Not one, but 20000 black holes hiding in Milky Way's heart

NGC4565 LRGB a spiral galaxy 30-50 million light years from Earth

According to a study in the journal Nature published on Wednesday, the stellar black holes exist in addition to the already known supermassive black hole, called Sagittarius A, which sits at the center of the Milky Way. And because scientists know what fraction of black holes will bind with low mass stars, after they discovered the 12 they were able to calculate the population of isolated black holes around Sgr A*.

Instead, the researchers looked for slow-burn signals that would also indicate the presence of smaller black holes, in order to spot all of the signals that otherwise can't be observed. The balance of high-energy versus low-energy x-rays emitted by these sources "are consistent with those from low-mass binaries with black hole companions", she notes.

The centre of our galaxy is teeming with black holes, sort of like a Times Square for odd super gravity objects, astronomers discovered.

In the past, failed efforts to identify evidence of such a cusp have concentrated on searching for the bright burst of X-ray glow that periodically occurs in black hole binaries.

As gravity takes over and eventually wins, it forms a singularity, a single point in space where gravity is so strong that no object - not even light - can escape its grasp once it crosses its boundary.

Simulations and cosmological models also suggest that the central area of the Milky Way has several other black holes.

Astronomers poring over old x-ray observations have found signs of a dozen black holes in the inner circle of the Milky Way.

Black holes are one of the most fascinating objects in our universe.

For the first time, an global team of astronomers led by astrophysicist Charles Hailey from Columbia University in New York, US, has found have found a dozen of these stellar mass black holes within 3.3 light-years (about 30 trillion kilometres) of Sagittarius A*. "That's why people like to study it".

At Mar-a-Lago, Trump hears from immigration hardliners
This morning, Trump also casually demanded an end to the filibuster, so the Senate could pass border legislation he wanted. Online, many criticised the president for remarks, but said they were not surprised, given his history of tweets on DACA .

MI vs. Villanova Live Stream
Deadly 3-point shooting and an abundance of offensive options make this team a death machine for any coach to have to handle. Forward Eric Paschall converted on almost all of his shots beyond the arc, pouring in four 3-pointers on five attempts.

Sunday Best! Jesus Christ Superstar, Starring John Legend, Wins Easter Viewers
Teigen also noted the show's fashion, tweeting "I have a feeling whoever has the deepest V will be crucified" and "THE V'S". The narrative is loosely based on the canonical gospels' account of the last week of Jesus' life.

The galactic centre is already known to teem with stars, supernovae, pulsars, gas and dust, and the very big black hole called Sagittarius A*, whose mass is equivalent to four million suns.

Either way, our galaxy's supermassive black hole should be surrounded by hundreds of stellar-mass black holes - at least.

This artist's rendering shows Sagittarius A* surrounded by a cloud of dust and gas, within which are 12 small black holes.

Although scientists cannot directly observe black holes with the technology we now posses, they can detect black holes by studying the matter around them.

Harvard astronomer Avi Loeb, who wasn't part of the study, praised the finding as exciting but confirming what scientists had long expected. In the case of the Milky Way, we have the gargantuan Sagittarius A*, whose mass is equivalent to four million suns.

From the data gathered by Chandra, the authors of the study believe that there may be hundreds of black holes paired with other stars in unique binary systems which stronger X-rays. Those x-rays are what astronomers observe.

Knowing about these dozen bright black hole binaries, the researchers wondered how many fainter ones they might be missing. Using that ratio, Hailey figures that even though they only spotted a dozen there must be 300 to 500 binary black hole systems.

Black holes tend to come in two sizes. But estimated that there could be up to 20,000 of them extending further out from Sagittarius A* based on calculations. The central region of our galaxy is a crowded place, filled with lots of other X-ray sources that aren't black holes.

Hailey said it is "sort of like a little farm where you have all the right conditions to produce and hold on to a large number of black holes".

