3 ms·

The object is likely an active galactic core, so couldn't have been in our galaxy.

by lostmsu 4y ago

zasdffaa 4y ago
2.4 x 10^9 light years away, so not in our galaxy by a very large measure.
- actionfromafar 4y ago
  I think the meaning was more, that our galaxy can't produce such events, so that's one thing we don't have to worry about in our galaxy. Edit: a (to me) random site [0] says the Milky Way does not have an active galactic nucleus. 0: https://socratic.org/questions/does-the-milky-way-have-an-active-galactic-nucleus-is-it-or-is-it-a-type-1-or-ty https://socratic.org/questions/does-the-milky-way-have-an-ac...
  - zasdffaa 4y ago
    Okay, missed that. https://en.wikipedia.org/wiki/Active_galactic_nucleus https://en.wikipedia.org/wiki/Active_galactic_nucleus says "An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much-higher-than-normal luminosity over at least some portion of the electromagnetic spectrum with characteristics indicating that the luminosity is not produced by stars. Such excess non-stellar emission has been observed in the radio, microwave, infrared, optical, ultra-violet, X-ray and gamma ray wavebands. A galaxy hosting an AGN is called an "active galaxy". The non-stellar radiation from an AGN is theorized to result from the accretion of matter by a supermassive black hole at the center of its host galaxy." Do we? https://en.wikipedia.org/wiki/Sagittarius_A\ https://en.wikipedia.org/wiki/Sagittarius_A\* says "Sagittarius A*, abbreviated Sgr A* is the supermassive black hole[4][5][6] at the Galactic Center of the Milky Way" Front row seat! Get in!
    - codethief 4y ago
      Sgr A* isn't a very active black hole (meaning that it's accreting only very little matter), compared to black holes at the center of AGNs.
LargoLasskhyfv 4y ago
Is that so? There is the theory that our galaxy could be a Seyfert Galaxy, we just haven't witnessed it so far. https://link.springer.com/article/10.1007/BF00717870 https://link.springer.com/article/10.1007/BF00717870 https://earthsky.org/space/explosion-milky-way-center-seyfert-flare-magellanic-stream/ https://earthsky.org/space/explosion-milky-way-center-seyfer... https://www.bbc.com/news/science-environment-49955468 https://www.bbc.com/news/science-environment-49955468 Edit: I meant to say that our galaxy could, and has had such fits of rage, not that this event could have come from it.
voorwerpjes 4y ago
These types of GRBs are caused by the death of massive stars with low metallicity, not active galactic nuclei. There absolutely could be a GRB inside of the milky way galaxy pointed at us, but it is very unlikely.

The object is likely an active galactic core, so couldn't have been in our galaxy.

zasdffaa 4y ago

2.4 x 10^9 light years away, so not in our galaxy by a very large measure.

actionfromafar 4y ago
I think the meaning was more, that our galaxy can't produce such events, so that's one thing we don't have to worry about in our galaxy. Edit: a (to me) random site [0] says the Milky Way does not have an active galactic nucleus. 0: https://socratic.org/questions/does-the-milky-way-have-an-active-galactic-nucleus-is-it-or-is-it-a-type-1-or-ty https://socratic.org/questions/does-the-milky-way-have-an-ac...
- zasdffaa 4y ago
  Okay, missed that. https://en.wikipedia.org/wiki/Active_galactic_nucleus https://en.wikipedia.org/wiki/Active_galactic_nucleus says "An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much-higher-than-normal luminosity over at least some portion of the electromagnetic spectrum with characteristics indicating that the luminosity is not produced by stars. Such excess non-stellar emission has been observed in the radio, microwave, infrared, optical, ultra-violet, X-ray and gamma ray wavebands. A galaxy hosting an AGN is called an "active galaxy". The non-stellar radiation from an AGN is theorized to result from the accretion of matter by a supermassive black hole at the center of its host galaxy." Do we? https://en.wikipedia.org/wiki/Sagittarius_A\ https://en.wikipedia.org/wiki/Sagittarius_A\* says "Sagittarius A*, abbreviated Sgr A* is the supermassive black hole[4][5][6] at the Galactic Center of the Milky Way" Front row seat! Get in!
  - codethief 4y ago
    Sgr A* isn't a very active black hole (meaning that it's accreting only very little matter), compared to black holes at the center of AGNs.

LargoLasskhyfv 4y ago

Is that so? There is the theory that our galaxy could be a Seyfert Galaxy, we just haven't witnessed it so far. https://link.springer.com/article/10.1007/BF00717870 https://link.springer.com/article/10.1007/BF00717870 https://earthsky.org/space/explosion-milky-way-center-seyfert-flare-magellanic-stream/ https://earthsky.org/space/explosion-milky-way-center-seyfer... https://www.bbc.com/news/science-environment-49955468 https://www.bbc.com/news/science-environment-49955468 Edit: I meant to say that our galaxy could, and has had such fits of rage, not that this event could have come from it.

voorwerpjes 4y ago

These types of GRBs are caused by the death of massive stars with low metallicity, not active galactic nuclei. There absolutely could be a GRB inside of the milky way galaxy pointed at us, but it is very unlikely.