During observations of a spiral galaxy known as NGC 2082, astronomers have discovered a mysterious, bright and compact radio source. Its origin remains, to this day, unknown.
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From the center of the galaxy At the end of the 19th century, the development of astronomical instruments and nascent astrophotography had made it possible to discover…” data-image=”https://cdn.futura-sciences.com/buildsv6/ images/midioriginal/2/9/8/2986702f33_50035262_ngc-01.jpg” data-url=”https://news.google.com/sciences/definitions/astronomy-ngc-6380/” data-more=”Read more “>NGC 2082, a The disc contains several luminous arms which wind in a spiral around the bulb. The arms contain the stars…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/6/e/6/6e6981356f_50034127_galaxie-spirale-ngc-1187-eso.jpg ” data-url=”https://news.google.com/sciences/definitions/universe-spiral-galaxy-42/” data-more=”Read more”>spiral galaxy located approximately 60 million light-years away in the Set of small satellites…” data-url=”https://news.google.com/sciences/definitions/universe-constellation-21/” data-more= “Read more”>constellation sea bream, comes to us a strong radio signal of unknown origin. Revealed by astronomers during observation campaigns carried out in 2019 and 2021 by different telescopeshe responds to the sweet name of J054149.24-641813.7.
In a study published on arXivits discoverers have made several hypotheses about its origin, in particular by comparing it to other signals radio identified. It would recall in particular, by its spectral index and its brightness high, the fast radio burstsoften shortened by the acronym FRB for “Fast Radio Burst”. These flashes mysterious are able to release in a few thousandths of a second, as manyenergy that the Sun is the closest star to Earth, from which it is about 150 million kilometers away. The Sun is located 8.5 kparsecs from the center of the Milky Way. In star classification, the sun is a G2 type star.
The mass…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/1/d/9/1d9cd1d45f_50034577_eruption.jpg” data-url=”https://news. google.com/sciences/definitions/univers-soleil-3727/” data-more=”Read more”>Sun in a day, but their origin remains unidentified to this day.
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A quasar or a radio galaxy
Unfortunately, J054149.24-641813.7 does not reach a level of luminosity sufficient to be assimilated to a quick burst, according to the researchers. Few candidates then remain in the race: among them are quasars, pulsars and certain nebulae or radio galaxies. But almost every hypothesis has so far been ruled out. Too bright to match an optical remnant
This is the case, for example, of images that remain on the retina…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/1/7/9/1794d36c35_50035512_remanent-supernova -chandra-x-ray-nasa-cxc-b-gaensler-al.jpg” data-url=”https://news.google.com/planete/definitions/developpement-durable-remanent-6918/” data-more =”Read more”>remanent from Extract from…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/a/9/4/a940132305_50034136_supernova1987a.jpg” data-url=”https://news .google.com/sciences/definitions/universe-supernova-60/”data-more=”Read more”>supernova but ” not bright enough to be a source persistent radio with a built-in FRB progenitor”this mysterious source has a flat spectral index, that is to say a source which would be of thermal origin.
This spectral index also eliminates another possibility: the pulsara periodic signal from a neutron star which turns very quickly on itself. Only two possibilities remain: quasar and radio galaxy. Quasars correspond to active nuclei of very bright galaxies, which contain in their center a supermassive black hole, just like the From Earth, we can only observe a cross section…” data-image=”https:/ /cdn.futura-sciences.com/buildsv6/images/midioriginal/7/7/7/777b761907_120668_voie-lactee-galaxie.jpg” data-url=”https://news.google.com/sciences/definitions/universe- milkyway-3729/” data-more=”Read more”>Milky Way houses in its center Sagittarius A*.
As to radio galaxies, as their name suggests, they are galaxies whose emitted energy comes from radio waves due to synchrotron radiation. But, whether the source matches one or the other, ” we can expect to see some PHYSIOLOGY Penetration of a substance from outside into a living organism. Intestinal absorption: passage of nutrients from…” data-url=”https://news.google.com/sante/definitions/medecine-absorption-2910/” data-more=”Read more”>absorption from Hi; however, there is currently no Hi High data resolution for NGC 2082 “, conclude the researchers. The mystery still persists.
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