The Magnetic Field of the Milky Way (2000)
lweb.cfa.harvard.edu
lweb.cfa.harvard.edu
Since them, much more detailed magnetic fields maps have been made of the Milk Way: https://www.forbes.com/sites/startswithabang/2019/09/23/this...
Also for other galaxies: https://www3.mpifr-bonn.mpg.de/staff/rbeck/PSSS18.pdf
Since them, much more detailed magnetic fields maps have been made of the Milk Way: “
I was surprised to see that followed up with link from 2019?
Last I talked to him about it, he said that the results were surprising. I think he said no one really knew yet how to explain the vertical yellow streaks representing hot plasma.
http://www62.homepage.villanova.edu/david.chuss/FIREPLACE_Po...
The act of moving a magnet and thus changing the magnetic field at one point also induces a change in the electric field and vice versa, that's why you'll always hear talking about "electromagnetic" waves (which light, radio waves, etc are an instance of).
To make things even more interesting there is also this phenomenon: the magnetic field is created by moving electric changes, relative to the observer. If an observer moves at the same velocity as the electric charge it will not observe a magnetic field. It turns out that when you apply special relativity to the effects of electrical charges (coulomb 's law) you get a theory of electro-magnetism (Maxwell's equations). Magnetism this "follows" from the behavior of electrical fields and special relativity. That doesn't make magnetism less "real" but it hints at the intimate connection that the two forces have and what we now talk about them as "electromagnetism"
There are effects like quantum entanglement that seemingly bypasses this, but there is no way to extract useful information out of it.
there is no way to extract useful information out of it
Like the Feynman diagram is in any case that a photon is transmitted between two charged objects, whether that photon is “real” or “virtual”.
I know there are physicists who interpret this as there being two distinct things, either particle-like excitations (photons) and more general excitations (not photons). These usually don’t think of Feynman diagrams as representing anything real.
But I also know there are some physicists who consider virtual photons “real”. And in that picture of reality, all EM interaction is “light”.
Answer; at the speed of light.
Could link to a custom, cached search?
Tried playing with the algolia search and the API but it doesn't seem to properly support multi-keyword searches and OR logic.
Easy to build a list of keywords to search titles and first-posts
given that the galaxy is moving, i'd say yes.
The upper limit on its central black hole is ~1500x of Sol and it's widely believed right now to just not have one. By comparison, the Milky Way’s black hole is 4 million Sol masses and our galaxies SMBH is quite tiny by comparison to many galaxies.
[1] https://www.science.org/cms/asset/7c8770b5-a357-40f5-a491-19...