Astronomy:GRB 190114C

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Short description: Notable high energy gamma ray burst explosion
GRB 190114C
Gamma-ray-burst-GRB190114.jpg
The Hubble Space Telescope caught the fading afterglow of GRB 190114C and its home galaxy on February 11 and March 12, 2019. The difference between these images reveals a faint, short-lived glow (center of the green circle) located about 800 light-years from the galaxy’s core. Blue colors beyond the core signal the presence of hot, young stars, indicating that this is a spiral galaxy somewhat similar to our own. The source of the burst is located about 4.5 billion light-years away in the direction of the constellation Fornax.
Right ascension 03h 38m 1.63s[1]
Declination−26° 56′ 48.1″[1]
[edit on Wikidata]

GRB 190114C was an extreme gamma-ray burst explosion from a galaxy 4.5 billion light years away (z=0.4245;[2] magnitude=15.60est[3]) near the Fornax constellation,[4][5][6] that was initially detected in January 2019.[3][7] The afterglow light emitted soon after the burst was found to be tera-electron volt radiation from inverse Compton emission, identified for the first time.[8] According to the astronomers, "We observed a huge range of frequencies in the electromagnetic radiation afterglow of GRB 190114C. It is the most extensive to date for a gamma-ray burst."[8] Also, according to other astronomers, "light detected from the object had the highest energy ever observed for a GRB: 1 Tera electron volt (TeV) -- about one trillion times as much energy per photon as visible light";[4] another source stated, "the brightest light ever seen from Earth [to date].".[9]

Significance

Recent publications following the event indicate that inverse Compton scattering is the mechanism responsible for producing TeV photons.[8] X-ray photons are scattered off of the GRB's polar jets of electrons, which move at 0.9999c. In a scattering event, much of the energy of a relativistic electron is transferred to a photon.[10][11][12][13] Researchers "have been trying to observe such very high energy emission from GRB's for a long time, so this detection is considered a milestone in high-energy astrophysics".[4][14] The most recent studies propose, in summary, a model of binary system of hypernova (BdHN I) with two neutron stars, where one of them collapses in a black hole, surrounded by an accretion disk and from whose poles the GRB is launched.[15][16]

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See also

References

  1. ↑ 1.0 1.1 Staff (2019). "SIMBAD - GRB 190114C". SIMBAD. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GRB+190114C. Retrieved 20 November 2019. 
  2. ↑ Staff (2019). "GRB 190114C". University of Chicago. http://tevcat.uchicago.edu/?mode=1;id=324. Retrieved 24 November 2019. 
  3. ↑ 3.0 3.1 Palmer, David (14 January 2019). "GRB 190114C: Swift detection of a very bright burst with a bright optical counterpart". Goddard Space Flight Center. https://gcn.gsfc.nasa.gov/gcn/gcn3/23688.gcn3. Retrieved 20 November 2019. 
  4. ↑ 4.0 4.1 4.2 ESA/Hubble Information Centre (20 November 2019). "Hubble studies gamma-ray burst with the highest energy ever seen". EurekAlert!. https://www.eurekalert.org/pub_releases/2019-11/eic-hsg112019.php. Retrieved 20 November 2019. 
  5. ↑ Byrd, Deborah (24 November 2019). "Epic cosmic explosion detected via faster-than-light particles - Space-based observatories detected a violent explosion in a galaxy billions of light-years away. It became the brightest source of high-energy cosmic gamma rays seen so far. Specialized Earth-based telescopes detected it via faster-than-light particles cascading through Earth's atmosphere.". Earth & Sky. https://earthsky.org/space/jan-14-2019-gamma-ray-burst-brightest-so-far. Retrieved 24 November 2019. 
  6. ↑ Zhang, Ben (20 November 2019). "Extreme emission seen from γ-ray bursts - Cosmic explosions called γ-ray bursts are the most energetic bursting events in the Universe. Observations of extremely high-energy emission from two γ-ray bursts provide a new way to study these gigantic explosions.". Nature 575 (7783): 448–449. doi:10.1038/d41586-019-03503-6. PMID 31748718. 
  7. ↑ Mirzoyan, Razmik (15 January 2019). "First time detection of a GRB at sub-TeV energies; MAGIC detects the GRB 190114C". The Astronomer's Telegram. http://www.astronomerstelegram.org/?read=12390. Retrieved 20 November 2019. 
  8. ↑ 8.0 8.1 8.2 University of Johannesburg (22 November 2019). "Caught in afterglow: 1st detection of Inverse Compton emission from dying gamma-ray burst". EurekAlert!. https://www.eurekalert.org/pub_releases/2019-11/uoj-cia112219.php. Retrieved 23 November 2019. 
  9. ↑ Wood, Tom (22 November 2019). "Scientists Detect Biggest Explosion In The Universe Since The Big Bang". LADbible. https://www.ladbible.com/news/technology-scientists-detect-biggest-explosion-in-the-universe-since-the-big-bang-20191122. Retrieved 23 November 2019. 
  10. ↑ Evgeny Derishev (2019). "The Physical Conditions of the Afterglow Implied by MAGIC's Sub-TeV Observations of GRB 190114C". The Astrophysical Journal 2019 (2): L27. doi:10.3847/2041-8213/ab2d8a. Bibcode: 2019ApJ...880L..27D. 
  11. ↑ The H.E.S.S. collaboration (2019). "A very-high-energy component deep in the γ-ray burst afterglow". Nature 2019 (7783): 464–467. doi:10.1038/s41586-019-1743-9. PMID 31748724. Bibcode: 2019Natur.575..464A. 
  12. ↑ The MAGIC collaboration (2019). "Teraelectronvolt emission from the γ-ray burst GRB 190114C". Nature 2019 (7783): 455–458. doi:10.1038/s41586-019-1750-x. PMID 31748726. Bibcode: 2019Natur.575..455M. 
  13. ↑ The MAGIC Collaboration (2019). "Observation of inverse Compton emission from a long γ-ray burst". Nature 2019 (7783): 459–463. doi:10.1038/s41586-019-1754-6. PMID 31748725. Bibcode: 2019Natur.575..459M. 
  14. ↑ Veres, P (20 November 2019). "Observation of inverse Compton emission from a long γ-ray burst". Nature 575 (7783): 459–463. doi:10.1038/s41586-019-1754-6. PMID 31748725. Bibcode: 2019Natur.575..459M. https://www.nature.com/articles/s41586-019-1754-6. Retrieved 20 November 2019. 
  15. ↑ Ruffini, R.; Fuksman, J. D. Melon; Vereshchagin, G. V. (2019). "On the Role of a Cavity in the Hypernova Ejecta of GRB 190114C". The Astrophysical Journal 883 (2): 191. doi:10.3847/1538-4357/ab3c51. Bibcode: 2019ApJ...883..191R. 
  16. ↑ Rueda, J. A.; Ruffini, Remo; Karlica, Mile; Moradi, Rahim; Wang, Yu (2020). "Magnetic Fields and Afterglows of BdHNe: Inferences from GRB 130427A, GRB 160509A, GRB 160625B, GRB 180728A, and GRB 190114C". The Astrophysical Journal 893 (2): 148. doi:10.3847/1538-4357/ab80b9. Bibcode: 2020ApJ...893..148R. 

Further reading

External links

Coordinates: Sky map 03h 38m 1.63s, −26° 56′ 48.1″



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