The rotation curve of NGC 3115

Details The rotation curve of NGC 3115 The rotation curve of NGC 3115

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199..586w&link_type=abstract

Astrophysical Journal, vol. 199, Aug. 1, 1975, pt. 1, p. 586-590.

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Computation

15

Absorption Spectra, Frequency Shift, Galactic Rotation, Line Spectra, Galactic Nuclei, Mass Ratios, Radial Velocity, Ubv Spectra

Scientific paper

A rotation curve is derived for the S0 galaxy NGC 3115 from its absorption-line spectrum. The central velocity is 728 (+ or - 9) km/sec. The rotation curve rises to 260 km/sec at 25 arc sec from the nucleus, and remains constant at that value to the limit of the measurements. A rough computation of the mass gives 24 billion solar masses out to 3.4 kpc, and a mass-to-light ratio of 20 to the same radius.

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