Related news:

Hot News

isis-killer-beheading-video-story-top Nicole Scherzinger breaks silence after being dropped from The X Factor
Apr 04, 2018 - 08:11
However, the show source told The Sun it may not be that easy to axe Louis or Sharon as they both are contracted for the series. However, he said it would be a real shame if the show lost Nicole, calling her "brilliant" and hard-working.

isis-killer-beheading-video-story-top Officials seek clues in SUV cliff crash that likely killed 8
Apr 04, 2018 - 07:49
Bret Barnumin during a 2014 protest in Portland, Oregon against police brutality went viral, according to The New York Times . DeKalb said he called Child Protective Services on March 23, and they arrived just after Jennifer Hart came home from work.

isis-killer-beheading-video-story-top US Considers New Sanctions Against North Korea
Apr 04, 2018 - 07:27
Washington has vowed to keep pressure on North Korea over its nuclear weapons program despite recent moves toward dialogue. The designations came at the request of the United States, the report quoted a council diplomat as saying.

isis-killer-beheading-video-story-top OnePlus 6 Official Teaser Out; Smartphone Expected to be Launched in April
Apr 04, 2018 - 07:01
The alphanumeric word "6et" obviously means the upcoming phone will indeed be called as OnePlus 6 , as previously rumored. We've also got a picture of a OnePlus 6's case which reveals its back design, but let's first take a look at the pricing.

isis-killer-beheading-video-story-top More than 1000 companies yet to submit figures on gender pay gap
Apr 04, 2018 - 06:56
Last week, data published by public sector organisations revealed nearly nine in ten bodies pay male staff more than women. While there are more women than men in the top quartile, this represents 19% of all female staff.

isis-killer-beheading-video-story-top Mississippi State and Notre Dame set for women's title game
Apr 03, 2018 - 03:09
Young, who had 32 points in the semifinal win over UConn, struggled all night and finished with six. "One More", Schaefer said. She's now done the same at Notre Dame , with not one, but two game-winning buzzer beaters in the NCAA Women's Final Four.

isis-killer-beheading-video-story-top Douma: Rebel Syrian fighters evacuated
Apr 03, 2018 - 03:02
Late on Saturday, negotiators reached a deal to evacuate wounded Jaish al Islam civilians and fighters to Idlib in the northwest. Rudskoi said over 143,000 people, including 13,793 rebels and 23,544 members of their families have left eastern Ghouta.

isis-killer-beheading-video-story-top Putin meet was on the cards?
Apr 03, 2018 - 01:58
Washington has, however, said Russian Federation is free to apply to accredit more diplomats to replace those expelled. As we see it, it is something important and necessary for both parties and for whole global community.

isis-killer-beheading-video-story-top Today is World Autism Awareness Day
Apr 03, 2018 - 01:55
April 2 is World Autism Awareness Day , and people are wearing the color blue to raise awareness for the developmental disorder. The exhibition would be inaugurated by the cultural affairs minister Asaduzzaman Noor at 5:30 pm on Wednesday.

isis-killer-beheading-video-story-top Up to 4 inches of snow expected
Apr 03, 2018 - 01:45
Higher snowfall could be seen heading south along Route 15 in Union County and more toward Harrisburg, he said. Starting as rain, the precipitation turned to snow in the predawn hours before letting up late in the morning.

isis-killer-beheading-video-story-top Gaza border death toll rises to 18
Apr 03, 2018 - 01:42
Israel accuses Hamas, with whom it has fought three wars since 2008, of using the protest as cover to carry out violence. Israeli forces fired live ammunition and rubber-coated steel pellets, while drones dropped tear gas from above.

isis-killer-beheading-video-story-top Teachers in Oklahoma and Kentucky stage protests
Apr 03, 2018 - 01:38
Districts announced plans to keep campuses shut down into Tuesday with teacher demonstrations expected to last a second day. Before state legislators passed a pay raise last Thursday, Oklahoma teachers had not received a state raise in decade.

Kistler Tiffany Companies LLC Boosts Position in Apple (NASDAQ:AAPL)
Apr 03, 2018 - 01:35
The average 1-year target price among brokerages that have updated their coverage on the stock in the last year is $203.69. Proshare Advisors Limited Liability Company holds 0% or 18,830 shares in its portfolio. (NYSE:SAVE).

isis-killer-beheading-video-story-top Five Shabaab fighters killed in Somalia strike — United States military
Apr 03, 2018 - 01:23
Fierce gun battle lasts for several hours after attack on military camp in Bulo Marer, 160km southwest of Mogadishu . This claim was dismissed by al-Shabab's military operations spokesperson Abdiaziz Abu Mus'ab.

isis-killer-beheading-video-story-top US, South Korea Kick Off Annual Joint Military Drills
Apr 02, 2018 - 04:05
President Donald Trump for the first-ever summit between the two countries, though the date and venue have yet to be determined. North Korean leader Kim Jong Un has long viewed the annual military exercises as a provocation.