GRB 110328A

Coordinates: Sky map 16h 44m 49.97s, +57° 34′ 59.7″
Source: Wikipedia, the free encyclopedia.
GRB 110328A
Swift J1644+57 imaged by Hubble Space Telescope.
Event typeGamma-ray burst Edit this on Wikidata
Durationmonths, perhaps a year[1]
ConstellationDraco Edit this on Wikidata
Right ascension16h 44m 49.97s
Declination+57° 34′ 59.7″[2]
Distance3,800,000,000 ly (1.2×109 pc)
Total energy output5×1048 ergs (assuming beamed emission)
Other designationsGRB 110328A, Swift J164449.3+573451, 2MAXI J1645+576
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[edit on Wikidata]

Swift J164449.3+573451, initially referred to as GRB 110328A, and sometimes abbreviated to Sw J1644+57, was a

Draco constellation, about 3.8 billion light-years away.[4]

Studied by dozens of telescopes, it is one of the most puzzling cosmic blasts of high-energy radiation ever observed when it comes to brightness, variability and durability.[5] It probably occurred when a star wandered too close to the central black hole in the galaxy, and was gravitationally torn apart and swallowed by it.[3][6][7][8] Timing considerations suggest that the tidally disrupted star was a white dwarf and not a regular main sequence star.[9]

Debris now encircles the black hole in an accretion disk, which launches bipolar

jets
at near the speed of light. Jet plasma emits the
γ- and X-rays
. The beam of radiation from one of these jets points directly toward Earth, enhancing the apparent brightness. Repetitive dimming and softening of the X-rays implies that the jet temporarily tilts away from us, due to precession of the warped disk.[10]

The jets drive shocks into the surrounding interstellar medium, resulting in a

radio to infrared
afterglow. Detection of the relativistically expanding afterglow confirmed the identity of the host galaxy.[11] Observed linear polarization of the infrared radiation is consistent with synchrotron emission from the afterglow shock.[12]

"This is truly different from any explosive event we have seen before," said Joshua Bloom of the University of California at Berkeley, the lead author of the study published in the June 2011 issue of Science.[8][13]

See also

References

  1. ^ "Gamma-ray flash came from star being eaten by massive black hole". e! Science News. 2011-06-16. Retrieved 2011-06-17.
  2. Bibcode:2011cxo..pres....7.
    Retrieved 2011-04-21.
  3. ^
    Bibcode:2011GCN.11847....1B
    .
  4. ^ "GRB 110328A: Chandra Observes Extraordinary Event". Harvard-Smithsonian Center for Astrophysics. Retrieved 2011-04-21.
  5. Bibcode:2011cxo..pres....7.
    Retrieved 2011-04-22.
  6. arXiv:1104.2528 [astro-ph.HE
    ].
  7. ^ Coco, Alejandro (2011-04-10). "The Most Intense Cosmic Explosion Ever Seen". Scienceray. Archived from the original on 2011-07-24. Retrieved 2011-04-22.
  8. ^
    S2CID 31819412
    .
  9. S2CID 118446962
    .
  10. S2CID 54882171
    .
  11. S2CID 205226085
    .
  12. S2CID 53402046
    .
  13. ^ "Black hole eats star, triggers gamma-ray flash". Cosmos. June 17, 2011. Archived from the original on 18 June 2011. Retrieved 17 June 2011.


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