view Abstract Citations (29) References (5) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Motions in Barred Spiral Galaxies. V. The Velocity Field in NGC 5383. Burbidge, E. Margaret ; Burbidge, G. R. ; Prendergast, K. H. Abstract Velocities have been measured by means of emission lines in the nuclear region and in knots in the arms of the barred spiral galaxy NGC 5383. On the assumption that the galaxy has one plane of symmetry and a circular outer contour in this plane, an estimate of the orientation of the galaxy to the line of sight has been made. Spectra taken with the slit along the bar (making an angle with the presumed line of nodes) show the velocities not to be symmetrical with respect to the center. The velocities in the nuclear region are linear when plotted against distance from the center, but lie (on all spectra) about 75 km/sec less than the mean from velocities in the arms on either side. If only motions in the plane of the galaxy occur, this implies large streaming gas velocities in the arms. Mternatively, may occur in the gas in the nuclear region; if these are uniform and outward and if dust obscures gas on the far side, a z-velocity 100 km/sec could lead to the observed depression of the velocities in the nuclear region. A third possibility is that the arms do not lie in the same plane as the bar, so that the galaxy possesses more than one plane of symmetry. If the linear plot of velocity in the nuclear region is interpreted as due to rotation alone and the orientation of the galaxy is as deduced from the outer contour, the mass of the nuclear region is 7 X 109 M0 On the assumption that velocities at the ends of the bar are purely rotational, a Keplerian mass estimate of the galaxy interior to the points measured at the ends of the bar is about 5 X 1010 M0. Publication: The Astrophysical Journal Pub Date: November 1962 DOI: 10.1086/147430 Bibcode: 1962ApJ...136..704B full text sources ADS | data products SIMBAD (1) NED (1) Related Materials (6) Part 1: 1960ApJ...132...30B Part 2: 1960ApJ...132..654B Part 3: 1960ApJ...132..661B Part 4: 1962ApJ...136..119B Part 6: 1964ApJ...140...85B Part 7: 1964ApJ...140...94R
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Jul 1, 1964
V C Rubin + 2
Open Access