Friday, 17 November, 2017

Supermassive black hole discovered near heart of the Milky Way

Keio University CO–0.40–0.22 CO–0.40–0.22* black hole black holes intermediate-mass black hole midsized black hole supermassive black hole Milky Way galaxy galaxies space science Long-rumored midsized black hole may be hiding out in the Milky Way
Terence Owen | 05 September, 2017, 18:55

Astronomers have found the best evidence yet for the existence of a midsized black hole-long-rumored objects bigger than the small black holes formed from a single star, yet far smaller than the the giant ones lurking at the centers of galaxies-and it's hiding out in our own Milky Way.

"It's a very careful paper and they have gorgeous data". The Atacama Large Millimeter/submillimeter Array provided high-quality images of the cloud.

Now the mystery could be solved by the identification of the intermediate-type black hole - something astrophysicists suspected were around but for which there have been only tentative candidates in the past.

Located near the clump of gas was a source of radio waves resembling those of Sagittarius A, the massive black hole at the center of the Milky Way, Science reports.

If subsequent analysis can prove the hypothesis, it could be a huge turning point for understanding how galaxies evolve - a smoking gun that explains how supermassive black holes dominate the sprawling star systems swirling around them.

Using numerical simulations of the hidden object, they interpret it as being an IMBH that is not now accreting matter-the accumulation of particles by gravitationally attracting more matter.

Astronomers have long found evidence for small, star-sized black holes-up to about 10 times the sun's mass-and supermassive ones, containing millions or billions of solar masses, in galactic cores. Its unusual movement signaled towards a huge "compact object" at the centre, which scientists suspect of being a black hole.

Keio University CO–0.40–0.22 CO–0.40–0.22* black hole black holes intermediate-mass black hole midsized black hole supermassive black hole Milky Way galaxy galaxies space science
Supermassive black hole discovered near heart of the Milky Way

But how did it form and how did it get there?

"It is widely accepted that black holes with masses greater than a million solar masses lurk at the centers of massive galaxies", the team wrote.

Oka and Keio believe this IMBH formed through the first option.

A new kind of black hole has been found at the centre of the Milky Way - a find that may help explain the evolution of the phenomena.

The molecular cloud named as the CO-0.40-0.22 was detected by the Nobeyama radio telescope, a 45-meter telescope in Japan's National Astronomical Observatory.

"That growth should happen in part by mergers with other black holes and in part by accretion of material from the part of the galaxy that surrounds the black hole".

Instead, researchers look to possible influences on nearby objects or disruptions in gravitation to detect these occurrences and, based upon observations of the cloud of molecular gas, scientists believe the most likely cause of these particular gravitational disruptions could be the existence of a black hole. But if Oka's team or others are able to find a population of such objects, "we can put our ideas to the test".

The NY Daily News finally has a buyer
Zuckerman's business will still own the land where the plant is located, but Tronc will acquire a 49.9% interest in the property. The Chicago Tribune reported the deal had Tronc paying $1 for the paper plus taking on "operational and pension liabilities".

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