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Astronomers may have detected a stellar-mass floating black hole 5000 ly from Earth.


"Hubble Space Telescope image of a distant star that was brightened and distorted by an invisible but very compact and heavy object. Between it and Earth. The compact object — estimated by UC Berkeley astronomers to be between 1.6 and 4.4 times the mass of our sun — could be a free-floating black hole, one of perhaps 200 million in the Milky Way galaxy. Credit: Image courtesy of STScI/NASA/ESA" (Scitech daily/Stellar “Ghost” Discovered: Astronomers May Have Detected a “Dark” Free-Floating Black Hole)

The new observations that there is possible a free-floating black hole about 5000 light-years from Earth. That candidate has been found by using gravitational microlensing. Gravitational microlensing means that the system detects the curves of the photons' trajectories. And that thing should uncover strong gravitational fields. If the mass of an object is high enough and it cannot be seen, that thing uncovers the black hole.

 A black hole is very hard to detect. If there are no interplanetary nebulas or there are no other stars around the black hole. There is no material around that thing. The material that falls in black holes is sending X-or gamma-ray radiation. 

If that material does not exist detection of a black hole happens by using gravitational microlensing. So, there are some theories that the mysterious Planet 9 is a grapefruit-size black hole. But there is no single observation of than mysterious gravitational effect on the trajectory of planet Neptune. 


The supermassive black holes can deny the birth of stars in some galaxies.


Supermassive black holes are also forming stars. The black hole forms a transition disk around its equator. That material disk forms whirls behind it. The material disk around the supermassive black hole is the thing that forms stars planets in galaxies. Or actually, the turbulence in the material disk forms the stars. 

And those whirls are forming stars and solar systems inside them. But the distance to the supermassive black hole in the nucleus of the galaxies must be high enough. Or its radiation denies the form of the stars. The high-energy radiation that comes from the material that falls in a black hole would go straight across that material disk. 

That radiation destroys those whirls and denies the forming of stars. Also if the plasma's temperature in the galaxy is too high the distance of ions will turn too high. And the speed of ions will be too high that they cannot form stars and planets. The ions must be stable enough that ions can connect to structures like stars. If the temperature of the galaxy is too high that denies forming of stars. 



https://scitechdaily.com/stellar-ghost-discovered-astronomers-may-have-detected-a-dark-free-floating-black-hole/


https://www.universetoday.com/156261/hubble-pins-down-the-mass-of-a-potential-free-floating-black-hole-thats-5000-light-years-away/#more-156261


https://www.universetoday.com/156102/do-supermassive-black-holes-prematurely-end-star-formation-in-some-galaxies/#more-156102


https://miraclesofthequantumworld.blogspot.com/

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