scholarly journals Smooth, undisturbed dwarf spheroidal galaxies in the Perseus cluster core: Implications for dark matter content

2009 ◽  
Vol 330 (9���10) ◽  
pp. 991-994 ◽  
Author(s):  
Sj. Penny ◽  
Cj. Conselice ◽  
S. De Rijcke ◽  
E.V. Held
Keyword(s):  
Dark Matter ◽  
Matter Content ◽  
Cluster Core ◽  
Dwarf Spheroidal Galaxies ◽  
Perseus Cluster ◽  
Spheroidal Galaxies

scholarly journals Implication of Dark Matter Content in Dwarf Spheroidal Galaxies

1999 ◽  
Vol 192 ◽  
pp. 402-408
Author(s):  
H. Hirashita ◽  
T. T. Takeuchi ◽  
H. Kamaya
Keyword(s):  
Dark Matter ◽  
Local Group ◽  
Matter Content ◽  
Dwarf Spheroidal Galaxies ◽  
Large Velocity ◽  
The Galaxy ◽  
Correlation Tests ◽  
Tidal Heating ◽  
Physical Quantities ◽  
Spheroidal Galaxies

We investigate the dark matter (DM) content in the Local Group dwarf spheroidal galaxies (dSphs) by examining the correlations among their physical quantities. Two origins of the large velocity dispersions of the dSphs are possible: [1] the existence of DM and [2] tidal heating by the Galaxy. The correlation tests support both [1] and [2]. We finally mention circumstantial evidence for the existence of DM in the dSphs.

scholarly journals Dark matter distribution and dynamics of dwarf spheroidal galaxies

2019 ◽  
Vol 14 (S353) ◽  
pp. 239-245
Author(s):  
Ewa L. Łokas
Keyword(s):  
Dark Matter ◽  
Velocity Dispersion ◽  
Matter Content ◽  
Current Status ◽  
Superposition Method ◽  
Matter Distribution ◽  
Dwarf Spheroidal Galaxies ◽  
Dark Matter Distribution ◽  
Dynamical Modelling ◽  
Spheroidal Galaxies

AbstractI review the current status of dynamical modelling of dwarf spheroidal galaxies focusing on estimates of their dark matter content. Starting with the simplest methods using the velocity dispersion profiles I discuss the inherent issues of mass-anisotropy degeneracy and contamination by unbound stars. I then move on to methods of increasing complexity, aiming to break the degeneracy, up to recent applications of the Schwarzschild orbit superposition method. The dynamical modelling is placed in the context of possible scenarios for the formation of dwarf spheroidal galaxies, including the tidal stirring model and mergers of dwarf galaxies. The two scenarios are illustrated with examples from simulations: a comparison between the tidal evolution of dwarfs with cuspy and cored dark matter profiles and the formation of a dwarf spheroidal with prolate rotation.

scholarly journals About the morphology of dwarf spheroidal galaxies and their dark matter content

2003 ◽  
Vol 406 (3) ◽  
pp. 847-854 ◽  
Author(s):  
C. J. Walcher ◽  
J. W. Fried ◽  
A. Burkert ◽  
R. S. Klessen
Keyword(s):  
Dark Matter ◽  
Matter Content ◽  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies

scholarly journals J-factors for self-interacting dark matter in 20 dwarf spheroidal galaxies

2018 ◽  
Vol 98 (4) ◽  
Author(s):  
Sebastian Bergström ◽  
Riccardo Catena ◽  
Andrea Chiappo ◽  
Jan Conrad ◽  
Björn Eurenius ◽  
...  
Keyword(s):  
Dark Matter ◽  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies

scholarly journals Jeans analysis for dwarf spheroidal galaxies in wave dark matter

2017 ◽  
Vol 468 (2) ◽  
pp. 1338-1348 ◽  
Author(s):  
Shu-Rong Chen ◽  
Hsi-Yu Schive ◽  
Tzihong Chiueh
Keyword(s):  
Dark Matter ◽  
Dwarf Spheroidal Galaxies ◽  
Wave Dark Matter ◽  
Spheroidal Galaxies

scholarly journals Evidence for Light-weight Local Group Dwarf Spheroidal Galaxies

2004 ◽  
Vol 220 ◽  
pp. 365-366
Author(s):  
J. R. Kuhn ◽  
D. Kocevski
Keyword(s):  
Dark Matter ◽  
Milky Way ◽  
Local Group ◽  
Light Weight ◽  
Natural Explanation ◽  
Dwarf Spheroidal Galaxies ◽  
Ursa Minor ◽  
Matter Component ◽  
Morphological State ◽  
Spheroidal Galaxies

A simple and natural explanation for the dynamics and morphology of the Local Group Dwarf Spheroidal galaxies, Draco (Dra) and Ursa Minor (UMi), is that they are weakly unbound stellar systems with no significant dark matter component. A gentle, but persistent, Milky Way (MW) tide has left them in their current kinematic and morphological state (the “parametric tidal excitation”). A new test of a dark matter dominated dS potential follows from a careful observation of the “clumpiness” of the dS stellar surface density.

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