THE INTERNAL KINEMATICS OF THE MOST LUMINOUS H II REGIONS IN M100

N. S. P. Sabalisck , M. Rozas, J. E. Beckman , J. H. Knapen, PASA, 15 (1), 161
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Results

Figure 1 (Right) shows a set of spectra from individual H II regions: intensity v. radial velocity. From spectra of this type we computed the internal velocity dispersions of the principal components in intensity of all the regions measured (the brightest 200 out of 2000 identified in M100). These are shown plotted against Htex2html_wrap_inline101 luminosity in figure 1 (Left). We can see a broad scatter, but the upper envelope is clearly linear in the log-log plot. Its slope is tex2html_wrap_inline113, which agrees with the slope of L versus tex2html_wrap_inline103 found by Arsenault et al. (1990) for the regions of M100 with highest surface brightness. There is a 10% random error in each specific tex2html_wrap_inline103 value and a basic systematic error of about 2.5 Km stex2html_wrap_inline109.


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