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Integral field spectroscopy surveys provide spatially resolved gas and stellar kinematics of galaxies. They have unveiled a range of atypical kinematic phenomena, which require detailed modelling to understand. We present results from a…

Astrophysics of Galaxies · Physics 2018-06-13 Philip Taylor , Christoph Federrath , Chiaki Kobayashi

We present the formation of a Kinematically Decoupled Core (KDC) in an elliptical galaxy, resulting from a major merger simulation of two disk galaxies. We show that although the two progenitor galaxies are initially following a prograde…

Astrophysics of Galaxies · Physics 2015-06-23 Athanasia Tsatsi , Andrea V. Macciò , Glenn van de Ven , Benjamin P. Moster

We present a case study of a early-type galaxy (ETG) hosting a kinematically distinct core (KDC) formed in a binary high resolution 1:1 spiral galaxy merger simulation. The runtime of the simulation is pushed up to 10Gyr to follow the…

Astrophysics of Galaxies · Physics 2017-08-21 Felix Schulze , Rhea-Silvia Remus , Klaus Dolag

Ellipticals in very low density environments are extremely rare but hold important clues about galaxy formation and evolution. In this paper we continue our study of isolated elliptical galaxies, presenting results on the radial stellar…

Astrophysics · Physics 2009-11-11 George Hau , Duncan Forbes

Aims. Interacting galaxies show unique irregularities in their kinematic structure. By investigating the spatially resolved kinematics and stellar population properties of galaxies that show irregularities, we can paint a detailed picture…

Astrophysics of Galaxies · Physics 2021-03-31 Kiyoaki Christopher Omori , Tsutomu T. Takeuchi

We present evidence for kinematically decoupled cores (KDCs) in two dwarf early-type (dE) galaxies in the Virgo cluster, VCC 1183 and VCC 1453, studied as part of the SMAKCED stellar absorption-line spectroscopy and imaging survey. These…

We summarise the results and achievements of integral-field spectroscopy of early-type galaxies, observed as part of a survey using both the SAURON and OASIS spectrographs. From the perspective of integral-field spectroscopy, these…

From the IllustrisTNG-50 simulation, a sample of 836 central disk galaxies with tiny stellar halos is chosen to study the inherent evolution of galaxies driven by nature. These galaxies are classified as compact, normal, or extended by…

Astrophysics of Galaxies · Physics 2024-09-25 Hong-Chuan Ma , Min Du , Luis C. Ho , Ming-jie Sheng , Shihong Liao

Explaining the internal distribution and motions of stars and gas in galaxies is a key aspect in understanding their evolution. In previous work we identified five well resolved galaxies with atypical kinematics from a cosmological…

Astrophysics of Galaxies · Physics 2019-03-13 Philip Taylor , Chiaki Kobayashi , Christoph Federrath

We use the Illustris simulation to study the distributions of ellipticities and kinematic misalignments of galactic projections, as well as the intrinsic shapes and rotation of the simulated galaxies. Our results for the projections of…

Astrophysics of Galaxies · Physics 2019-08-14 Lisiyuan Yang , Dandan Xu , Shude Mao , Volker Springel , Hongyu Li

Studies of the kinematics of NGC 1407 have revealed complex kinematical structure, consisting of the outer galaxy, an embedded disc within a radius of $\sim60$ arcsec, and a kinematically decoupled core (KDC) with a radius of less than…

Astrophysics of Galaxies · Physics 2018-09-05 Evelyn J. Johnston , George K. T. Hau , Lodovico Coccato , Cristian Herrera

Massive, quiescent galaxies at high redshift have been found to be considerably more compact than galaxies of similar mass in the local universe. How these compact galaxies formed has yet to be determined, though several progenitor…

We study the structural evolution of isolated star-forming galaxies in the Illustris TNG100-1 hydrodynamical simulation, with a focus on investigating the growth of the central core density within 2 kpc ($\Sigma_{*,2kpc}$) in relation to…

Astrophysics of Galaxies · Physics 2021-03-24 Dan Walters , Joanna Woo , Sara L. Ellison , Maan H. Hani

A key feature of a large population of low-mass, late-type disk galaxies are star-forming disks with exponential light distributions. They are typically also associated with thin and flat morphologies, blue colors, and dynamically cold…

(Abridged) Any viable cosmological model in which galaxies interact predicts the existence of primordial and tidal dwarf galaxies (TDGs). In particular, in the standard model of cosmology ($\Lambda$CDM), according to the dual dwarf galaxy…

Astrophysics of Galaxies · Physics 2019-10-16 Moritz Haslbauer , Joerg Dabringhausen , Pavel Kroupa , Behnam Javanmardi , Indranil Banik

MUSE observations of NGC5813 reveal a complex structure in the velocity dispersion map, previously hinted by SAURON observations. The structure is reminiscent of velocity dispersion maps of galaxies comprising two counter-rotating discs,…

We analyze the formation histories of 19 galaxies from cosmological smoothed particle hydrodynamics zoom-in resimulations. We construct mock three-colour images and show that the models reproduce observed trends in the evolution of galaxy…

Astrophysics of Galaxies · Physics 2014-04-29 Michael Aumer , Simon D. M. White , Thorsten Naab

{We present, for the first time, photometric and kinematical evidence, obtained with FORS2 on the VLT, for the existence of kinematically decoupled cores (KDCs) in two dwarf elliptical galaxies; FS76 in the NGC5044 group and FS373 in the…

Astrophysics · Physics 2009-11-10 S. De Rijcke , H. Dejonghe , W. W. Zeilinger , G. K. T. Hau

We present dynamical measurements from the KMOS (K-band Multi-Object Spectrograph) Deep Survey (KDS), which is comprised of 77 typical star-forming galaxies at z $\simeq$ 3.5 in the mass range 9.0 < log(M$_{\star}$/M$_{\odot}$) < 10.5.…

We present a detailed two-dimensional stellar dynamical analysis of a sample of 44 cosmological hydrodynamical simulations of individual central galaxies and their satellites. Kinematic maps of the stellar line-of-sight velocity, velocity…

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