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I didn't find it.
So who can explain the functionality of the Bar in the spiral galaxy?
Quote from: Dave Lev on 22/06/2022 19:22:45So who can explain the functionality of the Bar in the spiral galaxy?Why do you think it has a "function"?
As an example - Every part in our body has a function.
It's like asking what is the purpose of a rock on the beach.It's not there "for" anything, it's just there.
They affect the motions of stars, dust and gas. It is believed that bars act a bit like a funnel, pulling matter into the bulge from the disk
Quote from: Dave Lev on 22/06/2022 21:05:29They affect the motions of stars, dust and gas. It is believed that bars act a bit like a funnel, pulling matter into the bulge from the diskYou might find this interesting:. https://www.universetoday.com/151820/the-milky-ways-central-bar-spin-rate-is-slowing-down-thanks-to-dark-matter/#more-151820
https://scitechdaily.com/galactic-bar-paradox-a-mysterious-and-long-standing-cosmic-conundrum-resolved-in-cosmic-dance/It is stated:"The bar pulsations result from its regular encounters with the Galactic spiral arms, in what can be described as a “cosmic dance”. As the bar and spiral arm approach each other, their mutual attraction due to gravity makes the bar slow down and the spiral speed up.Once connected, the two structures move as one and the bar appears much longer and slower than it actually is. As the dancers split apart, the bar speeds up while the spiral slows back down."
How can you compare a rock to the Bar.
So, based on this article, the Bar has an important function:
A function means that there is intent.The bar has an effect, but not a function.
You need to realise that galaxies do not think.
Our mission is to verify how they really work.
If you prefer to call this activity as effect instead of function - then this is perfectly OK.
The best you can do is to try to understand what the scientist have discovered.
You might find this interesting:. https://www.universetoday.com/151820/the-milky-ways-central-bar-spin-rate-is-slowing-down-thanks-to-dark-matter/#more-151820
"So the Hercules stream follows the motion of the central bar, and the stars of the Hercules stream have migrated outwards to their present position over the past few billion years".In other words - our scientists OBSERVE stream of stars (that is called - Hercules stream) as it migrates outwards from the central bar.Therefore, it is an indication that stars from the central Bar migrate outwards and not inwards, exactly as I have estimated.
https://www.schoolsobservatory.org/learn/astro/gals/class/barredspiral"Bars are found in up to 65% of spiral galaxies. They affect the motions of stars, dust and gas. It is believed that bars act a bit like a funnel, pulling matter into the bulge from the disk. This leads to stars forming in bursts within the centre.".
The following message is very interesting:https://scitechdaily.com/galactic-bar-paradox-a-mysterious-and-long-standing-cosmic-conundrum-resolved-in-cosmic-dance/"The bar in the center and the spiral arms are thought to rotate at different speeds. If they are disconnected the bar shows its true and smaller structure (left). Every time they meet, the bar appears longer"Let's try to read it carefully:It is stated: "Every time they meet, the bar appears longer"So, Every time the Bar meets with the spiral arm, it appears longer"The only way for the Bar to appear longer is when the stars in the bar migrate outwards.Therefore, the strong gravity force of the spiral arm force the bar to migrate stars outwards and therefore it appears longer.However, it is also stated: "If they are disconnected the bar shows its true and smaller structure (left)"Hence, as the bar is disconnected from the spiral arm it is losing a section/segment of its size/arm and therefore it looks smaller.In other words - as the Bar is in the direction of the spiral arm, a steam of stars are moving outwards from the bar (It looks longer) and it is connected to the spiral arm as they both are in a temporary one structure.Hence, when the Bar arm is disconnected from the spiral arm, it loses some section of its size/arm and it appears smaller.On the other hand, the spiral arm gets new section of stars and it appears longer at the disconnecting moment.That proves that the bar function as a funnel that deliver stars from the Bulge into the spiral arm.This is the most important observation of the spiral galaxy activity.
Therefore, my opinion is : The best, and i will finish briefly here, is to consider the "graviton" (or whatever it is) like some fluid that is occupying the area around the star.The intensity of the fluid production is extremly strong, so the filling around the star is "like if" the "fluid balloon" extend around speed of light, but soon you go further, and because of the constant (proportional to mass) production of this fluid the "balloon" growing rate decrease.
https://scitechdaily.com/galactic-bar-paradox-a-mysterious-and-long-standing-cosmic-conundrum-resolved-in-cosmic-dance/"As the bar and spiral arm approach each other, their mutual attraction due to gravity makes the bar slow down and the spiral speed up."
https://scitechdaily.com/galactic-bar-paradox-a-mysterious-and-long-standing-cosmic-conundrum-resolved-in-cosmic-dance/"Once connected, the two structures move as one and the bar appears much longer and slower than it actually is."
So, what do you expect me to do?
It's in the literature.Go and look it up.
if you think that the Bar works differently,