Study Black Holes Have Size Limit: related news

Black Holes May Not Grow Beyond Certain Limit

xyz writes "Do black holes increase in size indefinitely? According to an analysis by astronomers at Yale and the European Southern Observatory, the maximum size a black hole may reach is only few tens of billion of solar masses. The limit was calculated using an analysis of what may happen to the gas surrounding a black hole which has reached few tens of billions of solar masses. It is thought that black holes of such size heat the surrounding gas to a temperature where the radiation pressure begins blowing outer layers into space."

Study: Black Holes Have Size Limit

A U.S. study suggests there is an upper limit to how big the universe's most massive black holes can become.

Even Early Galaxies Had Supermassive Black Holes

We're learning more about black holes and the early universe all the time, with the help of all the amazing ground-based telescopes astronomers now have at their disposal. Astronomers think that many - perhaps all - galaxies in the universe contain massive black holes at their centers. New observations with the Submillimeter Array now suggest that such colossal black holes were common even 12 billion years ago, when the universe was only 1.7 billion years old and galaxies were just beginning to form. The new conclusion comes from the discovery of two distant galaxies, both with black holes at their centers, which are involved in a spectacular collision.

The Violent Variations of Black Holes

What is the environment around a black hole really like? Astronomers are getting a better idea by observing the light coming from the accretion disk surrounding black holes. The light is not constant — it flares, sputters and sparkles – and this flickering provides new and surprising insights into the colossal amount of energy emanating from around black holes. By mapping out how well the variations in visible light match those in X-rays on very short timescales, astronomers have shown that magnetic fields must play a crucial role in the way black holes swallow matter.

An upper mass limit for black holes

There appears to be an upper limit to how big the Universe's most massive black holes can get, according to new research led by a Yale University astrophysicist and published in Monthly Notices of the Royal Astronomical Society.

Black Holes Are The Rhythm At The Heart Of Galaxies

The powerful black holes at the center of massive galaxies and galaxy clusters act as hearts to the systems, pumping energy out at regular intervals to regulate the growth of the black holes themselves, as well as star formation, according to new data from NASA’s Chandra X-Ray Observatory.

Black Holes Are The Heart Of Galaxies

The powerful black holes at the center of massive galaxies and galaxy clusters act as hearts to the systems, pumping energy out at regular intervals to regulate the growth of the black holes themselves, as well as star formation, according to new data from NASA’s Chandra X-Ray Observatory.

New Program Connects Baltimore Students with Arts

black technology, black engineers, black education, black minorities, black engineer of the year awards (BEYA) and historically black colleges and universities (HBCU) from black community in US, UK, Caribbean and Africa. Find out more about your reader demographics, web-traffic, and valued added client services.

Colossal Black Holes Common In Early Universe, Spectacular Galactic Collision Suggests

Astronomers think that many - perhaps all - galaxies in the universe contain massive black holes at their centers. New observations with the Submillimeter Array now suggest that such colossal black holes were common even 12 billion years ago, when the universe was only 1.7 billion years old and galaxies were just beginning to form.

Violently Variable Black Holes Probed

Unique observations of the flickering light from the surroundings of two black holes provide new insights into the colossal energy that flows at their hearts. By mapping out how well the variations in visible light match those in X-rays on very short timescales, astronomers have shown that magnetic fields must play a crucial role in the way black holes swallow matter.

Colliding galaxies reveal colossal black holes were common in early universe

New observations made with the Submillimeter Array (SMA) of telescopes in Hawaii suggest that black holes — thought to exist in many, if not all, galaxies — were common even in the early universe, when galaxies were just forming. Astronomers have found two very different galaxies in the distant universe, both with colossal black holes at their heart, involved in a spectacular collision.

Colliding Galaxies Reveal Colossal Black Holes

Matt_dk writes "New observations made with the Submillimeter Array of telescopes in Hawaii suggest that black holes — thought to exist in many, if not all, galaxies — were common even in the early Universe, when galaxies were just beginning to form. Astronomers have found two very different galaxies in the distant Universe, both with colossal black holes at their hearts, involved in a spectacular collision."

VLT, Rossi Satellite Probe Variable Black Holes

Unique observations of the flickering light from the surroundings of two black holes provide new insights into the colossal energy that flows at their hearts. By mapping out how well the variations in visible light match those in X-rays on very short timescales, astronomers have shown that magnetic fields must play a crucial role in the way black holes swallow matter.

