Bar-like galaxies in IllustrisTNG

被引:18
|
作者
Lokas, Ewa L. [1 ]
机构
[1] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Bartycka 18, PL-00716 Warsaw, Poland
关键词
galaxies; evolution; interactions; kinematics and dynamics; structure; clusters; general; TIDALLY INDUCED BARS; SPIRAL GALAXY; DARK-MATTER; SIMULATIONS; EVOLUTION; GAS; MORPHOLOGY; STABILITY; STRENGTH; ROTATION;
D O I
10.1051/0004-6361/202040056
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study a sample of bar-like galaxies in the Illustris TNG100 simulation, in which almost the whole stellar component is in the form of a prolate spheroid. The sample is different from the late-type barred galaxies studied before. In addition to the requirement of a high enough stellar mass and resolution, the 277 galaxies were selected based on the single condition of a low enough ratio of the intermediate to long axis of the stellar component. We followed the mass and shape evolution of the galaxies as well as their interactions with other objects and divided them into three classes based on the origin of the bar and the subsequent history. In galaxies of class A (comprising 28% of the sample), the bar was induced by an interaction with a larger object, most often a cluster or group central galaxy, and the galaxies were heavily stripped of dark matter and gas. In classes B and C (27% and 45% of the sample, respectively) the bars were induced by a merger or a passing satellite, or they were formed by disk instability. Class B galaxies were then partially stripped of mass, while those of class C evolved without strong interactions, thus retaining their dark matter and gas in the outskirts. We illustrate the properties of the different classes with three representative examples of individual galaxies. In spite of the different evolutionary histories, the bars are remarkably similar in strength, length, and formation times. The gas fraction in the baryonic component within two stellar half-mass radii at the time of bar formation is always below 0.4 and usually very low, which confirms in the cosmological context the validity of this threshold, which has previously been identified in controlled simulations. Observational counterparts of these objects can be found among early-type fast rotators, S0 galaxies, or red spirals with bars.
引用
收藏
页数:10
相关论文
共 50 条
  • [1] The incidence of bar-like kinematic flows in CALIFA galaxies
    Holmes, L.
    Spekkens, K.
    Sanchez, S. F.
    Walcher, C. J.
    Garcia-Benito, R.
    Mast, D.
    Cortijo-Ferrero, C.
    Kalinova, V.
    Marino, R. A.
    Mendez-Abreu, J.
    Barrera-Ballesteros, J. K.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 451 (04) : 4397 - 4411
  • [2] Outline of the unified theory of spiral and bar-like structures in galaxies
    Polyachenko, EV
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 348 (01) : 345 - 354
  • [3] BAR-LIKE OBJECTS IN CENTERS OF GALAXIES AS A POSSIBLE GENERATOR OF SPIRAL DENSITY WAVES .1.
    KORCHAGIN, VI
    MAROCHNIK, LS
    ASTRONOMICHESKII ZHURNAL, 1975, 52 (01): : 15 - 25
  • [4] Thermal Conductivity Measurement of A Bar-like Object
    Dai, Chuanshan
    Guo, Xin
    Lu, Jinhua
    Lei, Haiyan
    PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY, 2017, 142 : 3975 - 3981
  • [5] Uphill filling system for a bar-like casting
    Zhang, Lintao
    Low, Kenny W. Q.
    Belblidia, Fawzi
    Sienz, Johann
    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2018, 262 : 269 - 276
  • [6] ON SPIRAL STRUCTURE FORMATION IN A GALAXY WITH A BAR-LIKE NUCLEUS
    ELISEEV, YN
    STEPANOV, KN
    ASTROPHYSICS AND SPACE SCIENCE, 1985, 114 (02) : 233 - 248
  • [7] BAR-LIKE OBJECTS IN CENTERS OF GALAXIES AS A POSSIBLE GENERATOR OF SPIRAL DENSITY WAVES - RESPONSE IN NEIGHBORHOOD OF CO-ROTATION CIRCLE
    KORCHAGIN, VI
    ASTRONOMICHESKII ZHURNAL, 1976, 53 (02): : 260 - 267
  • [8] Preparation of encoded bar-like core-shell microparticles on a microfluidic chip
    Yang, Chun-Guang
    Cheng, Lin
    Ye, Wen-Qi
    Zheng, Dong-Hua
    Xu, Zhang-Run
    COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2020, 588
  • [9] Formation of Superthin Galaxies in IllustrisTNG
    Jianhong Hu
    Dandan Xu
    Cheng Li
    ResearchinAstronomyandAstrophysics, 2024, 24 (07) : 238 - 251
  • [10] Barred Galaxies in the IllustrisTNG Simulation
    Zhao, Dongyao
    Du, Min
    Ho, Luis C.
    Debattista, Victor P.
    Shi, Jingjing
    ASTROPHYSICAL JOURNAL, 2020, 904 (02):