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The Rotation and Mass of NGC 3521.

1964; IOP Publishing; Volume: 139; Linguagem: Inglês

10.1086/147845

1538-4357

E. M. Burbidge, G. R. Burbidge, D. J. Crampin, Vera Rubin, K. H. Prendergast,

History and Developments in Astronomy

view Abstract Citations (29) References (7) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Rotation and Mass of NGC 3521. Burbidge, E. Margaret ; Burbidge, G. R. ; Crampin, D. J. ; Rubin, V. C. ; Prendergast, K. H. Abstract NGC 3521 is an Sb galaxy with thin, much-wound spiral arms, similar to NGC 5055. The rotation- curve was obtained from measures of the Ha and [N ii] X 6583 emission lines. The observations extend to about 180" along the major axis on one side of the nucleus and 120" on the other side. Measures from a spectrum taken with the slit at 450 to the major axis were also used, after projection onto the major axis. An integral equation was solved for the mass distribution; for assumed values of c/a ranging from 1/4 to 1/15, the mass within about 170" of the center is about 8 x 1010 Mo. The mass-to-light ratio from the photographic magnitude is >4.0. The rotation-curve, density distribution, and mass-to-light ratios are similar to those found for NGC 5055. The central density was estimated from absorption-line measures on a higher-dispersion, larger-scale spectrum obtained at Lick to be > gm/cm3. Publication: The Astrophysical Journal Pub Date: May 1964 DOI: 10.1086/147845 Bibcode: 1964ApJ...139.1058B full text sources ADS | data products NED (2) SIMBAD (1)