Dynamics of early-type galaxies. III - The rotation curve of the S0 galaxy NGC 4762

Details Dynamics of early-type galaxies. III - The rotation curve of the S0 galaxy NGC 4762 Dynamics of early-type galaxies. III - The rotation curve of the S0 galaxy NGC 4762

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...219..404b&link_type=abstract

Astrophysical Journal, Part 1, vol. 219, Jan. 15, 1978, p. 404-407. Research supported by the Consiglio Nazionale delle Ricerch

Astronomy and Astrophysics

Astrophysics

8

Galactic Rotation, Radial Velocity, Spiral Galaxies, Angular Momentum, Galactic Structure, Velocity Distribution

Scientific paper

The rotation curve of the flat S0 galaxy NGC 4762 is derived from measurements of the Ca II H and K absorption lines out to a distance of 1.1 arcmin (5 kpc) from the nucleus. This curve shows a moderate central gradient and a steady increase up to a value of 165 km/s, with no definite indication that the turnover velocity has been reached. Using a simple model, it is estimated that the mass up to the last observed point is 35 billion solar masses. The corresponding mean mass-to-light ratio is 4. It is pointed out that S0's and spiral galaxies appear to possess similar amounts of angular momentum.

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