Two channels for the formation of compact dwarf galaxies in clusters of galaxies

Abstract

We have identified two channels for the formation of compact dwarf galaxies in the Illustris simulation by reconstructing mass and distance histories of candidates located in the vicinity of the simulation's most massive cluster galaxies. One channel is tidal stripping of Milky Way mass galaxies that form outside of clusters and eventually sink into them, spiraling in toward central massive objects. Second channel of formation is an in-situ formation (in reference to the parent cluster) of dwarf mass galaxies, with negligible evolution and limited change in stellar mass. We find 19 compact dwarf galaxies at the centers of 14 clusters, consistent with observations. 30% of them have external origin while 70% are formed in-situ.

arXiv comment11 pages, 8 figures. Accepted by MNRAS

References in corpus (28)

• Populating a cluster of galaxies - I. Results at z=0
• How Do Galaxies Get Their Gas?
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• The mass distribution and gravitational potential of the Milky Way
• The merger rate of galaxies in the Illustris Simulation: a comparison with observations and semi-empirical models
• The Illustris Simulation: Public Data Release
• A class of compact dwarf galaxies from disruptive processes in galaxy clusters
• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or Extremely Compact Dwarf Galaxies?
• The Formation of Massive, Compact Galaxies at z=2 in the Illustris Simulation
• Galaxy threshing and the origin of ultra-compact dwarf galaxies in the Fornax cluster
• The AIMSS Project I: Bridging the Star Cluster - Galaxy Divide
• A new formation model for M32: A threshed early-type spiral?
• The diverse evolutionary paths of simulated high-z massive, compact galaxies to z=0
• Ultra Compact Objects in the Fornax Cluster of Galaxies: Globular clusters or dwarf galaxies?
• The central region of the Fornax cluster -- III. Dwarf galaxies, globular clusters, and cD halo - are there interrelations?
• Discovery of Ultra-Compact Dwarf Galaxies in the Virgo Cluster
• The HST/ACS Coma Cluster Survey: V - Compact Stellar Systems in the Coma Cluster
• SDSSJ124155.33+114003.7 -- a Missing Link Between Compact Elliptical and Ultracompact Dwarf Galaxies
• Cold-Mode Accretion: Driving the Fundamental Mass-Metallicity Relation at z~2
• Ultra Compact Dwarf galaxies in Abell 1689: a photometric study with the ACS
• Discovery of two M32 twins in Abell 1689
• Cold filaments in galaxy clusters: effects of heat conduction
• Discovery of a new M32-like "Compact Elliptical" galaxy in the halo of the Abell 496 cD galaxy
• How Environment Affects Galaxy Metallicity through Stripping and Formation History: Lessons from the Illustris Simulation
• Hubble Space Telescope survey of the Perseus Cluster -IV: Compact stellar systems in the Perseus Cluster core and Ultra Compact Dwarf formation in star forming filaments
• Ultra compact dwarfs in the Perseus Cluster: UCD formation via tidal stripping
• Merging Massive Star Clusters as Building Blocks of Dwarf Galaxies ?
• Effect of cross-redistribution on the resonance scattering polarization of O {\sc i} line at 1302 Å\,

Cited by in corpus (11)

• Dark-matter-deficient dwarf galaxies form via tidal stripping of dark matter in interactions with massive companions
• Dark matter stripping in galaxy clusters: a look at the Stellar to Halo Mass relation in the Illustris simulation
• The PIPER Survey: I. An Initial Look at the Intergalactic Globular Cluster Population in the Perseus Cluster
• A search for active galactic nuclei in low-mass compact galaxies
• Low-mass compact elliptical galaxies: spatially-resolved stellar populations and kinematics with the Keck Cosmic Web Imager
• Compact elliptical galaxies in different local environments: a mixture of galaxies with different origins?
• Galactic Habitability Re-Examined: Indications of Bimodality
• The formation pathways of compact elliptical galaxies
• Compact elliptical galaxies hosting active galactic nuclei in isolated environment
• Infrared variable stars in the compact elliptical galaxy M32
• Dark matter mass loss in galaxy flybys: dependence on impact parameter