Stable polar gas disks in triaxial S0 galaxies

Details Stable polar gas disks in triaxial S0 galaxies Stable polar gas disks in triaxial S0 galaxies

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...263l..51s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 263, Dec. 15, 1982, p. L51-L54.

Astronomy and Astrophysics

Astrophysics

68

Disk Galaxies, Galactic Structure, Mass Distribution, Orbital Elements, Polar Orbits, Angular Momentum, Circular Orbits, Hamiltonian Functions, Orbit Calculation, Precession

Scientific paper

It is shown that the assumption of triaxiality in a nontumbling galaxy makes it possible to explain spindle galaxies as S0 galaxies with a gas disk or ring perpendicular to the stellar disk of the galaxy. The introduction of small deviations from axial symmetry allows for the availability of a significant cross section for the capture of gas into a polar orbit. This cross section is available in galaxies for which the tumble period of the surface figure is much longer than the orbital period of a polar disk; the existence of a polar disk sets an upper limit on the rate at which a galaxy tumbles. This interpretation means that slowly tumbling triaxial galaxies exist among S0 galaxies.

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