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Thread: Plasma in the accretion disc

  1. #31
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    Quote Originally Posted by Shaula View Post
    Large streamers of gas being stripped off nearby gas clouds and pulled towards the accretion disk are, however, relevant.
    Yes sure.
    Thanks

  2. #32
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    Can we please get a short statement what this (endless) list of questions is leading to?
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  3. #33
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    Quote Originally Posted by Dave Lee View Post
    Plasma To molecular cloud in the Milky way:

    http://www.dailygalaxy.com/my_weblog...that-glow.html

    "The two beams, or jets, were revealed by NASA's Fermi space telescope. They extend from the galactic center to a distance of 27,000 light-years above and below the galactic plane."

    "The jets were produced when plasma squirted out from the galactic center, following a corkscrew-like magnetic field that kept it tightly focused. The gamma-ray bubbles likely were created by a "wind" of hot matter blowing outward from the black hole's accretion disk. As a result, they are much broader than the narrow jets."

    "Finkbeiner estimates that a molecular cloud weighing about 10,000 times as much as the Sun would be required."
    "Shoving 10,000 suns into the black hole at once would do the trick. Black holes are messy eaters, so some of that material would spew out and power the jets,"


    It is stated: "The jets were produced when plasma squirted out from the galactic center", but in reality they see: "a "wind" of hot matter blowing outward from the black hole's accretion disk." However, they also claim that this hot matter had set a molecular cloud .

    Why the plasma which had been squirted out had been first converted into "Hot matter" blowing out and latter on set molecular cloud?
    How could it be that a plasma from the accretion disc can set molecular cloud without fusion activity?

    If I remember correctly, the total mass in the accretion disc is estimated as less than one sun mass.
    So, how could it set a steady stream of jet with estimated 10,000 total Sun mass?
    It is stated: "Shoving 10,000 suns into the black hole at once would do the trick", but how can we fit 10,000 sun mass in the accretion disc at once?
    Do we see any accretion disc with estimated mass of 10,000 sun mass "at once"?
    If I understand it correctly, in all of our observations we only see a stream of hot mass blowing away from the accretion disc.
    Did we find even one evidence for any sort of external mass which is moving in the accretion disc?
    How the accretion disc can blow out a steady stream of jet without getting in new mass constantly?
    What is the source for this constant mass in the accretion disc?
    These 10 000 solar masses were a molecular cloud till they fell in.
    As they fell in, the gravity of black hole accelerated them, heated them and ionized them into plasma. It also formed into an accretion disc.
    Most of the infalling matter was pushed on into the black hole. Because of the heat, pressure and rotation, some of the infalling matter was pushed out instead of in.
    The matter that was pushed out can still be seen. Since most of the plasma was either pushed in or out, with little more gas falling in, there is now less than one solar mass of gas left in the disc.

  4. #34
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    Quote Originally Posted by tusenfem View Post

    Can we please get a short statement what this (endless) list of questions is leading to?
    Get better understanding on plasma activity at the accretion disc of spiral galaxy.
    I do believe that this activity has significant effect on our Universe.
    Thanks for the great support.

  5. #35
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    Quote Originally Posted by Dave Lee View Post
    Get better understanding on plasma activity at the accretion disc of spiral galaxy.
    I do believe that this activity has significant effect on our Universe.
    Thanks for the great support.
    Can you tell us, in appropriate technical detail, what effect you think it has on the universe?

  6. #36
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    Quote Originally Posted by Hornblower View Post
    Can you tell us, in appropriate technical detail, what effect you think it has on the universe?
    No, not if it's ATM.
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  7. #37
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    What is the name of a disc which is blowing out its mass?
    The opposite name for accretion.
    Is it out- retion disc?

  8. #38
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    Quote Originally Posted by Dave Lee View Post
    What is the name of a disc which is blowing out its mass?
    The opposite name for accretion.
    Is it out- retion disc?
    The vaguely unpleasant sounding Excretion disk according to Wikipedia
    https://en.wikipedia.org/wiki/Accret...Excretion_disk

  9. #39
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    Thanks

    Is there a name for a disc which is simultaneously function as Excretion & Accretion disk?

  10. #40
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    Quote Originally Posted by Dave Lee View Post
    Is there a name for a disc which is simultaneously function as Excretion & Accretion disk?
    Not that I am aware of. Not sure it is needed as, for example, accretion disks expel matter as well as accrete it.

  11. #41
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    Quote Originally Posted by Shaula View Post
    Not that I am aware of. Not sure it is needed as, for example, accretion disks expel matter as well as accrete it.
    It might help to call a disc with a name which represents its functionality.
    For example:
    Accretion disc around a star:
    https://en.wikipedia.org/wiki/Accretion_disk
    "An accretion disk is a structure (often a circumstellar disk) formed by diffused material in orbital motion around a massive central body. The central body is typically a star."

    In the following image we see clearly that mass is drifting from outside to the center.
    https://en.wikipedia.org/wiki/Accret...etion_disk.jpg

    However, if we focus on the mass in this accretion disc:
    Do we see any sort of plasma? Do we see particles of broken atoms? Do we verify high temperature of 1 * 10 ^ 9 degrees?
    This is very critical.
    Why don't we distinguish between accretion discs with or without high temp plasma?

    In the same token, Why don't we distinguish between disc which is blowing outwards some of its mass to the one which doesn't?

    How could it be that our scientists don't clearly distinguish between a disc around a star to a disc around a SMBH in the core of spiral galaxy?
    Last edited by Dave Lee; 2018-Jul-14 at 01:15 PM.

  12. #42
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    Quote Originally Posted by Dave Lee View Post
    It might help to call a disc with a name which represents its functionality.
    For example:
    Accretion disc around a star:
    https://en.wikipedia.org/wiki/Accretion_disk
    "An accretion disk is a structure (often a circumstellar disk) formed by diffused material in orbital motion around a massive central body. The central body is typically a star."

    In the following image we see clearly that mass is drifting from outside to the center.
    https://en.wikipedia.org/wiki/Accret...etion_disk.jpg

    However, if we focus on the mass in this accretion disc:
    Do we see any sort of plasma? Do we see particles of broken atoms? Do we verify high temperature of 1 * 10 ^ 9 degrees?
    This is very critical.
    Why don't we distinguish between accretion discs with or without high temp plasma?

    In the same token, Why don't we distinguish between disc which is blowing outwards some of its mass to the one which doesn't?

    How could it be that our scientists don't clearly distinguish between a disc around a star to a disc around a SMBH in the core of spiral galaxy?

    I think we have reached a final point here. This is just repetition of questions that you have already asked, and I think that Shaula and hornblower et al. have done a very good job explaining everything.
    Thread closed.
    Last edited by ToSeek; 2018-Jul-15 at 01:18 AM. Reason: typo
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