It complicates it some I am not sure "vastly" is the correct characterization, the gas only will slightly affect to total luminosity. It also does not apply to all Cephieds, they don't mention the scale of the error. But, I doubt it adds much more than 5% error. As a disclaimer I am no statistical mathematician.
No, it doesn't eliminate the use of Cepheids, but it vastly complicates
matters. The distance scale needs to be adjusted, not thrown out. -- Joe
--- On Sat, 1/15/11, erikhansen@thebluezone.net <erikhansen@thebluezone.net> wrote:
From: erikhansen@thebluezone.net <erikhansen@thebluezone.net> Subject: Re: [Utah-astronomy] Cepheids To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Saturday, January 15, 2011, 12:31 PM
I do hope you all read the link Patrick provided to the NASA release on Cepheids in his newsletter. Thanks to Patrick for his continued e-mailing of news.
It does seem, it is just saying to examine the data more carefully and that the distance data provided by Cepheids is still a good ballpark figure. I does not eliminate them from distance measurements.
Hi,
Great article on Cepheid Variables. Your explanation is clear and understandable for the masses. Keep up Your great blog.
Mark
________________________________ From: Joe Bauman <josephmbauman@yahoo.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Sat, January 15, 2011 1:54:19 AM Subject: [Utah-astronomy] Cepheids
Hi Friends, My latest blog, about news concerning Cepheid variables and featuring a couple of great pics Patrick took, is up. It's at:
http://www.deseretnews.com/blog/47/Nightly-news-astronomy.html
Any comments are greatly appreciated. Thanks, Joe
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