![](/images/graphics-bg.png)
Dark Matter Substructure and Dwarf Galactic Satellites
Author
Source
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-21, 21 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-12-03
Country of Publication
Egypt
No. of Pages
21
Main Subjects
Abstract EN
A decade ago cosmological simulations of increasingly higher resolution were used to demonstrate that virialized regions of Cold Dark Matter (CDM) halos are filled with a multitude of dense, gravitationally bound clumps.
These dark matter subhalos are central regions of halos that survived strong gravitational tidal forces and dynamical friction during the hierarchical sequence of merging and accretion via which the CDM halos form.
Comparisons with observations revealed that there is a glaring discrepancy between abundance of subhalos and luminous satellites of the Milky Way and Andromeda as a function of their circular velocity or bound mass within a fixed aperture.
This large discrepancy, which became known as the “substructure” or the “missing satellites” problem, begs for an explanation.
In this paper, the author reviews the progress made during the last several years both in quantifying the problem and in exploring possible scenarios in which it could be accommodated and explained in the context of galaxy formation in the framework of the CDM paradigm of structure formation.
In particular, he shows that the observed luminosity function, radial distribution, and the remarkable similarity of the inner density profiles of luminous satellites can be understood within hierarchical CDM framework using a simple model in which efficiency of star formation monotonically decreases with decreasing virial mass satellites had before their accretion without any actual sharp galaxy formation threshold.
American Psychological Association (APA)
Kravtsov, Andrey V.. 2009. Dark Matter Substructure and Dwarf Galactic Satellites. Advances in Astronomy،Vol. 2010, no. 2010, pp.1-21.
https://search.emarefa.net/detail/BIM-460056
Modern Language Association (MLA)
Kravtsov, Andrey V.. Dark Matter Substructure and Dwarf Galactic Satellites. Advances in Astronomy No. 2010 (2010), pp.1-21.
https://search.emarefa.net/detail/BIM-460056
American Medical Association (AMA)
Kravtsov, Andrey V.. Dark Matter Substructure and Dwarf Galactic Satellites. Advances in Astronomy. 2009. Vol. 2010, no. 2010, pp.1-21.
https://search.emarefa.net/detail/BIM-460056
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-460056