Jun 14, 2020

For The First Time, Astronomers Watch a Neutron Star Power Up Before an X-Ray Blast


For the first time, Australian-led astronomers were able to watch the entire process of a neutron star absorbing material and eventually unleashing a powerful blast of X-rays.
Scientists have long wondered why neutron stars create these violent outbursts.
This time around, it took 15 scientists from five institutes using seven observatories in order to gather the complete data set, according to a Monash University press release. And with that data in hand, the scientists hope to finally make sense of these massive X-ray blasts.
After 12 days of absorbing matter from its accretion disk - matter swirling around in a ring or spiral - the neutron star blasted out a jet of X-rays several thousand times brighter than our Sun.
"These observations allow us to study the structure of the , and determine how quickly and easily material can move inwards to the neutron star," said lead researcher Adelle Goodwin.
"Using multiple telescopes that are sensitive to light in different energies we were able to trace that the initial activity happened near the , in the outer edges of the accretion disk, and it took 12 days for the disk to be brought into the hot state and for material to spiral inward to the neutron star, and X-rays to be produced," she said.
Before this study, scientists thought the pre-outburst accretion phase only lasted two or three days at most.
The explosion lasted weeks, according to the research, which was accepted for publication in the journal Monthly Notices of the Royal Astronomical Society. During that brief window, it gave off as much energy as our Sun does in a decade.
Ultimately, scientists hope to use this unusually-comprehensive data set to improve their understanding of neutron stars and, ultimately, make better sense of the universe.
"This work enables us to shed some light on the physics of accreting neutron star systems, and to understand how these explosive outbursts are triggered in the first place, which has puzzled astronomers for a long time," New York University researcher David Russell said in the release.
ScienceAlert Editor's note (14 June 2020): The original version of this syndicated articled did not include mention of the paper's lead author, Adelle Goodwin. We have edited the story to amend that oversight.
This article was originally published by Futurism. Read the original article.

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