A detailed study of the ionized hydrogen distribution and of the velocity field of the barred galaxy NGC 7741

Details A detailed study of the ionized hydrogen distribution and of the velocity field of the barred galaxy NGC 7741 A detailed study of the ionized hydrogen distribution and of the velocity field of the barred galaxy NGC 7741

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...241..375d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 241, no. 2, Jan. 1991, p. 375-388. Research supported by INSU and AN SSSR.

Astronomy and Astrophysics

Astrophysics

11

Barred Galaxies, Hydrogen Ions, Ionized Gases, Velocity Distribution, Astronomical Catalogs, Astronomical Models, Astronomical Photometry, Fabry-Perot Interferometers, H Ii Regions, Radial Velocity

Scientific paper

A photometric catalog of 306 H II regions of NGC 7741 is presented with an analysis of the distribution of the fluxes. A total of 2500 radial velocities of the ionized gas have then been measured with a scanning Fabry-Perot interferometer and a two-dimensional counting system. A dynamical model is derived, which reasonably fits the velocity field, for a bar to disk mass-ratio inside the radius of the bar of roughly 30 percent.

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