Talk:Stellar nucleosynthesis

message: Just to remember some of the missing bits:
* agreement with observation
** elements aboundance
** luminosity of star
* what's up with very small and very massive stars
* solar neutrino & solar neutrino problem
* link to stellar evolution
* ref to Helium flash
* Supernova nucleosynthesis (TODO)
* Big bang nucleosynthesis (too expand, lot to say!)
* Nucleosynthesis (stubby, to expand)
* should be better to merge most of this: easy to make comparison/odd Z/double odd Z/magic number/...
* CN cycle in CNO cycle
* Carbon burning process, Oxygen burning process, Silicon burning process are just drafts
:-- Looxix 01:25 Apr 28, 2003 (UTC)
And the magnesium-burning process(es).32ieww (talk) 03:22, 10 February 2017 (UTC)
thread_title: To-do list

message: is there anything that a nineth grade science student could do for a science fair, that is in two days? We had learned that different elements burn into different colors and are there any household items that can be burnt that will not be dangerous to anyone? Tank you, Arden Portis —The preceding unsigned comment was added by 65.73.179.110 (talk) 23:03, 17 April 2007 (UTC)
thread_title:  I was wondering 

message: This article was automatically assessed because at least one WikiProject had rated the article as start, and the rating on other projects was brought up to start class. BetacommandBot 10:04, 10 November 2007 (UTC)
thread_title:  WikiProject class rating

message: In the wikipage for Iron_peak, it states that the elements lighter than Iron are created in stellar nucleosynthesis.  Is this what you mean when you say that stellar nucleosynthesis creates the nuclei for heavier elements?  Rhetth (talk) 03:41, 10 January 2008 (UTC)
thread_title:  elements created during stellar necleosynthesis 

message: I don't know, but I have seen it on History Channel's Universe series; the photon creation (light creating) in stars from the reactions inside the star
Plus the time one photon takes to escape the star's core
Thanks  —Preceding unsigned comment added by 82.201.181.249 (talk) 21:10, 17 March 2008 (UTC)
thread_title: Photon creation

message: The History section starts with In 1920, Arthur Eddington ... was the first to suggest that stars obtained their energy from nuclear fusion of hydrogen to form helium. However this article on Why the Stars Shine (see p.6-8) says that Eddington developed an initial suggestion by Jean Perrin in 1919. Dirac66 (talk) 02:38, 19 April 2013 (UTC)
thread_title:  Eddington or Perrin? 

message: I'm completely sure that magnesium is involved in a burning reaction of its own, I'm not sure what it is, so someone should create a page about it. I would love to be bold, but I can't due to this. 32ieww (talk) 03:18, 10 February 2017 (UTC)
replies: text: Beyond Carbon, created by the triple-alpha process, heavier elements are largely created in the core by alpha capture. Thus the predominant elements in evolved stars are Oxygen, Neon, Magnesium, etc, with the intervening odd-number elements created in smaller quantities by less common reactions. There is a list of most of the relevant reactions, which usually have their own articles, but some description in this article would be helpful. Lithopsian (talk) 15:09, 24 February 2017 (UTC)
thread_title:  Magnesium burning 

message: 1H2D                                                                      	                                                                          	                                                                          	                                                                          	                                                                          	
                                                                     	1H2D                                                                      	H                                                                         	+                                                                         	H                                                                         	=                                                                         	D
                                                                     	1H2D                                                                      	H                                                                         	+                                                                         	H                                                                         	=                                                                         	D
                                                                     	1H2D                                                                      	D                                                                         	+                                                                         	D                                                                         	=                                                                         	He
                                                                     	1H2D                                                                      	D                                                                         	+                                                                         	D                                                                         	=                                                                         	He
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                                                                     	4He                                                                       	                                                                          	                                                                          	                                                                          	                                                                          	
                                                                     	4He                                                                       	He                                                                        	+                                                                         	He                                                                        	=                                                                         	Unstable
                                                                     	4He                                                                       	He                                                                        	+                                                                         	He                                                                        	=                                                                         	Unstable
                                                                     	4He                                                                       	He                                                                        	×                                                                         	3                                                                         	=                                                                         	C
                                                                     	4He                                                                       	He                                                                        	×                                                                         	3                                                                         	=                                                                         	C
                                                                     	4He                                                                       	He                                                                        	+                                                                         	C                                                                         	=                                                                         	O
                                                                     	12C                                                                       	He                                                                        	+                                                                         	C                                                                         	=                                                                         	O
                                                                     	12C                                                                       	C                                                                         	+                                                                         	C                                                                         	=                                                                         	Mg
                                                                     	12C                                                                       	C                                                                         	+                                                                         	C                                                                         	=                                                                         	Mg
                                                                     	12C                                                                       	C                                                                         	+                                                                         	O                                                                         	=                                                                         	Si
                                                                     	16O                                                                       	C                                                                         	+                                                                         	O                                                                         	=                                                                         	Si
                                                                     	16O                                                                       	O                                                                         	+                                                                         	O                                                                         	=                                                                         	S
                                                                     	16O                                                                       	O                                                                         	+                                                                         	O                                                                         	=                                                                         	S
                                                                     	16O                                                                       	O                                                                         	+                                                                         	Mg                                                                        	=                                                                         	Ca
                                                                     	24Mg                                                                      	O                                                                         	+                                                                         	Mg                                                                        	=                                                                         	Ca
                                                                     	24Mg                                                                      	                                                                          	                                                                          	                                                                          	                                                                          	
                                                                     	24Mg                                                                      	                                                                          	                                                                          	                                                                          	                                                                          	
                                                                     	24Mg                                                                      	Mg                                                                        	+                                                                         	S                                                                         	=                                                                         	Fe
                                                                     	28Si32S                                                                   	Mg                                                                        	+                                                                         	S                                                                         	=                                                                         	Fe
                                                                     	28Si32S                                                                   	Si                                                                        	+                                                                         	Si                                                                        	=                                                                         	Fe
                                                                     	28Si32S                                                                   	Si                                                                        	+                                                                         	Si                                                                        	=                                                                         	Fe
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                                                                     	56Fe                                                                      	                                                                          	                                                                          	                                                                          	                                                                          	
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N and Ne are produced when the outer layers of the star become convective.	N and Ne are produced when the outer layers of the star become convective.	N and Ne are produced when the outer layers of the star become convective.	N and Ne are produced when the outer layers of the star become convective.	N and Ne are produced when the outer layers of the star become convective.	N and Ne are produced when the outer layers of the star become convective.	N and Ne are produced when the outer layers of the star become convective.
Just granpa (talk) 18:14, 15 July 2018 (UTC)
thread_title:  Nucleosynthesis of the most common elements 

