2011A&A...531A.100R


Query : 2011A&A...531A.100R

2011A&A...531A.100R - Astronomy and Astrophysics, volume 531A, 100-100 (2011/7-1)

Remarks on the properties of elliptical galaxies in modified newtonian dynamics.

RICHTLER T., FAMAEY B., GENTILE G. and SCHUBERTH Y.

Abstract (from CDS):

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. We compare published scaling relations for the dark halos of elliptical galaxies to the scaling relations expected for MONDian phantom halos. 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. 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.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: kinematics and dynamics - gravitation

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 2974 Sy2 09 42 33.2918467632 -03 41 57.038311068   12.19   10.77   ~ 438 0
2 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6591 0
3 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7134 3
4 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 11.40 12.122 11.386 ~ 779 3
5 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4762 2

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