/var/www/vhosts/ziare/news//boxes/box1.php Merging Black Holes - News, Technology, Space, Science - Breaking News and interesting stories


 Fresh articles

» IOS6 news and fixes
» Strange Martian crater
» 100 Petabits per second
» Artificial life created
» Space rock contains organic molecular feast
» 10 Failed Doomsday Predictions
» Universal phone charger
» Moon buildings
» Epassports RFID danger
» 500Gb optical




Sexy things-> Sexy things (4)
Bulk-> Bulk (15)
Technology-> Technology (42)
Space-> Space (35)
UFO-> UFO (5)
Funny-> Funny (4)
Earth Life-> Earth Life (9)
Internet-> Internet (10)
Health-> Health (1)



 Most popular

» Google unifies search results
»Google under water
»Moon buildings
»500Gb optical
»Scientists Levitate Small Animals
»Jet stream is weakening
»Orion new nasa vehicle
»Saturns moon like ocean floor
»How Cells Store Fat



 Other articles

»Honda first hydrogen cars
»Diabetes tattoo
»Asteroid 2036
»New Material Heals Itself
»Samsung Unveils Mobile TV Chipset
»How To: Dismantle an Atomic Bomb
»IOS6 news and fixes
»Google under water
»Merging Black Holes
»Midori new operating system
»Are your Web surfing fingers getting tired?
»More Oxygen Could Make Giant Bugs on Earth
»Malaria new hope
»Russia building nuke barge to power Arctic
»Clouds Clues
»LCH stopped
»No internet
»Erotic and Violent Images Cloud Vision
»Orion new nasa vehicle
»Dark energy universe growth


Black Holes

Scientists have pinpointed the precise locations of a pair of supermassive black holes at the centers of two colliding galaxies 300 million light-years away.

Infrared images made by the Keck II telescope in Hawaii reveal the two black holes at the center of the galaxy merger known as NGC 6240 are each surrounded by a rotating disk of stars and cloudy stellar nurseries.

The new images are detailed in Science Express, an online publication of the journal Science.

Cosmic train wreck

Scientists had previously observed NGC 6240 in a piecemeal fashion, using different wavelengths of light. Images captured by the Hubble Space Telescope showed the outer parts of the colliding galaxies in visible light, and revealed long tidal tails made of orphaned stars, gas, and dust.

Subsequent X-ray observations by NASA's Chandra X-ray Observatory revealed the presence of two supermassive black holes at the center of each galaxy, and the Very Long Baseline Array spotted two radio sources in the galaxies' central regions. The problem was combining all of the images to form a single coherent picture.

"You have all these different telescopes and they look at the same piece of sky but see wildly different things," said study team member Willem de Vries of the University of California, Davis.

Keck II uses a relatively new type of imaging called adaptive optics, which uses an artificial laser-generated "guide star" as a reference and a rapidly deforming mirror to correct image distortions from the Earth's atmosphere in real time.

The Keck II images were of such high spatial resolution that scientists could identify features in NGC 6240 captured by the other telescopes in the optical, X-ray and radio wavelengths.

Like a Rosetta Stone, the Keck II images allowed scientists for the first time to calibrate the different images of NGC 6420.

"Now we can really see it all-the hot dust in the infrared, the stars in the visible and infrared, and the X-rays and radio emissions from right around the black holes," said study leader Claire Max at the University of California, Santa Cruz.

Co-evolutionMerging Black Holes

Scientists think galactic mergers are one of the primary ways galaxies form. Like heated wax in a lava lamp, two small galaxies can come together to form one larger one, or a blob of gas and stars might pinch off during a particularly messy galactic smash-up and, over cosmic time, the result evolves into a diminutive dwarf galaxy.

Our own Milky Way galaxy is expected to collide and merge with its neighbor Andromeda in a few billion years to form a large elliptical galaxy some scientists jokingly call "Milkomeda" or "Andromeda Way." When that occurs, a black hole merger similar to that of NGC 6420 could occur.

"We have a wimpier black hole than the two galaxies [in NGC 6420], but we have a black hole and we believe Andromeda does too," Max told SPACE.com.

When galaxies merge, the behemoth black holes at their centers merge and grow as well. Recent studies have shown that supermassive black holes help determine many properties of their host galaxies. Scientists say this idea, sometimes called "co-evolution," is among the most surprising realizations to emerge from astronomy in recent years.

"The gravitational influence of the black hole is actually limited to a relatively small region right around it, so how can it affect the rest of the galaxy?" Max said. "But if the black hole and the galaxy around it evolved together through the same sequence of merger events, that would explain the correlations."

Scientists estimate the two black holes in NGC 6240 will spiral into each other and merge in 10 million to 100 million years.

By Ker Than

 Read this article Email this article

Article © News, Technology, Space, Science - Breaking News and interesting storiesShare


You need to login first

Satellite Shooted down

  Did you know?...

- Women in ancient Egypt prevented pregnancy with
plugs made of crocodile droppings?

- Based on artifacts and cave paintings, Ice Age women were likely to enjoy sex as much as their male mates?

- In 2005, the average first time for US girls occurred at the age of 17?

- Known aphrodisiacs of the food world include chocolate, oysters and spicy foods?

- That females have a weaker sex drive than men is a  cultural misconception?

- The most common sexual problem among men is premature ejaculation?

- It is a common misconception that pregnancy can’t occur without male orgasm?

- Whether put to use or not, males produce about 300 million sperm every day?



CNN Page



Google News

World of Warcraft News

Romanian Web Hosting

Romanian Domain Registrar

.BIZ Domain Registrar


Funny Things

Golden Sands Bulgary

Web Hosting News

Web Hosting Romania

Gadgets Resources

Top Video Games Online



[New account] [Forgoten password]