MessageToEagle.com

Mysterious Flares Emitting From Sagittarius A

9 February, 2012

Share this story:
Follow us:

MessageToEagle.com - In our Milky Way there is a super massive black hole known as Sagittarius A* (Sgr A*, for short).

Astronomers have for years observed observing X-ray flares about once a day from Sgr A*.

The cause of these flares has so far been a great puzzle, but that might change now.

A new study indicates that a cloud, containing hundreds of trillions of asteroids and comets around the black hole could actually be responsible for the daily flares.

Asteroid and comets inside the cloud have been stripped from their parent stars and found a new home inside the could.

The flares have been observed by Chandra using intermittent observations. The flares have also been seen in infrared data from ESO's Very Large Telescope in Chile.

It is believed that there is a supermassive black hole at the Galactic Center of the Milky Way. Credit: ESO

The panel on the left is an image containing nearly a million seconds of Chandra observing of the region around the black hole, with red representing low-energy X-rays, green as medium-energy X-rays, and blue being the highest.

An asteroid that undergoes a close encounter with another object, such as a star or planet, can be thrown into an orbit headed towards Sgr A*, as seen in a series of artist's illustrations beginning with the top-right panel.

If the asteroid passes within about 100 million miles of the black hole, roughly the distance between the Earth and the Sun, it would be torn into pieces by the tidal forces from the black hole (middle-right panel).

These fragments would then be vaporized by friction as they pass through the hot, thin gas flowing onto Sgr A*, similar to a meteor heating up and glowing as it falls through Earth's atmosphere. A flare is produced (bottom-right panel) and eventually the remains of the asteroid are swallowed by the black hole.


Click on image to enlarge

Credit: Chandra

Another solar system analogy for this type of event has recently been reported. About once every three days a comet is destroyed when it flies into the hot atmosphere of the Sun. So, despite the significant differences in the two environments, the destruction rate of comets and asteroids by the Sun and Sgr A* may be similar.

Very long observations of Sgr A* will be made with Chandra later in 2012 that will give valuable new information about the frequency and brightness of flares and should help to test the model proposed here to explain them. This work has the potential to understand the ability of asteroids and planets to form in the harsh environment of Sgr A*.

See also: Super Massive Black Holes Lurking In The Hearts Of Galaxies

Intimate Connection Between Black Holes And New-Born Stars

Follow MessageToEagle.com for the latest news on Facebook and Twitter !

Don't Miss Our Stories! Get Our Daily Email Newsletter

Enter your email address:


Once you have confirmed your email address, you will be subscribed to the newsletter.

Recommend this article:

Subscribe To Our News!

Grab the latest RSS feeds right to your reader, desktop or mobile phone.

Subscribe to RSS headline updates from:
Powered by FeedBurner

Go to - MAIN PAGE

Copyright @ MessageToEagle.com All rights reserved.
Go to - MAIN PAGE

Other Popular Articles

Radio Emission From Ultracool Dwarf Detected By Arecibo Telescope
The Arecibo Telescope in Puerto Rico has discovered sporadic bursts of polarized radio emission from the T6.5 brown J1047+21.
Because Arecibo is a single, fixed-dish telescope, it has a restricted practical sensitivity to weak, quiescent emission from radio sources...


Monster Star Thousand Times Bigger Than Our Sun Could Soon Explode - with video
Despite its enormous size, the star has not been identified as yellow hypergiant until recently...


Star Changes Into An Incredible Diamond Planet - with video
How can a star change into a diamond planet? Astronomical discoveries show that what sounds like science fiction is actually reality...


Astronomical Mystery: Giant Alien Planet Orbiting Three Suns
Binary stars are well-known and even trinary systems may be common but most of them are crowded together and thus, difficult to find and study. Additionally, it has long been considered they are inhospitable to planets...


Unusual Sounds From Space Reported Worldwide - What Are They?
For almost a year now people from different countries have reported hearing strange sound from the sky. Now scientists propose that what people are hearing is only a small fraction of the actual power of these sounds! What are these sounds? What is causing them? Are they in anyway related to our Sun and the biggest solar flares, do they come from Earth's inner core or can they be attributed to an unknown an astronomical phenomenon? Are they in anyway dangerous to our planet?


Intimate Connection Between Black Holes And New-Born Stars
Astronomers have known for some time that black holes and supermassive black holes accretion and star formation appear intimately connected.
However, it does not mean that powerful gravitational forces of the black holes disrupt surrounding material in their vicinity.


Power To See Most Distant Objects In The Universe
The 3C294, is one of the most distant galaxies recorded by Chandra, the most sophisticated X-ray observatory ever built. The cluster 3C294 is even 40 percent farther (!) than the next most distant x-ray galaxy cluster. Chandra focus on X-rays from high-energy regions of the Universe and see the invisible. It is so sensitive that it can capture images of particles as they disappear into a black hole deep in outer space.


Mysterious Jelly-Like Blue Spheres That Fell From The Sky Are Not Of Meteorological Origin
Residents in United Kingdom were baffled when they suddenly saw strange jelly-like blue spheres falling from they sky. Steve Hornsby, a former aircraft engineer from Bournemouth found these strange spheres in his garden, last Thursday. "The sky went a really dark yellow colour."

W3Counter