message: The history section of the article asserts that Hoyle's 1954 papers was the "first work of stellar nucleosynthesis". I don't doubt that it was important, but this assertion of "first" comes after several paragraphs discussing earlier work on stellar nucleosynthesis, though that work was for lighter elements. Anyway, it appears to me that the description of Hoyle's work needs to be nuanced. Attic Salt (talk) 14:17, 18 July 2019 (UTC)
replies: text: That sentence was added here during a series of edits which pushed a fairly focused point of view, and a definition of "stellar nucleosynthesis" that is no longer expressed in the opening sentence, and were in large part reverted or modified later.  The nuance would be a definition of stellar nucleosynthesis as a theory to explain the abundance of the elements and "first work" as the earliest cohesive attempt to do that.  Hoyle's earlier work didn't really attempt to do that, only to explain that (many) heavy elements could be produced in stars (and supernovae).  The papers prior to that are focused on the energy production in main sequence stars, and so incidentally on the production of helium, and even more incidentally of carbon, nitrogen, and oxygen.  Lithopsian (talk) 15:44, 18 July 2019 (UTC)
replies: text: I removed that sentence and another one that I couldn't figure out how to fix. Attic Salt (talk) 18:50, 18 July 2019 (UTC)
replies: text: Still seems to need heavy copyedit.  I took a look at nucleosynthesis, sort of the parent article which I'd not really paid any attention to before.  It is in better shape than this or supernova nucleosynthesis, but I still ended up doing significant work on the lead.  Probably should have looked at the rest of the article first and them summarised it in the lead!  Lithopsian (talk) 12:28, 19 July 2019 (UTC)
replies: text: Yes, this article needs quite a bit of work. The history section is confusing on subject of Hoyle. Clear distinction between "normal" nucleosynthesis and supernova nucleosynthesis is needed -- in my interpretation (and that is all that it is), supernova nucleosynthesis is a subset of stellar nucleosynthesis. Attic Salt (talk) 12:37, 19 July 2019 (UTC)
replies: text: Whatever definition we run with here and in supernova nucleosynthesis should be reflected in nucleosynthesis.  Explicitly, since that article covers both of them.  Currently, they are treated as essentially separate processes in nucleosynthesis, although bear in mind such terms as explosive nucleosynthesis which blur the boundaries - or perhaps which offer a different way to set the boundaries.  Possibly we should support the definitions better with references.  Also, at the risk of introducing confusion, we might discuss different historical slants; when stellar nucleosynthesis was first introduced as a thing, it was a proposed theory to explain the creation of the elements, whereas now we tend to treat it as a given, a process that is actually happening.  Similarly, supernova nucleosynthesis was first introduced as a slight extension to stellar nucleosynthesis when it wasn't even really understood what a supernova was.  Now it is a given, a process to be explained and quantified.  Anyway, can't go wrong with references to what a few books say they are.  Lithopsian (talk) 14:20, 19 July 2019 (UTC)
thread_title:  The first work of stellar nucleosynthesis? 

message: "a higher–mass star will eject mass via a sudden catastrophic event called a supernova." Please someone remove "catastrophic", before I replace it with "wonderful" ... or "life giving and star formation inducing". Darsie42 (talk) 19:07, 8 August 2022 (UTC)
thread_title:  catastrophic 

message: If I'm reading it correctly, the Periodic Table showing the origin of elements has an error:  as it says in the Technetium Wikipedia article --
Naturally occurring technetium is a spontaneous fission product in uranium ore and thorium ore (the most common source), or the product of neutron capture in molybdenum ores.
Yet the Table in this article appears to indicate that technetium is only produced artificially. Dismalscholar (talk) 22:23, 3 June 2024 (UTC)
thread_title:  Technetium on the Periodic Table