Source of sky’s x-ray glow revealed

Source of sky’s x-ray glow revealed

NASA’s funded X-ray Instrument has helped in resolving long-standing puzzle regarding X-rays glow observed over the entire sky.

The mission was named DXL, for Diffuse X-ray emission from the Local Galaxy and the astronomers have confirmed that much of this glow comes from a region of million-degree interstellar plasma called the local hot bubble, or LHB. The study also established upper limits on the amount of low-energy, or soft, X-rays produced within our planetary system by the solar wind, a gusty outflow of charged particles originating from the sun.

Steve Snowden, an astrophysicist at NASA’s Goddard Space Flight Center in Greenbelt, said that interactions between the solar wind and neutral atoms in comets, the outer atmospheres of planets, and even interstellar gas produces soft X-rays.

He further explained that this glow, known as the soft X-ray diffuse background, was surprisingly bright in the gas-rich central plane of the galaxy, where it should be strongly absorbed and this suggested that the background was a local phenomenon, arising from a bubble of hot gas extending out a few hundred light-years from the solar system in all directions.

Improved measurements also made it increasingly clear that the sun resides in a region where interstellar gas was unusually sparse. Taken together, the evidence suggested that the solar system was moving through a region that might have been blasted clear by one or more supernova explosions during the past 20 million years.

Related Post

Giant asteroids’ ‘smashing impact’ helped evolution on Ea...
views 293
A new study has found that giant asteroids' smashing the Earth's surface around 4 to 4.5 billion years ago, actually helped in its growth. Researcher...
Mysterious object at galaxy’s centre identified as pair of binary sta...
views 118
A team of researchers believe that they have solved the mystery of the bizarre object at the center of the galaxy. Research at University of Californi...
Space station captures UFO: VIDEO
views 78
The unidentified object appeared on live footage streamed from the International Space Station. The clip has since been posted on YouTube by user...
Scientists capture black hole eating a star
views 62
Astronomers have captured a black hole eating a star and then sicking a bit of it back up for the first time ever. The scientists tracked a star about...
New Pluto images puzzle scientists
views 65
NASA`s New Horizon spacecraft has captured stunning coloured images of Pluto as it gets ready for a close flyby of the mysterious planet system on Jul...

SHARE WHAT YOU THINK