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Remarks on the properties of elliptical galaxies in modified Newtonian dynamics

T Richtler, B Famaey, Gianfranco Gentile UGent and Y Schuberth (2011) ASTRONOMY & ASTROPHYSICS. 531.
abstract
Context. Two incorrect arguments against MOND in elliptical galaxies could be that the equivalent circular velocity curves tend to become flat at much larger accelerations than in spiral galaxies, and that the Newtonian dark matter halos are more concentrated than in spirals. Aims. We compare published scaling relations for the dark halos of elliptical galaxies to the scaling relations expected for MONDian phantom halos. Methods. We represent the baryonic content of galaxies by spherical profiles, and their corresponding MONDian phantom halos by logarithmic halos. We then derive the surface densities, central densities, and phase space densities and compare them with published scaling relations. Results. We conclude that it is possible to recreate flat circular velocity curves at high acceleration in MOND, and that this happens for baryonic distributions described by Jaffe profiles in the region where the circular velocity curve is flat. Moreover, the scaling relations of the dark halos of ellipticals are remarkably similar to the scaling relations of phantom halos of MOND.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
galaxies: elliptical and lenticular, GLOBULAR-CLUSTER SYSTEM, cD, galaxies: kinematics and dynamics, gravitation, DARK-MATTER HALO, TULLY-FISHER RELATION, FUNDAMENTAL PLANE, SCALING RELATIONS, SURFACE-DENSITY, COMA CLUSTER, MASS, ACCELERATION, KINEMATICS
journal title
ASTRONOMY & ASTROPHYSICS
Astron. Astrophys.
volume
531
article_number
A100
pages
5 pages
Web of Science type
Article
Web of Science id
000293017700094
JCR category
ASTRONOMY & ASTROPHYSICS
JCR impact factor
4.587 (2011)
JCR rank
10/56 (2011)
JCR quartile
1 (2011)
ISSN
0004-6361
DOI
10.1051/0004-6361/201116531
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2918576
handle
http://hdl.handle.net/1854/LU-2918576
date created
2012-06-25 15:00:57
date last changed
2012-06-29 15:51:02
@article{2918576,
  abstract     = {Context. Two incorrect arguments against MOND in elliptical galaxies could be that the equivalent circular velocity curves tend to become flat at much larger accelerations than in spiral galaxies, and that the Newtonian dark matter halos are more concentrated than in spirals. 
Aims. We compare published scaling relations for the dark halos of elliptical galaxies to the scaling relations expected for MONDian phantom halos. 
Methods. We represent the baryonic content of galaxies by spherical profiles, and their corresponding MONDian phantom halos by logarithmic halos. We then derive the surface densities, central densities, and phase space densities and compare them with published scaling relations. 
Results. We conclude that it is possible to recreate flat circular velocity curves at high acceleration in MOND, and that this happens for baryonic distributions described by Jaffe profiles in the region where the circular velocity curve is flat. Moreover, the scaling relations of the dark halos of ellipticals are remarkably similar to the scaling relations of phantom halos of MOND.},
  articleno    = {A100},
  author       = {Richtler, T and Famaey, B and Gentile, Gianfranco and Schuberth, Y},
  issn         = {0004-6361},
  journal      = {ASTRONOMY \& ASTROPHYSICS},
  keyword      = {galaxies: elliptical and lenticular,GLOBULAR-CLUSTER SYSTEM,cD,galaxies: kinematics and dynamics,gravitation,DARK-MATTER HALO,TULLY-FISHER RELATION,FUNDAMENTAL PLANE,SCALING RELATIONS,SURFACE-DENSITY,COMA CLUSTER,MASS,ACCELERATION,KINEMATICS},
  language     = {eng},
  pages        = {5},
  title        = {Remarks on the properties of elliptical galaxies in modified Newtonian dynamics},
  url          = {http://dx.doi.org/10.1051/0004-6361/201116531},
  volume       = {531},
  year         = {2011},
}

Chicago
Richtler, T, B Famaey, Gianfranco Gentile, and Y Schuberth. 2011. “Remarks on the Properties of Elliptical Galaxies in Modified Newtonian Dynamics.” Astronomy & Astrophysics 531.
APA
Richtler, T., Famaey, B., Gentile, G., & Schuberth, Y. (2011). Remarks on the properties of elliptical galaxies in modified Newtonian dynamics. ASTRONOMY & ASTROPHYSICS, 531.
Vancouver
1.
Richtler T, Famaey B, Gentile G, Schuberth Y. Remarks on the properties of elliptical galaxies in modified Newtonian dynamics. ASTRONOMY & ASTROPHYSICS. 2011;531.
MLA
Richtler, T, B Famaey, Gianfranco Gentile, et al. “Remarks on the Properties of Elliptical Galaxies in Modified Newtonian Dynamics.” ASTRONOMY & ASTROPHYSICS 531 (2011): n. pag. Print.