Can a spiral galaxy be formed without a black hole at it's center?

Question

I recently discussed this concept with a professor of astronomy and I was wondering if anyone knew off hand if the only true cause of galactic spiraling would be black holes, or if some other phenomenon such as a black dwarf star could cause a similar gravitational effect?

Answer 1

no

Answer 2

recently we've found every galaxy we see has a super-massive black hole near it's center... nothing ever just forms in space... it's either created from destroyed bodies (stars or planets for example) or the interstellar gas/dust.... planets have been shown to be formed when dust swirls around a star due to it's gravity and gradually collects over time....

since i've found out black holes lie at the heart of every galaxy, i have believed they are the reason the dust even begins to move to begin with.... if the dust wasn't moving how could they ever collide and form a bigger body? they couldn't..... it would stay dust forever....

a star, even a black hole couldn't spin a whole galaxy's worth of dust.... but a supermassive black hole could.... if they don't play a part in the formation of a galaxy, why are they located in the dead center of the 200 billion galaxies we can see in our observable universe?

"well my anwser is no im only thinking our sun in about 3 more billion years will die and turn into a black hole or (man i forgot the other one)"

it's 5 billion and our sun is much too small to go supernova, it will turn into a red giant, massively building it's diamter.

Answer 3

The spiraling is attributed to gravitation forces and the way the galaxy was formed.  That's why not all galaxies have swirls.  Black holes are usually present at the center of the galaxy as a consequence of the nature of the centers of galaxies.

Answer 4

If a black hole could exist,likely one would reside at the center of all galaxies.

  I believe that galaxies are the end stage in the evolution of the universe.

  They are not gravity driven,

  Gravity initiates the beginning of a galaxy then another force carries it to it's end.

  Galaxies are made up of satellite systems which are gravity driven but as matter merges near the galactic center gravity diminishes and another force,likely the action of neutron density matter causes the galaxy to collapse at an accelerating pace and produces a low density space which is the force that maintains the integrity of the outer arms without the intervention of dark matter.

Answer 5

well my anwser is no im only thinking our sun in about 3 more billion years will die and turn into a black hole or (man i forgot the other one)

Answer 6

no because nothing strong enough to pull the galaxy together except a big black hole