Talk:Instability strip

"Nearly vertical"

The strip doesn't look nearly vertical to me. More vertical than horizontal, sure, but not nearly vertical. Jruderman (talk) 01:27, 6 April 2008 (UTC)

The HR diagram is a poor representation, but in any case the angle of the instability strip depends on the horizontal and vertical scales used, so calling it nearly vertical is perhaps not for the best. Lithopsian (talk) 11:42, 24 February 2013 (UTC)

Yeah, it's not vertical at all. It angles significantly to the right, since the brighter variables in these groups are cooler. There are some actual vertical strips on the H-R plot (eg the LBV low-temp excursion zone at ~8000K) but this is not one of them. -- bornLoser (talk) 13:04, 19 May 2015 (UTC)

ZZ Ceti Instability strip

There seems to be much confusion here. I know nothing about white dwarfs so I had to do some research. The "ZZ Ceti instability strip" is not the same instability strip as the one described here. The reference provided seems like a very good reason not to study with SAO! Coincidentally, the DAV instability strip lies near an extension of the classic instability strip, the DBV and DOV strips not so close. They should all be treated separately, or at least very strongly differentiated from the classic instability strip. I'm going to reduce mention of the pulsating white dwarfs to a quick aside in this article. Someone with more knowledge can enlarge it, or perhaps produce a separate article. Lithopsian (talk) 11:51, 24 February 2013 (UTC)

Yeah, the ZZ Ceti's, Beta Cepheids, and others are completely unrelated. I changed the wording of the introduction to make it a bit clearer that "instability strip" is ambiguous, since there's more than one region that goes by that name. Though when people say just "instability strip" they usually mean the one with the Cepheids in it, the others are important as well. Though i'm not sure whether they should have separate articles, sections on the H-R diagram article, etc. Some of these regions (eg the cepheid strip, horizontal branch, hayashi forbidden zone, H-D limit, LBV zones, etc) are clearly independent phenomena that deserve their own pages, but some (eg beta cepheid area) are just "places on the H-R diagram where X Y stars tend to be". -- bornLoser (talk) 13:14, 19 May 2015 (UTC)