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Enduring 'radio rebound' powered by jets from gamma-ray burst 5nvklj





Enduring 'radio rebound' powered by jets from gamma-ray burst 9tpt39

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Enduring 'radio rebound' powered by jets from gamma-ray burst

Dragon
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Post by Dragon Mon Jul 30, 2018 7:30 pm

In the blink of an eye, a massive star more than 2 billion light-years away lost a million-year-long fight against gravity and collapsed, triggering a supernova and forming a black hole at its center.

This newborn black hole belched a fleeting yet astonishingly intense flash of gamma rays known as a gamma-ray burst (GRB) toward Earth, where it was detected by NASA's Neil Gehrels Swift Observatory on 19 December 2016.

Continued...
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Enduring 'radio rebound' powered by jets from gamma-ray burst 334pu7m
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Post by Dragon Mon Jul 30, 2018 7:31 pm

Enduring 'radio rebound' powered by jets from gamma-ray burst Enduringradi
Credit: ALMA (ESO/NAOJ/NRAO), T. Laskar; NRAO/AUI/NSF, B. Saxton

ALMA's time-lapse movie showing the "afterglow" of a powerful gamma-ray burst. These images of the millimeter-wavelength light reveal details about the energy in the GRB's jets.

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Enduring 'radio rebound' powered by jets from gamma-ray burst 334pu7m
Dragon
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Post by Dragon Mon Jul 30, 2018 7:32 pm

Enduring 'radio rebound' powered by jets from gamma-ray burst Enduringradi
Credit: NRAO/AUI/NSF, S. Dagnello

Artist impression of the "reverse shock" echoing back though the jets of the gamma-ray burst (GRB 161219B).

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Enduring 'radio rebound' powered by jets from gamma-ray burst 334pu7m
Dragon
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Post by Dragon Mon Jul 30, 2018 7:34 pm



Astronomers caught the enduring "afterglow" of one of these cataclysmic explosions with both ALMA and the VLA for the first time.

The rebound, or reverse shock, triggered by the GRB’s powerful jets slamming into surrounding debris, lasted thousands of times longer than expected, giving astronomers an unprecedented glimpse into the structure and dynamics of the jets.


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Enduring 'radio rebound' powered by jets from gamma-ray burst 334pu7m
Dragon
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Post by Dragon Mon Jul 30, 2018 7:35 pm



A record breaking Gamma-ray burst captured by NASA's Fermi Gamma-ray Telescope is depicted in the first animation as the comparatively bright spot in the sky and in the second more detailed animation showing only a 20-degree-wide region of the sky.


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Enduring 'radio rebound' powered by jets from gamma-ray burst 334pu7m
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Post by Cloud Tue Jul 31, 2018 12:41 am

Wow.

Also found this

Earth's atmosphere is very effective at absorbing high energy electromagnetic radiation such as x-rays and gamma rays, so these types of radiation would not reach any dangerous levels at the surface during the burst event itself

Good to know cheers


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