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Maths & Physics help wanted ref building a galaxy simulator
I need to sum the total gravity in the milky way....if my understanding is correct i also need to sum all the energy as well , not just the massyes/no/maybe ?
Second question Ball park figure for the energy contribution of gravity in the milky way ? ....rough % terms Just so i have some idea of how much gravity ill be ignoring.Ill be keeping a rough tally of all effects/phenomena/force contributors that ill be ignoring. Hence my pedantry / double checking.
Im a bit rusty maths wise hence the ask....im guessing using E=MC'2be cool if you could provide me with 1 example
AFAIK all the energy in all its forms contributes to gravity....
Im slowly wading through a long list of factors. What i need to code up, best method to code it up etc. I have a lot on the brain. Just double checking my facts as i go along. I appreciate your input.
Very small effects can still have noticeable consequences especially when those effects are felt continuously throughout the system and the experiment is left to run for billions of years....this long term contribution is one area i wish to consider.
I also appreciate that the value of rest mass of the milky way has a much larger upper and lower bound of uncertainty...and that the energy contribution can probably be ignored.
the distribution of some of the gravitational force caused by energy, neutrinos and dust may well have an impact.
Gravity travels at the speed of light ?yes/no/maybe/ possible issues with calculation
If so im curious as to how this effects the orbits, especially at galactic scales....any insight on this most welcome
really ? Is there an article or video which explains why this is so. Explains how i can ignore the fact that gravity travels at the speed of light....which is what i think you are saying.
To clarify I was thinking of ray casting with gravitons, (as one method of calculating gravity ) and my instinct tells me that the speed of these virtual particles would be influential on outcomes.
I also had a quick read of this...its a bit old so im not so sure of its validity given my current level of comprehensionhttp://home.comcast.net/~peter.m.brown/ref/mass_articles/Olson_Guarino_1985.pdf
Ps, i am taking it all on board, your efforts not wasted
It i my intention to understand this graph, and perhaps with due diligence alter its shape to fit reality a tad betterhttp://astro.unl.edu/classaction/animations/milkyway/milkywayrotationalvelocity.html
help wanted ref building a galaxy simulator
There are several galaxy simulation projects already under weigh. I'm sure some of them would welcome you into their group or share expertise with you. Some of them are investigating electro-magnetic forces between galaxies due to a small net electric charge rotating with the galaxies. There are several galaxy simulators available to download, free or not. If you can get the source code, you can tweak the models to match your understanding. Not standard physics, but I suspect you might find a correlation between galaxy spin and motion of the galaxy relative to the CMB. This would be attributable to a speed-of-gravity which is finite but much faster than light.
One of the problems would be to find as much information as possible about every star. Are all 300 Billion stars in the Milky Way classified by mass, velocity, direction, etc? Are they all even distinguishable as discrete independent stars?