On the universality of the global density slope-anisotropy inequality
(2011) ASTROPHYSICAL JOURNAL. 726(2).- abstract
- Recently, some intriguing results have led to speculations whether the central density slope-velocity dispersion anisotropy inequality (An & Evans) actually holds at all radii for spherical dynamical systems. We extend these studies by providing a complete analysis of the global slope-anisotropy inequality for all spherical systems in which the augmented density is a separable function of radius and potential. We prove that these systems indeed satisfy the global inequality if their central anisotropy is beta(0) <= 1/2. Furthermore, we present several systems with beta(0) > 1/2 for which the inequality does not hold, thus demonstrating that the global density slope-anisotropy inequality is not a universal property. This analysis is a significant step toward an understanding of the relation for general spherical systems.
Please use this url to cite or link to this publication:
http://hdl.handle.net/1854/LU-1241059
- author
- Emmanuel Van Hese UGent, Maarten Baes UGent and Herwig Dejonghe UGent
- organization
- year
- 2011
- type
- journalArticle (original)
- publication status
- published
- subject
- keyword
- DARK-MATTER HALOS, dark matter, DYNAMICAL MODELS, SPHERICAL STELLAR-SYSTEMS, Galaxy: kinematics and dynamics, methods: analytical
- journal title
- ASTROPHYSICAL JOURNAL
- Astrophys. J.
- volume
- 726
- issue
- 2
- article_number
- 80
- pages
- 6 pages
- Web of Science type
- Article
- Web of Science id
- 000285623600024
- JCR category
- ASTRONOMY & ASTROPHYSICS
- JCR impact factor
- 6.024 (2011)
- JCR rank
- 6/56 (2011)
- JCR quartile
- 1 (2011)
- ISSN
- 0004-637X
- DOI
- 10.1088/0004-637X/726/2/80
- language
- English
- UGent publication?
- yes
- classification
- A1
- copyright statement
- I have transferred the copyright for this publication to the publisher
- id
- 1241059
- handle
- http://hdl.handle.net/1854/LU-1241059
- date created
- 2011-05-25 13:05:49
- date last changed
- 2011-06-08 11:27:42
@article{1241059,
abstract = {Recently, some intriguing results have led to speculations whether the central density slope-velocity dispersion anisotropy inequality (An \& Evans) actually holds at all radii for spherical dynamical systems. We extend these studies by providing a complete analysis of the global slope-anisotropy inequality for all spherical systems in which the augmented density is a separable function of radius and potential. We prove that these systems indeed satisfy the global inequality if their central anisotropy is beta(0) {\textlangle}= 1/2. Furthermore, we present several systems with beta(0) {\textrangle} 1/2 for which the inequality does not hold, thus demonstrating that the global density slope-anisotropy inequality is not a universal property. This analysis is a significant step toward an understanding of the relation for general spherical systems.},
articleno = {80},
author = {Van Hese, Emmanuel and Baes, Maarten and Dejonghe, Herwig},
issn = {0004-637X},
journal = {ASTROPHYSICAL JOURNAL},
keyword = {DARK-MATTER HALOS,dark matter,DYNAMICAL MODELS,SPHERICAL STELLAR-SYSTEMS,Galaxy: kinematics and dynamics,methods: analytical},
language = {eng},
number = {2},
pages = {6},
title = {On the universality of the global density slope-anisotropy inequality},
url = {http://dx.doi.org/10.1088/0004-637X/726/2/80},
volume = {726},
year = {2011},
}
- Chicago
- Van Hese, Emmanuel, Maarten Baes, and Herwig Dejonghe. 2011. “On the Universality of the Global Density Slope-anisotropy Inequality.” Astrophysical Journal 726 (2).
- APA
- Van Hese, E., Baes, M., & Dejonghe, H. (2011). On the universality of the global density slope-anisotropy inequality. ASTROPHYSICAL JOURNAL, 726(2).
- Vancouver
- 1.Van Hese E, Baes M, Dejonghe H. On the universality of the global density slope-anisotropy inequality. ASTROPHYSICAL JOURNAL. 2011;726(2).
- MLA
- Van Hese, Emmanuel, Maarten Baes, and Herwig Dejonghe. “On the Universality of the Global Density Slope-anisotropy Inequality.” ASTROPHYSICAL JOURNAL 726.2 (2011): n. pag. Print.