Galaxy halo/disk mass ratios estimated from a local disk stability criterion

Details Galaxy halo/disk mass ratios estimated from a local disk stability criterion Galaxy halo/disk mass ratios estimated from a local disk stability criterion

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pazh...11..730z&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 11, Oct. 1985, p. 730-736) Soviet Astronomy Letters (ISSN 0360-0327), vol. 11, Sept.-Oc

Astronomy and Astrophysics

Astronomy

5

Disk Galaxies, Galactic Structure, Mass Ratios, Galactic Rotation, Magellanic Clouds, Stellar Motions

Scientific paper

Morozov's criterion for the stability of a collisionless disk of stars yields lower limits on the mass ratio of the spheroidal component (bulge + halo) and the disk for several galaxies having a measured rotational velocity and disk-population velocity dispersion. In many galaxies the halo mass seems to be comparable with the disk mass, although in late-type galaxies (such as NGC 4062 or the LMC) it may be quite small.

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