Re: OT: alien radio signals

Martin Brown <'''newspam'''@nonad.co.uk> wrote:

On 27/11/2024 12:54, Liz Tuddenham wrote:

Bill Sloman <bill.sloman@ieee.org> wrote:
 

On 27/11/2024 6:58 pm, Jan Panteltje wrote:

A 2.9 hr Periodic Radio Transient with an Optical Counterpart:
https://iopscience.iop.org/article/10.3847/2041-8213/ad890e
 
No good movies and music yet...(decoded that is)
But at least technical details such as frequency etc..
Some very peculiar.

 
A close-orbiting pair of white dwarf stars could be doing lots of
peculiar stuff, without any help from aliens.

 
Would a cluster of three or more be stable?  If so:
 
Dit-dit-dit dah
Dit-dit-dit dah
Dit-dit-dit dah
 
or even:
dah-dit-dah-dit     dah-dah-dit-dah

 
3 body problem remains unsolved and probably insoluble analytically
apart from a special case of fairly massive stars in mutual orbit and a
small mass at one of the two stable L4, L5 Lagrange points like the
Trojan asteroids locked in equilateral triangles with Jupiter and the sun.
 
https://en.wikipedia.org/wiki/Lagrange_point#Stability
 
Ultimately in the very long term it is thought that for three (or more)
bodies in general three of them will get close enough together at some
point that the smallest one gets expelled and the others will end up
more tightly bound together. Ovenden's conjecture also AFAIK still
unproven is that the gravitational dynamics will perturb their orbits in
such a way as to put off the evil day for as long as possible.
 
I can't find anything suitable online but it seemed like a very
reasonable way to explain Bode's law from first principles and the same
locked resonance patterns seen in other planetary moons. This is the
closest I've been able to dig up. Ovenden's conjecture gets and
honourable mention in A.E. Roy's 1970's book "Orbital Motion".
 
This comes closest:
https://academic.oup.com/mnras/article/115/3/296/2603818
 

Michael Ovenden was my celestial mechanics and galactic dynamics prof at
UBC. A great guy, whose hobby was teaching New Age workshops at Cold
Mountain Institute. (An odd name for a small barge floating in the harbor,
but I digress.)

Died pretty young, unfortunately.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics