Why are the 'Fixed Stars' so FIXED?

On Thu, 15 Mar 2007 18:11:33 -0000, "George Dishman"
wrote:


"Jerry" wrote in message
roups.com...
On Mar 14, 8:47 am, "George Dishman" wrote:
On 14 Mar, 12:46, "Jerry" wrote:
...
Here is a 1969 publication by Bappu et al.
http://adsabs.harvard.edu/abs/1969MNRAS.142..295B

Excellent, thanks. Given the importance of Cepheids,
I'm a surprised there aren't more recent studies, or
is that just the latest you know of?

A little googling found this excellent reference:
Physical properties of the Cepheids RT Aurigae and SZ Tauri
Authors: Gieren, W. P.
Astronomy and Astrophysics (ISSN 0004-6361),
vol. 148, no. 1, July 1985, p. 138-144.

http://articles.adsabs.harvard.edu//...00141.000.html

Got it, thanks.

I also found several additional likely references in subscriber-
access journals. I'll check on them the next time that I visit
the main campus library.

Thanks for the data Jerry, it will be intersting to
see what numbers Henry can come up with to fit those,
though it is already clear he will get a poor fit at
best.

By futzing around with his parameters, Henri can "sort of" match
the shape of the RT Aur radial velocity curve (to the point
where Henri will claim a decent match, but no objective observer
would agree), but even Henri will admit that he can't match the
phasing relative to the luminosity curve.

Henry should enter the values from the above paper
and get his program to calculate the residuals.
Anything else is just handwaving. Now that you have
found the reference, he really has no excuse not to.

The radial velocity curve is virtually the same as the brightness curve.

You and I now know that George. ...and that's what I get.


George



"When a true genius appears in the world, you may know
him by this sign, that the dunces are all in confederacy against him."
--Jonathan Swift.