Talk:Supernova remnant

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[edit] Miscellany

From the article: "A few other well-known, older, supernova remnants are the Crab Nebula, a remnant of a relatively recent explosion (AD 1054); Tycho (SN 1572), a remnant named after Tycho Brahe, who recorded the brightness of its original explosion (AD 1572)"

Assuming those dates reflect when the light from these supernovae were first visible on Earth, shouldn't the dates for the explosions be more like n-d=n`where n is the date listed and d is the distance (in light years) from Earth to the site of the supernova? Azmo23

Actually, the proper English is either, "it ceases" or "it may cease," likewise "it undergoes" or "it may undergo". We need to either change it back or eliminate the "may". :) -- April

I slipped on the "cease" i changed it back. However, i don't agree with the other. I don't see the "may" of "may accumulate" affecting the "reaches" and "undergoes". I might be wrong, but if it has to be changed, both reaches and undergoes must change. AstroNomer

Agreed, that's right. dang, this grammar stuff is tricky. :) -- April

[edit] Redo/expand this page

I'll redo, expand this page when I get a moment, it should really have some stuff on the Sigma-D relation and the Selection effects etc. Could do with links to Molonglo Observatory Synthesis Telescope, Parkes 64m Telescope and Effesberg, since they are the big contributors to finding SNRs (radio sky surveys). Also Dominion Radio Astrophysical Observatory would be good. Am newbie so not sure how to do much yet, but don't mind if anyone jumps in and adds those first. Will write some more sciency stuff on it laters.

If I remember, Sigma-D turned out to basically be an observational effect, not a real diagnostic, much to everyone's disappointment. At any rate, tread very carefully in discussing it, and make sure your background is up to date. Mordecai-Mark Mac Low 00:56, 18 January 2006 (UTC)

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