Mysterious Cosmic Explosion Puzzles Astronomers

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A puzzling peep of X-rays has been rescued by NASA’s Chandra X-ray Observatory in a deepest X-ray picture ever obtained. This source expected comes from some arrange of mortal event, though might be of a accumulation that scientists have never seen before.

Animation of CDF-S Transient.
Credits: X-ray: NASA/CXC/Pontifical Catholic University/F. Bauer et al.

The X-ray source, located in a segment of a sky famous as a Chandra Deep Field-South (CDF-S), has conspicuous properties. Prior to Oct 2014, this source was not rescued in X-rays, though afterwards it erupted and became during slightest a cause of 1,000 brighter in a few hours. After about a day, a source had faded totally next a attraction of Chandra.

Thousands of hours of bequest information from a Hubble and Spitzer Space Telescopes helped establish that a eventuality expected came from a faint, tiny universe about 10.7 billion light years from Earth. For a few minutes, a X-ray source constructed a thousand times some-more appetite than all a stars in this galaxy.

“Ever given finding this source, we’ve been struggling to know a origin,” pronounced Franz Bauer of a Pontifical Catholic University of Chile in Santiago, Chile. “It’s like we have a jigsaw nonplus though we don’t have all of a pieces.”

Still Image of CDF-S Transient.
Credits: X-ray: NASA/CXC/Pontifical Catholic University/F. Bauer et al.

Two of a 3 categorical possibilities to explain a X-ray source plead gamma-ray detonate (GRB) events. GRBs are jetted explosions triggered possibly by a fall of a large star or by a partnership of a proton star with another proton star or a black hole. If a jet is indicating towards a Earth, a detonate of gamma rays is detected. As a jet expands, it loses appetite and produces weaker, some-more isotropic deviation during X-ray and other wavelengths.

Possible explanations for a CDF-S X-ray source, according to a researchers, are a GRB that is not forked toward Earth, or a GRB that lies over a tiny galaxy. A third probability is that a medium-sized black hole shredded a white dwarf star.

“None of these ideas fits a information perfectly,” pronounced co-author Ezequiel Treister, also of a Pontifical Catholic University, “but afterwards again, we’ve frequency if ever seen any of a due possibilities in tangible data, so we don’t know them good during all.”

The puzzling X-ray source was not seen during any other time during a dual and a half months of bearing time Chandra has celebrated a CDF-S region, that has been widespread out over a past 17 years. Moreover, no identical events have nonetheless to be found in Chandra observations of other tools of a sky.

This X-ray source in a CDF-S has opposite properties from a as nonetheless unexplained non-static X-ray sources rescued in a elliptical galaxies NGC 5128 and NGC 4636 by Jimmy Irwin and collaborators. In particular, a CDF-S source is expected compared with a drop of a proton star, white dwarf, or large star, and is roughly 100,000 times some-more radiant in X-rays. It is also located in a most smaller and younger horde galaxy, and is usually rescued during a single, several-hour burst.

“We might have celebrated a totally new form of cataclysmic event,” pronounced co-author Kevin Schawinski, of ETH Zurich in Switzerland. “Whatever it is, a lot some-more observations are indispensable to work out what we’re seeing.”

Additional rarely targeted searches by a Chandra repository and those of ESA’s XMM-Newton and NASA’s Swift satellite might expose some-more examples of this form of non-static intent that have until now left unnoticed. Future X-ray observations by Chandra and other X-ray telescopes might also exhibit a same materialisation from other objects.

If a X-ray source was caused by a GRB triggered by a partnership of a proton star with a black hole or another proton star, afterwards gravitational waves would also have been produced. If such an eventuality were to start most closer to Earth, within a few hundred million light years, it might be detectable with a Laser Interferometer Gravitational-Wave Observatory (LIGO).

Source: NASA


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