Saturday, 23 September 2023



LATEST NEWS Diljit Dosanjh To Launch His Official Merchandise Soon, Here’s How You Can Avail The Early Access Offer Dr. Arun Kumar Mehta review Development scenario in Udhampur District ADC Poonch Tahir Mustafa Malik flags off Millet Walkathon Rally Civil Defence Unit Udhampur organises awareness workshop on Disaster Management DDC Reasi Babila Rakwal clears rent assessment cases Workshop on “protection of women against sexual harassment at workplace” concludes at GCW Udhampur J&K Bank dedicates Cash Recycler Machine to public at Mahanpur Branch DC Sachin Kumar Vaishya inspects patient care facilities in Government Sarwal Hospital GGZSMDC Reasi organises Declamation competition on “Truth and Non-violence” GDC Akhnoor, J&K Academy of Art, Culture and Languages host one day folk festival A positive turn on the Jassi and MITHOO story biopic film, Dear Jassi stay DC Reasi Babila Rakwal chairs NCORD meeting Arunachal Pardesh's Agriculture Minister visits IIKSTC Dussoo, Pampore Commissioner Secretary Mandeep Kaur visits Doda Baramulla emerges Victorious in Inter-District Kho Kho Under 19 Girls Competition Eid Milad-Un-Nabi (SAW) celebration preparations reviewed at Pulwama District CAPEX Budget reviewed at Handwara DC Kupwara Ayushi Sudan conducts day-long extensive tour of Tangdar & Teetwal DC Srinagar releases Education Assistance of Rs 1.034 Crore in favour of Wards of 1474 registered construction workers Gandhi Jayanti : District Kishtwar flags in Shanti Yatra 2023 Param Vir Chakra Recipient Captain Bana Singh named as Ambassador for ‘War against Waste’ in J&K


Brightest gamma-ray burst powered likely by unique jet structure : NASA

NASA, National Aeronautics and Space Administration, Washington, Nuclear Spectroscopic Telescope Array
Listen to this article

Web Admin

Web Admin

5 Dariya News

New York , 09 Jun 2023

The brightest ever gamma-ray burst, which was detected October last year, may have been powered by its unique jet structure, according to a new study.The burst known as GRB 221009A is known to be the largest explosion since the Big Bang. 

It was found to occur once in every 10,000 years and was 70 times brighter than any yet seen.However, scientists were not able to understand the reason.Now, in the study, published in the journal Science Advances, they used NASA's NuSTAR (Nuclear Spectroscopic Telescope Array) observations of the event to find how the collapsing star ejected a jet of material that had a shape not previously observed among gamma-ray burst jets, as well as other unique characteristics.

It's possible that the source of these distinctions is the progenitor star, the physical properties of which could influence the characteristics of the burst. It's also possible that an entirely different mechanism launches the very brightest jets into space, the scientists said.

"The only way to produce a different jet structure and vary the energy is to vary some property of the star that exploded, like its size, mass, density, or magnetic field," said Eleonora Troja, Professor of physics at the University of Rome, who led NuSTAR the observations of the event.

"That's because the jet has to basically force its way out of the star. So, for example, the amount of resistance it meets would potentially influence the features of the jet," Troja said.Gamma rays are the most energetic form of light in the universe yet invisible to the human eye.

But GRB 221009A, was a long gamma-ray burst, so bright that it effectively blinded most gamma-ray instruments in space. Scientists had to reconstruct the event with data from NASA's Fermi Gamma-ray Space Telescope to determine its actual brightness.

Dubbed as BOAT or brightest of all time, the GRB 221009A was also detected by Hubble and James Webb space telescopes, NASA's Wind and Voyager 1 spacecraft, as well as European Space Agency's Solar Orbiter.

Similar to other gamma-ray bursts, GRB 221009A had a jet that erupted from the collapsing star like it was shot into space from a fire hose, with gamma rays radiating from the hot gas and particles at the jet's core.

But in all previously observed gamma-ray bursts, the jet remained remarkably compact and there was little to no stray light or material outside the narrow beam.However, in GRB 221009A the jet had a narrow core with wider, sloping sides.

While some of the most energetic gamma-ray jets have shown similar properties, yet the energy of the material in GRB 221009A also varied.This means that instead of all the material in the jet having the same energy - like a single bullet shot from a gun -- the energy of the material changed with distance from the jet's core. This has never been observed in a long gamma-ray burst jet before, the scientists said.


Tags: NASA , National Aeronautics and Space Administration , Washington , Nuclear Spectroscopic Telescope Array



related news




Photo Gallery



Video Gallery



5 Dariya News RNI Code: PUNMUL/2011/49000
© 2011-2023 | 5 Dariya News | All Rights Reserved
Powered by: CDS PVT LTD