The kinematics of the nuclear spiral of the barred galaxy NGC 1512

Details The kinematics of the nuclear spiral of the barred galaxy NGC 1512 The kinematics of the nuclear spiral of the barred galaxy NGC 1512

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97...56l&link_type=abstract

Astronomy and Astrophysics, vol. 97, no. 1, Apr. 1981, p. 56-62.

Astronomy and Astrophysics

Astrophysics

14

Astronomical Photography, Barred Galaxies, Galactic Nuclei, Galactic Rotation, Galactic Structure, Radial Velocity, Spiral Galaxies, Astronomical Spectroscopy, Cosmic Dust, H Alpha Line, Interstellar Gas

Scientific paper

Radial velocities have been measured for the tight spiral in the nucleus of NGC 1512. For the orientation of the system given by Hawarden et al. (1979) with the position angle of the line of nodes φ = 265° we find expansional motions of 55 km s-1. For φ = 245° circular motions would fit the observations. A density wave picture with gas streaming inwards at a small angle to the spiral arms would require φ to be decreased to 238°.
The radial velocity and rotation of NGC 1510 has been measured from one spectrum.

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