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Radio gamma international2/29/2024 These observations enabled the astronomers to produce ALMA’s first-ever time-lapse movie of a cosmic explosion, which revealed a surprisingly long-lasting reverse shockwave from the explosion echoing back through the jets. Laskar is lead author of the study, which appears in the Astrophysical Journal. “Since ALMA sees in millimeter-wavelength light, which carries information on how the jets interact with the surrounding dust and gas, it is a powerful probe of these violent cosmic explosions,” said Tanmoy Laskar, an astronomer at the University of California, Berkeley, and a Jansky Postdoctoral Fellow of the National Radio Astronomy Observatory. s, gaining new insights into this particular GRB and the size and composition of its powerful jets. ALMA was specifically designed to study this and shorter submillimeter-wavelength light. The waves vary in length from about 1 to 10 millimeters (between the infrared and radio portions of the spectrum). The unique capabilities of the Atacama Large Millimeter/submillimeter Array (ALMA), however, enabled a team of astronomers to make an extended study of this explosion at millimeter wavelength Millimeter wavelengthMillimeter-wavelength light is a sliver of the electromagnetic spectrum. This allowed astronomers to study the aftermath of this fantastically energetic event, known as GRB 161219B, with many ground-based observatories, including the National Science Foundation’s Very Large Array. While the gamma rays from the burst disappeared from view a scant seven seconds later, longer wavelengths of light from the explosion - including X-ray, visible light, and radio - continued to shine for weeks. known as a gamma-ray burst (GRB) toward Earth, where it was detected by NASA’s Neil Gehrels Swift Observatory on 19 December 2016. This newborn black hole belched a fleeting yet astonishingly intense flash of gamma rays Gamma raysGamma-rays have some of the smallest wavelengths and highest amount of energy compared to all other waves on the electromagnetic spectrum. and forming a black hole Black HoleAn object – typically a collapsed star – whose gravity is so strong that its escape velocity exceeds the speed of light. The remnant of these massive stars collapse into either a neutron star or a black hole. During this explosion, these stars may become as bright as all the other stars in a galaxy combined, and in which a great deal of matter is thrown off into space at high velocity and high energy. 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 SupernovaThe extremely violent explosion of a star many times more massive than our Sun after the nuclear furnace at its core can no longer balance out the force of gravity.
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