Thread B: For persons who know Newton's equations of motion: How does angular momentum balance gravity as galaxies form? Why do we not see at least a few galaxies collapse into their centers?
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Angular Momentum in Galaxies: Thread B
- Thread starter Erring Flatley
- Start date
Hum,
There is an `imbalance` when we do actually look at the galaxies `now`...(luckily someone thought up of `dark matter/phantom matter` to balance it up.
It may be wrong; there are other alternatives such as the varying strength of gravity on large scales (which may be testable with the next generation laser measuring systems), but it’s a puzzle just now…
As for when we <b>do</b> see a few galaxies collapse into their centres early in the formation of the universe- we call them <b>quasars</b>.
There is an `imbalance` when we do actually look at the galaxies `now`...(luckily someone thought up of `dark matter/phantom matter` to balance it up.
It may be wrong; there are other alternatives such as the varying strength of gravity on large scales (which may be testable with the next generation laser measuring systems), but it’s a puzzle just now…
As for when we <b>do</b> see a few galaxies collapse into their centres early in the formation of the universe- we call them <b>quasars</b>.
Itseemstome
Registered Senior Member
Dark Matter
Dark Matter? Is that the scientific version of Black Magic? People used to be burned at the stake for ideas like that.
Dark Matter? Is that the scientific version of Black Magic? People used to be burned at the stake for ideas like that.
blobrana said:As for when we <b>do</b> see a few galaxies collapse into their centres early in the formation of the universe- we call them <b>quasars</b>.
The nature of quasars (quasistellar radio sources) is being debated.
Hum,
Yeah, it`s not a 100% cert but "<i>the dominant view is that a supermassive black hole is consuming gas clouds and creating an acceleration disk that moves the gas near luminous speeds. The friction caused by this disk would create light and other radiation.
Additionally, the environment that most all quasars appear to be in are at the center of luminous galaxies. What this means is that the quasar could indeed be consuming gas clouds since galaxies are where these gas clouds could be found. Also, when a quasar galaxy and another galaxy collide, the unfortunate other galaxy is left with missing parts or heavy distortion suggesting that the quasar has captured gas clouds from the other galaxy as well</i>"
<B>Extract:</b>
<a href="http://216.239.59.104/search?q=cache:1CT8ElTXlogJ:www.rdrop.com/users/green/school/quasars.htm+quasars&hl=en">here</a>
Yeah, it`s not a 100% cert but "<i>the dominant view is that a supermassive black hole is consuming gas clouds and creating an acceleration disk that moves the gas near luminous speeds. The friction caused by this disk would create light and other radiation.
Additionally, the environment that most all quasars appear to be in are at the center of luminous galaxies. What this means is that the quasar could indeed be consuming gas clouds since galaxies are where these gas clouds could be found. Also, when a quasar galaxy and another galaxy collide, the unfortunate other galaxy is left with missing parts or heavy distortion suggesting that the quasar has captured gas clouds from the other galaxy as well</i>"
<B>Extract:</b>
<a href="http://216.239.59.104/search?q=cache:1CT8ElTXlogJ:www.rdrop.com/users/green/school/quasars.htm+quasars&hl=en">here</a>
blobrana said:Hum,
Yeah, it`s not a 100% cert but "<i>the dominant view is that a supermassive black hole is consuming gas clouds and creating an acceleration disk that moves the gas near luminous speeds. The friction caused by this disk would create light and other radiation.
Additionally, the environment that most all quasars appear to be in are at the center of luminous galaxies. What this means is that the quasar could indeed be consuming gas clouds since galaxies are where these gas clouds could be found. Also, when a quasar galaxy and another galaxy collide, the unfortunate other galaxy is left with missing parts or heavy distortion suggesting that the quasar has captured gas clouds from the other galaxy as well</i>"
<B>Extract:</b>
<a href="http://216.239.59.104/search?q=cache:1CT8ElTXlogJ:www.rdrop.com/users/green/school/quasars.htm+quasars&hl=en">here</a>
Quasars (quasistellar radio sources) emit very strongly in the radio spectrum. These radio waves can only be created by moving electrons, either as an electrical current or as moving free electrons as in an electron beam. These radio waves are described as being circularly polarized. So, the electron flow must be moving in a circular direction not back and forth (as in a radio tower). The intensity of the radio wave output varies from year to year indicating the stucture producing the waves is in a resonate state (maybe only a wobble). And since the source is so extremely strong it would imply the radio beam produced is directional and pointed toward us. Meaning there are other quasars pointed elsewhere, that we do not see. It is very very unlikely such a structure is produced by the collapse of a galaxy. It is more likely that they are produced by an exploding star as with the crab nebula.