On Mon, 19 Feb 2007 00:10:58 -0000, "George Dishman"
wrote:


"Henri Wilson" HW@.... wrote in message
.. .
On Sun, 18 Feb 2007 09:31:57 -0000, "George Dishman"

wrote:

You could ask in sci.astro.research, all you need
is the velocity curve and a paper that says "No
brightness variation has been detected to the level
of *** mag."

There are plenty of reason why no brightness variation will be expected.

Such as?

Too close, moving too slowly...
If two similar stars are orbiting in nearly circular orbits, their
contributions to a combined brightness curve will just about nullify each
other.
I tried to expain this to Andersen in the case of HD10875


That would suggest a non-linear relation between (v-c/n)
and dv/ds. It still needs to be first order at zero but
perhaps a third order component? Gravity certainly isn't
going to do anything for you.

I'm not so sure of that.

I am.

But you don't really know.


It can only be the speed.

...and maybe distance between 'pulses'. Similar really.

Not in the slightest, the phrase "distance between"
has no meaning for a single pulse, speed has. The
only way you can avoid multiple pulses is if the
speed difference decays in much less than the
critical distance.

I'm concerned by the fact that light from one part of the orbit will be
'unified' before light from another part is even emitted. I can see a problem
there but haven't been able to work out exactly what it might be.

After all,
you cannot unify light with other light that hasn't yet been emitted.

Nothing of that kind was suggested. The pulsar is an
obvious example, each pulse is 45 us or 13.5 km long
and they start out 2.95 ms or 885 km apart. The highest
frequency shift is 30.54 mHz so over the entire journey,
the faster pulses only catch up by 79.7 m. You explained
this yourself in another post:

"Henri Wilson" HW@.... wrote in message
...

The light from these stars still travels throgh similar quality space,
even if it emitted months later.

Eventually the pulses change speed (asymptotically as has
been said) to c/n but it is the 'quality of space' as you
nicely put it that is responsible, not another bunch of
photons 885 km away, and bear in mind too that the speed
doesn't just come to match adjacent pulses but _all_ the
pulses emitted over the 1.5 day orbit end up at exactly
the same speed.

There's plenty time for that to happen, you figure for
the critical distance is 8 light years and the system is
over 3000 light years away.

there is a lot to be done yet George.

You can play with hypothetical theories for ever.

particularly when it keeps producing the right results.


George