Wednesday April 24, 2019

NASA’s Chandra X-ray Observatory detects mysterious Cosmic Explosion

The X-ray source, located in a region of the sky known as the Chandra Deep Field-South (CDF-S), has remarkable properties

0
//
Illustration of Chandra X Observatory

Washington, April 1, 2017: A mysterious flash of X-rays probably resulting from a “completely new type of cataclysmic event” in space has been discovered by NASA’s Chandra X-ray Observatory, a study says.

While the scientists believe the flash of X-rays, which stemmed from a faint, small galaxy about 10.7 billion light years from Earth, likely comes from some sort of destructive event, they are not sure what caused it.

NewsGram brings to you current foreign news from all over the world.

“We may have observed a completely new type of cataclysmic event,” said study co-author Kevin Schawinski, of ETH Zurich (Swiss Federal Institute of Technology in Zurich) in Switzerland.

“Whatever it is, a lot more observations are needed to work out what we’re seeing,” Schawinski added.

The X-ray source, located in a region of the sky known as the Chandra Deep Field-South (CDF-S), has remarkable properties.

NewsGram brings to you top news around the world today.

Prior to October 2014, this source was not detected in X-rays, but then it erupted and became at least a factor of 1,000 brighter in a few hours.

After about a day, the source had faded completely below the sensitivity of Chandra.

Thousands of hours of legacy data from the Hubble and Spitzer Space Telescopes helped determine that the event likely came from a faint, small galaxy about 10.7 billion light years from Earth.

For a few minutes, the X-ray source produced a thousand times more energy than all the stars in this galaxy, said the study published online in the journal Monthly Notices of the Royal Astronomical Society.

Check out NewsGram for latest international news updates.

“Ever since discovering this source, we’ve been struggling to understand its origin,” said Franz Bauer of the Pontifical Catholic University of Chile in Santiago.

“It’s like we have a jigsaw puzzle but we don’t have all of the pieces,” Bauer added.

There are three main possibilities to explain the X-ray source, according to scientists.

Two of them invoke gamma-ray burst (GRB) events which are jetted explosions triggered either by the collapse of a massive star or by the merger of a neutron star with another neutron star or a black hole.

If the jet is pointing towards the Earth, a burst of gamma rays is detected. As the jet expands, it loses energy and produces weaker, more isotropic radiation at X-ray and other wavelengths.

Possible explanations for the CDF-S X-ray source, according to the researchers, are a GRB that is not pointed toward Earth, or a GRB that lies beyond the small galaxy.

A third possibility is that a medium-sized black hole shredded a white dwarf star.

“None of these ideas fits the data perfectly, but then again, we’ve rarely if ever seen any of the proposed possibilities in actual data, so we don’t understand them well at all,” study co-author Ezequiel Treister, also of the Pontifical Catholic University, noted. (IANS)

Next Story

Spacecraft Test Runs into Serious Problems, Smoke All Over SpaceX in Florida

"Ensuring that our systems meet rigorous safety standards and detecting (issues) like this prior to flight are the main reasons why we test"

0
spaceX
Federal oversight authorities warned NASA last year that more delays could leave US astronauts stranded if the new capsules were not ready to fly in 2019. Pixabay

Thick plumes of smoke rose over a SpaceX facility in Florida during a test fire of a Crew Dragon spacecraft and the issue was serious, it could derail plans to fly astronauts aboard the capsule later this year, the media reported.

SpaceX, which was founded by billionaire businessman Elon Musk in 2002, said the craft was undergoing a “series of engine tests” at a facility in Cape Canaveral on Saturday, and something went wrong during the final stretch, CNN reported.

SpaceX will work with NASA to determine what caused the issue. No injuries were reported.

orbit
The US has not had the technology to fly humans to orbit since the space shuttle programme ended in 2011. Meanwhile, NASA has paid Russia about $80 million per seat to send astronauts to the International Space Station aboard Soyuz capsules. Pixabay

“Ensuring that our systems meet rigorous safety standards and detecting (issues) like this prior to flight are the main reasons why we test,” SpaceX said in a statement.

Crew Dragon is already overdue and more delays could make things tricky for NASA.

It was scheduled to conduct a key test of its emergency abort system in June. And its first crewed mission, which will carry astronauts Doug Hurley and Bob Behnken, was slated for July, though NASA recently said that timeline was under review.

space craft
Federal oversight authorities warned NASA last year that more delays could leave US astronauts stranded if the new capsules were not ready to fly in 2019. Pixabay

The US has not had the technology to fly humans to orbit since the space shuttle programme ended in 2011. Meanwhile, NASA has paid Russia about $80 million per seat to send astronauts to the International Space Station aboard Soyuz capsules.

NASA has also decided to ask the private sector to design and build a new generation of spacecrafts.

Also Read: Avoid Smoking During Pregnancy To Prevent Premature Births

SpaceX and Boeing, which is building a vehicle called Starliner, were awarded contracts worth up to $2.6 billion and $4.2 billion, respectively, in 2014. Both capsules were supposed to start flying in 2017, but they have been hampered with delays.

Federal oversight authorities warned NASA last year that more delays could leave US astronauts stranded if the new capsules were not ready to fly in 2019. (IANS)