Motions in the nucleus of the barred spiral galaxy NGC 1097

Details Motions in the nucleus of the barred spiral galaxy NGC 1097 Motions in the nucleus of the barred spiral galaxy NGC 1097

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195...39m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 195, Apr. 1981, p. 39-49.

Astronomy and Astrophysics

Astronomy

17

Barred Galaxies, Galactic Nuclei, Galactic Rotation, Galactic Structure, Spiral Galaxies, Radial Velocity, Star Distribution

Scientific paper

A two-dimensional grid of velocity measurements has been made over the ionized nuclear regions of the (Sérsic-Pastoriza) barred, spiral galaxy NGC 1097.
Improved values of the orientation parameters have been obtained and unusual velocity features identified. Radial flows and expansions, superimposed on the circular motions of 356 km s-1 are invoked to explain the observations. The presence of a dense inner nucleus with angular dimensions below the best seeing disc is also proposed. Within this compact region the mean matter density is ≥ 4.4 × 103 Msun pc-3 for a diameter of ≲ 78 pc.

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