Just think... in the presence of a constant magnetic field, this could be the most powerful particle collider in the visible universe
Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
21–30 of 84 posts
Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#22I’ve seen stellar engines [1] show up in fiction.
Has anyone done a galactic engine?
Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#23Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#24What happens to the plasma that the black hole spits out? Do they have any ideas?
I studied these objects for my first research paper in grad school. (You can see a few images of some of the objects I found in Figure 3 of my paper [1]) In essence the jet blows a hot bubble into the gas that comprises the intracluster medium of the galaxy cluster. Over time synchrotron radiation causes the bubble to cool down and eventually (maybe on the order of a few 100 million to a billion years if I recall right) the bubble comes into thermal equilibrium with the surrounding gas.
Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#25I have a question about black holes, HN.
Let’s say you have a black hole. You fire a laser beam straight into it. Just by symmetry, shouldn’t it blueshift on the way in, gain some preposterous amount of energy — enough that it can escape?
Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#26Earlier quoted context omitted.
Not my field, but could the Big Bang have been a massive black hole that "spat" out jets of plasma that formed into new stars and galaxies? I call this the black hole big burp theory.
This seems incompatible with inflation
Isn't universe inflation already on shaky ground though? https://www.scientificamerican.com/article/cosmic-inflation-...
Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#27The jets are 23 million light years in length! That's 140 milky way galaxies laid out -- these are sizes I can't even begin to comprehend
Pretty crazy!
Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#28Earlier quoted context omitted.
Not my field, but could the Big Bang have been a massive black hole that "spat" out jets of plasma that formed into new stars and galaxies? I call this the black hole big burp theory.
This is very close to an idea known as "Black hole cosmology" -- basically the idea being that the visible universe is inside a black hole, leading to a sort of "nested multiverse". https://en.wikipedia.org/wiki/Black-hole_cosmology A related theory, rather than being inside a black hole, is that the other side of a black hole is a "white hole". As matter collapses into a black hole, it is emitted from the white hole…
Wow, thanks for the resources! I actually never heard of a living universe 'inside' a black hole.
Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#29I have a question about black holes, HN. Let’s say you have a black hole. You fire a laser beam straight into it. Just by symmetry, shouldn’t it blueshift on the way in, gain some preposterous amount of energy — enough that it can escape?
Light travels in a straight line - black holes don't "pull" light in, they change what a straight line looks like in the space around it.
The event horizon is the distance where all straight lines lead to the black hole.
Re: Biggest ever seen black hole jets; blasting plasma well beyond their own galaxy
#30The jets are 23 million light years in length! That's 140 milky way galaxies laid out -- these are sizes I can't even begin to comprehend
Imagine a one meter long jet.
Congratulations, you've begun to comprehend it and now are at 1/(2.176 × 1023) of the total length.