VLT and Rossi XTE satellite probe violently variable black holes

Unique observations of the flickering light from the surroundings of two black holes provide new insights into the colossal energy that flows at their hearts. By mapping out how well the variations in visible light match those in X-rays on very short timescales, astronomers have shown that magnetic fields must play a crucial role in the way black holes swallow matter.

Old Galactic Collision Points to Early Massive Black Holes

New observations performed by the Hawaii-based Submillimeter Array's eight antennas indicated that massive black holes had been common since the early ages of the universe. The recent discovery of the collision of two ancient galaxies brought new data on the behavior of black holes.

Black E-Commerce Reaches Untapped Market

(BlackNews.com) - Black e-Commerce (www.blackecommerce.com) is an exciting new e-commerce site that connects consumers to black-owned businesses and creates a buying power in an online environment. According to an ING survey, African Americans only spend five cents of each dollar they have in disposable income with black-owned businesses. By offering a vast array of goods like electronics and services like Webinars, Black e-Commerce aims to reinvest money back into black businesses and communities by providing a portal that crosses geographical divides.

Astronomers Study Flares From Black Hole

Astronomers have used two different telescopes simultaneously to study the violent flares from the supermassive black hole in the centre of the Milky Way. They have detected outbursts from this region, known as Sagittarius A*, which reveal material being stretched out as it orbits in the intense gravity close to the central black hole.

Black Silicon Discovery Could Change Digital Photography, Night Vision Forever

With the accidental discovery of "black silicon," Harvard physicists may have very well changed the digital photography, solar power and night vision industries forever. What is black silicon, you say? Well, it's just as it sounds. Black silicon. It's what this revolutionary new material does that's important, starting with light sensitivity. Early indications show black silicon is 100 to 500 times more sensitive to light than a traditional silicon wafer.

Hidden black holes may roam Milky Way

MASSIVE black holes may be roaming our galaxy, hidden inside strange star clusters. If unmasked, they could reveal the violent birth of the Milky Way.

Colossal black holes were common in early Universe

London, Oct 17 : Astronomers have found two very different galaxies in the distant Universe involved in a spectacular collision, which reveal that colossal black holes were common in the early Universe.

Telescope and satellite probe violently variable black holes

Unique observations of the flickering light from the surroundings of two black holes provide new insights into the colossal energy that flows at their hearts.

Podcast: Questions Show - Light speed, Andromeda Galaxy, Dark Matter and Black Holes

Another week, another roundup of your questions. This week listeners asked: will reaching light speed destroy the Universe? When is Andromeda going to look really, really cool with the unaided eye? Why didn't dark matter all turn into black holes? And there's even more. If you've got a question for the Astronomy Cast team, please email it in to info@astronomycast.com and we'll try to tackle it for a future show.

Black Inventors, Crafting Over 200 Years of Success by Keith C. Holmes [press release]

Black Inventors, Crafting Over 200 years of Success, clearly highlights the work of Black inventors from over seventy countries. The author, Keith C. Holmes, has spent more than twenty years researching information on inventions by Black people from Barbados, Trinidad and Tobago, Canada, France, Germany, Ghana, Haiti, Jamaica, Kenya, Nigeria, and South Africa, Trinidad and Tobago, to name a few. One cannot build any civilization without innovations, inventions, plans, financial resources, labor saving devices, materials and muscle .

Study: iPhones Twice As Reliable As BlackBerries - 5.6% iPhone failure rate after one year of ownership...

According to a new study (pdf) by SquareTrade (via Mobile Crunch), the iPhone is about twice as reliable as a Blackberry after one year of ownership. The study, which looked at approximately 15,000 phones covered under SquareTrade's extended warranties, found that the failure rate for iPhones after one year of use is 5.6 percent, compared to 11.2 percent for the RIM Blackberry and 16.2 percent for the Palm Treo. The study predicts that after two years of use, the iPhone failure rate will be between 9.2 and 11.3 percent, compared to two-year failure rates of 14.3 percent for BlackBerries and 21.0 percent for Treos.

Best Buy is Looking For Black Friday VIPs To Start The Insanity In Style

Black Friday's going to be longer and crazier this year, thanks to The Troubles. We got the memo. But Best Buy is jumping in with both feet—with their Black Friday VIP program, they're looking for a few good crazies to arrive in a limo sipping mimosas at 25 major metro Best Buys around the country, bright and early at 4:30 AM for the rare privilege of buying up some "doorbusters" (limit four) before the ravaging hordes with faces smashed against glass outside. Do you have what it takes?

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