Hello, <br /> I guess I am a few days late on this thread, but that never stopped me before.<br /><br />I don't know if this will affect your ideas on galaxy rotation, but are you aware that not all galaxies are spriral in shape ? <br /><br />
the Hubble classification was originally designed solely to describe galaxies' appearance on photographs! but is still widely used because (1) it is simple and thus accomodates the great majority of bright galaxies and (2) it is our great fortune that it correlates well with astrophysical quantities like bulge/disk ratio, gas content, star-forming properties, spectrum, chemical composition of ISM.<br /><br />Also see
Near-Infrared Galaxy Morphology Atlas from the Abstract <br /><br />"We present a representative sample of near-infrared (1 - 2 µm) images spanning the Hubble galaxy morphology classification sequence. The images come from the Two Micron All Sky Survey, ranging in brightness between 7 < Ks < 13.5 mag, and the morphological classifications from the NASA/IPAC Extragalactic Database (NED). We differentiate between elliptical, normal and barred spirals, compact, dwarf, peculiar and AGN/Seyfert-type galaxies. This image atlas serves as a qualitative guide to the appearance of galaxies at wavelengths that penetrate the obscuring veil of dust, as well as provide a window to the older population of stars that dominate the observed light at 2 µm, including large-scale bar features. We show that central surface brightness and integrated flux may be used to discriminate spheroid and early-type spirals from late-type spirals. The optical and near-infrared properties are compared." by T.H.Jarrett<br /><br />Interesting stuff, this may not answer any of your questions but you said you wanted links.<br /><br />fingle<br /><br /><img src="/images/icons/smile.gif" /><br /> <div class="Discussion_UserSignature"> </div>
Basic Error: The accelerating Universe conclusion - reason
UFO whistleblowers tell Congress 'we are not alone in the cosmos' (video)
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