Testwiki:Articles for deletion/Sigma (cosmology)

The following discussion is an archived debate of the proposed deletion of the article below. Please do not modify it. Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a deletion review). No further edits should be made to this page.

The result was delete‎__EXPECTED_UNCONNECTED_PAGE__. Liz ^{Read! Talk!} 21:06, 27 June 2024 (UTC)

Sigma (cosmology)

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This article lacks a definition, focus, and citations, and some parts (e.g., the opening sentence) read very confusingly. All references I can find to a sigma in cosmology in the literature describe velocity dispersion – which incidentally is linked in the closest thing to a definition present in the article – or ordinary standard deviation, so it's not clear what this page should be about. Even if this is a real, distinct concept from other types of sigma, WP:TNT may still be needed. ^Complex/_Rational 17:35, 20 June 2024 (UTC)

• Note: This discussion has been included in the list of Astronomy-related deletion discussions. WCQuidditch ☎ ✎ 18:40, 20 June 2024 (UTC)
• Comment: I'll take a guess that it is about the M–sigma relation, for which there is a substantial amount of publication. Praemonitus (talk) 03:21, 21 June 2024 (UTC)
• Blank and Redirect per Praemonitus to M–sigma relation. PianoDan (talk) 18:34, 21 June 2024 (UTC)

Delete I've been sold by the other commments. PianoDan (talk) 16:54, 27 June 2024 (UTC)

• Delete: "sigma" is used in so many different contexts in astronomy (for the scatter in some property), we should not redirect it to M-sigma relation. — Preceding unsigned comment added by Parejkoj (talk • contribs) 19:02, 23 June 2024 (UTC)
• Delete: As noted by others, the letter sigma is used to mean a lot of different things in astronomy. This article refers specifically to sigma as meaning stellar velocity dispersion, which is covered elsewhere in other articles, and in any case this article is so poorly written that there's nothing worth salvaging. Aldebarium (talk) 16:04, 26 June 2024 (UTC)
• Delete The content is bad, and it doesn't make sense to try fixing it. $\sigma$ is just a Greek letter, and any field of science is going to use a Greek letter in more than one way; all the more so in this case because $\sigma$ is a common convention for standard deviation, so it's likely to be the symbol for the spread in any quantity. So, there's no uniquely good redirect target. XOR'easter (talk) 01:34, 27 June 2024 (UTC)

The above discussion is preserved as an archive of the debate. Please do not modify it. Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a deletion review). No further edits should be made to this page.