File talk:Evolved star fusion shells.png

Neon and Oxygen

Note:

Neon and Oxygen are possibly the wrong way around on this diagram. The elements should be getting heavier as they get closer to the core, but on the diagram, Neon is shown as being before Oxygen. —the preceding unsigned comment is by 81.79.144.1 (talk • contribs)

They're in the same order as the illustration on the Bad Astronomy article about SN 1987A, and a picture on this lecture from Ohio State (in the Silicon Burning section). The table on NASA education page shows the same order. Also the following reference shows Neon burning occurs before Oxygen:

• Woosley, S. E.; Heger, A. (2002). "The Evolution and Explosion of Massive Stars" (PDF). Reviews of Modern Physics 74 (4): 1015-1071. Retrieved on 2007-05-30.

Thanks. — RJHall 14:45, 30 May 2007 (UTC)

No User:81.79.144.1, the image is correct. Neon fusion shall be above oxygen fusion, because it occurs at lower temperatures and pressures. The layers are not directly reflecting any enrichment of the elements in question, just the mode of fusion, and neon fusion occurs before and above oxygen fusion. Rursus (talk) 06:44, 11 May 2009 (UTC)

Wrong replacement

That guy Rursus that placed the image Evolved star fusion shells.svg as a replacement for this file made it wrong. (I'll talk to him!) This image is to be used for early star SN progenitors, f.ex. Sanduleak -69° 202a pre-SN for SN 1987A, while Rursus'es one images classical SNII progenitors. If anyone feel for removing the SVG replacement template from the page, then I believe that Rursus-guy won't object. Rursus (talk) 06:48, 11 May 2009 (UTC)