Sunday February 24, 2019

NASA’s Chandra observatory spots oldest light in universe

0
//

NASA’s Chandra X-ray Observatory has evidence, that says astronomers have discovered a jet from a very distant supermassive black hole being illuminated by the oldest light in the universe.

The discovery found that after the Big Bang, the black holes having powerful jets may be more common than previously thought in the first few billion years.

After 2.7 billion years, the light detected from this jet was emitted. That was a fifth of its present age.

At this point, the intensity of the cosmic microwave background radiation (CMB) left over from the Big Bang was much greater than it is today.

Co-author Lukasz Stawarz of Jagiellonian University in Poland explained
“We essentially stumbled onto this remarkable jet because it happened to be in Chandra’s field of view while we were observing something else,”

The length of the jet, found in the system known as B3 0727+409, is at least 300,000 light years.

Many big jets which emittes supermassive black holes has been detected in the nearby universe, but how these jets give off X-rays has remained a matter of debate.

In B3 0727+409, it appears that the CMB is being boosted to X-ray wavelengths.

Aurora Simionescu at JAXA’s Institute of Space and Astronautical Studies (ISAS) who led the study, said.
“Because we are seeing this jet when the universe was less than three billion years old, the jet is about 150 times brighter in X-rays than it would be in the nearby Universe,”
Electrons in black hole jets usually emit strongly at radio wavelengths, so typically these systems are found using radio observations.

The discovery of the jet in B3 0727+409 is special because so far almost no radio signal has been detected from this object while it is easily seen in the X-ray image.

“Supermassive black hole activity, including the launching of jets, may be different in the early Universe than what we see later on,” noted study co-author Teddy Cheung of the Naval Research Laboratory in Washington, D.C.

By researching more, about these jets, scientists can start to grasp how the properties of supermassive black holes might change over billions of years.

The results were published in The Astrophysical Journal Letters.(IANS)

Next Story

Anticipated Problems That May Effect NASA’s Mars Mission

According to results from the first eight analog space crews, presented at the American Association for the Advancement of Science (AAAS) annual meeting in Washington, D.C., the astronauts are able to successfully complete tasks between 20 and 60 per cent of the time.

0
NASA has formalised plans to send a manned mission to Mars, a journey that could involve 250 million miles of travel on a small spacecraft.  Pixabay

Researchers are developing a predictive model to help NASA anticipate conflicts and communication breakdowns among crew members and tick off problems that may make or break the Mission to Mars.

NASA has formalised plans to send a manned mission to Mars, a journey that could involve 250 million miles of travel on a small spacecraft.

To understand the psychological demands of this Mars journey, Northwestern University has charted a multi-phase study conducted in two analog environments — HERA in the Johnson Space Center in Houston and the SIRIUS Mission in the NEK analog located in the Institute for Bio-Medical Problems (IBMP) in Russia.

The varsity will study the behaviour of analog astronaut crews on mock missions, complete with isolation, sleep deprivation, specially designed tasks and mission control, which mimics real space travel with delayed communication.

Mars
NASA has formalised plans to send a manned mission to Mars, a journey that could involve 250 million miles of travel on a small spacecraft. 
Pixabay

“Astronauts are super humans. They are people who are incredibly physically fit and extremely smart,” said Leslie DeChurch, Professor at Northwestern.

“We’re taking an already state-of-the-art crew selection system and making it even better by finding the values, traits and other characteristics that will allow NASA to compose crews that will get along,” DeChurch added.

HERA’s capsule simulator houses astronauts for up to 45 days — a mock mission control outside the capsule — that augments the realism with sound effects, vibrations and communication delays.

space
According to results from the first eight analog space crews, presented at the American Association for the Advancement of Science (AAAS) annual meeting in Washington, D.C., the astronauts are able to successfully complete tasks between 20 and 60 per cent of the time. Pixabay

Those on the inside undergo sleep deprivation and try to perform tasks. The researchers collect moment-to-moment metrics about individual performance, moods, psychosocial adaptation and more.

According to results from the first eight analog space crews, presented at the American Association for the Advancement of Science (AAAS) annual meeting in Washington, D.C., the astronauts are able to successfully complete tasks between 20 and 60 per cent of the time.

Also Read: Iran Doubts Europe’s Efforts To Keep Nuclear Deal Alive

The next phase of the research, which began on February 15, involves using the model to predict breakdowns and problems a new HERA crew will experience and making changes to “who works with whom, on what, and when”.

The experiment on the SIRIUS analog in Moscow, will begin on March 15, where four Russians and two Americans, will undertake a 120-day fictional mission around the moon, including a moon landing operation. (IANS)