On the flattening of dark haloes

Details On the flattening of dark haloes On the flattening of dark haloes

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.226..149b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 226, May 1, 1987, p. 149-156.

Astronomy and Astrophysics

Astronomy

46

Dark Matter, Flattening, Galactic Structure, Halos, Radial Distribution, Self Consistent Fields, Spatial Distribution

Scientific paper

Approximately self-consistent disk-halo systems with Stackel potentials are used to investigate the flattening of a massive galactic halo. If the kinematics of the objects that bear the mass of the halo are similar to those of extreme Population II stars, then: (1) the massive halo should have an axis ratio b/a of less than about 0.5; (2) most of this flattening will be intrinsic to the halo, rather than a reflection of the gravitational attraction of the disk; and (3) the density of the dark halo near the sun will be two or more times that anticipated if the halo were spherical. Such an increase in the local halo density would reduce by up to half the discrepancy between the dynamically measured local disk surface density and inventories of the solar neighborhood compiled from electromagnetic measurements.

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