SIMBAD references

2009MNRAS.397.1169D - Mon. Not. R. Astron. Soc., 397, 1169-1176 (2009/August-2)

A constant dark matter halo surface density in galaxies.

DONATO F., GENTILE G., SALUCCI P., FRIGERIO MARTINS C., WILKINSON M.I., GILMORE G., GREBEL E.K., KOCH A. and WYSE R.

Abstract (from CDS):

We confirm and extend the recent finding that the central surface density µ0Dr0ρ0 of galaxy dark matter haloes, where r0 and ρ0are the halo core radius and central density, is nearly constant and independent of galaxy luminosity. Based on the co-added rotation curves (RCs) of ∼1000 spiral galaxies, the mass models of individual dwarf irregular and spiral galaxies of late and early types with high-quality RCs, and the galaxy-galaxy weak-lensing signals from a sample of spiral and elliptical galaxies, we find that logµ0D= 2.15±0.2 in units of log(M/pc2). We also show that the observed kinematics of Local Group dwarf spheroidal galaxies are consistent with this value. Our results are obtained for galactic systems spanning over 14 mag, belonging to different Hubble types and whose mass profiles have been determined by several independent methods. In the same objects, the approximate constancy of µ0D is in sharp contrast to the systematical variations, by several orders of magnitude, of galaxy properties, including ρ0 and central stellar surface density.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): galaxies: kinematics and dynamics - galaxies: spiral - dark matter

Simbad objects: 22

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2020.11.23-18:49:49

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