galaxies of groups and clusters exhibit at least one tidal feature, while the satellite members rarely show such features. This agreement suggests that gravity is the primary driver of the occurrence of visually identifiable tidal features in cosmological simulations, rather than subgrid physics or hydrodynamics. All predictions can be verified directly with LSST observations.

引用

页码：4422 / 4445

页数：24

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