Re: High-Mileage Black Holes


Sam Wormley wrote:
ma1ibu wrote:
You are saying that part of what is trying to go
in is deflected away- back out- as relatavistic
jets of matter.
So you are saying that MOST of what goes into
the BH stays in.
Hmm. Must be an unlimited supply, hey?

What I'm saying is everything CYCLES through the
BH. It constantly RENEWS the galaxy. Your
idea is untenable. Mine is not.
Your idea makes no long-term sense, because
you insist on talking beginnings and endings
with nothing to put before or after.

My teeth are gold, my hat is old,
now my story is all told.
(-:
John
d)

Your idea is untenable, John. Gravity wins except for
what gets shot out in the jets and radiated away as
part of the accretion disk dynamics.

I attended a talk last friday about active galactic nuclei, a wide
banner that basically says "stuff we can see at galactic cores".

Basically, what is known is that some kind of process is spitting out
massive amounts of energy with a magnetic field strength comparable to
a neutron star.

The field strength bit surprised me because I expected it to be much
higher. I had to ask in vague terms because we don't know:

a) What the jets are actually made of.
b) How massive the jets are
c) The exact process that creates the jets.
d) How much, if at all, black hole charge and spin influences the
dynamics in the core. [That was a question I asked specifically]
e) I forget.

All we can do is make handwaving guesses about the exact process. At
least we can get a decent idea of the black hole's mass and the
velocity of the outgoing jets.

I think I summarized the talk when I mumbled "we don't know shit". I
think it was good I didn't say it too loud.

I think the thing that surprised me the most WAS the field strength
bit. A black hole from an AGN that was centered on Sol would be a
sizable part of the solar system in diameter. Surrounded by that is god
knows how many solar masses of plasma emitting anything from hard gamma
to radio while spinning about the black hole at velocities measured in
thousands of kilometers per second. Yet somehow the magnetic field of
that clusterfuck is simply comparable to a regular old neutron star.

Then again, mabey the power of the field is amplified signifigantly
because of the presense of a multi-million solar mass black hole within
a few light hours. I have no idea what GR + electromagnetism is like.


My hat is chocolate so I can eat it now and then if
I have to.

.

Relevant Pages

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    ... RADIO TELESCOPES CAPTURE BEST-EVER SNAPSHOT OF BLACK HOLE JETS ...
    (sci.space.news)
  • Re: Black holes and red shift
    ... he changes his mind more often than his underpants..... ... The plasma in these jets is propelled away from the poles ... I think the parallel with black hole jets should be obvious.) ...
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  • Possible Jet Blown Shells Near Microquasar Cygnus X-1
    ... In the case of Cygnus X-1, perhaps little of that matter actually makes it in. ... Infalling gas may first collide not only with itself but with an accretion disk of swirling material surrounding the black hole. ... The result may be a microquasar that glows across the electromagnetic spectrum and produces powerful jets that expel much of the infalling matter back into the cosmos at near light speed before it can even approach the black hole's event horizon. ... Confirmation that black hole jets may create expanding shells has come recently from the discovery of shells surrounding Cygnus X-1. ...
    (sci.physics)
  • Re: High-Mileage Black Holes
    ... jets of matter. ... What I'm saying is everything CYCLES through the ... The field strength bit surprised me because I expected it to be much ... How much, if at all, black hole charge and spin influences the ...
    (sci.physics)
  • Re: High-Mileage Black Holes
    ... jets of matter. ... What I'm saying is everything CYCLES through the ... My teeth are gold, my hat is old, ...
    (sci.physics)