GW190521

GW190521
The GW event GW190521 observed by the LIGO Hanford (left), LIGO Livingston (middle), and Virgo (right) detectors
Date21 May 2019 Edit this on Wikidata
InstrumentLIGO, Virgo[1][2]
Right ascension12h 49m 42.3s[3]
Declination−34° 49′ 29″[3]
EpochJ2000.0
Distance5,300 megaparsecs (17,000 Mly)[4]
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GW190521 (initially S190521g)[5] was a gravitational wave signal resulting from the merger of two black holes. It was possibly associated with a coincident flash of light; if this association is correct, the merger would have occurred near a third supermassive black hole.[2][6] The event was observed by the LIGO and Virgo detectors on 21 May 2019 at 03:02:29 UTC,[7] and published on 2 September 2020.[4][5][8] The event had a Luminosity distance of 17 billion light years away from Earth,[note 1][5][9] within a 765 deg2 area[note 2][10] towards Coma Berenices, Canes Venatici, or Phoenix.[1][2][6][11]

At 85 and 66 solar masses (M☉) respectively, the two black holes comprising this merger are the largest progenitor masses observed to date.[12] The resulting black hole had a mass equivalent to 142 times that of the Sun, making this the first clear detection of an intermediate-mass black hole. The remaining 9 solar masses were radiated away as energy in the form of gravitational waves.[4][5][8]

  1. ^ a b "Superevent info - S190521g". LIGO. 21 May 2019. Archived from the original on 28 June 2020. Retrieved 25 June 2020.
  2. ^ a b c Cofield, Calla (25 June 2020). "Black Hole Collision May Have Exploded With Light". NASA. Archived from the original on 28 June 2020. Retrieved 25 June 2020.
  3. ^ a b Cite error: The named reference PRL-20200625 was invoked but never defined (see the help page).
  4. ^ a b c Abbott, R.; et al. (2 September 2020). "Properties and Astrophysical Implications of the 150 M ⊙ Binary Black Hole Merger GW190521". The Astrophysical Journal. 900 (1): L13. arXiv:2009.01190. Bibcode:2020ApJ...900L..13A. doi:10.3847/2041-8213/aba493.
  5. ^ a b c d Abbott, R.; et al. (2 September 2020). "GW190521: A Binary Black Hole Merger with a Total Mass of 150 M ⊙". Physical Review Letters. 125 (10): 101102. arXiv:2009.01075. Bibcode:2020PhRvL.125j1102A. doi:10.1103/PhysRevLett.125.101102. PMID 32955328.
  6. ^ a b Overbye, Dennis (25 June 2020). "Two Black Holes Colliding Not Enough? Make It Three - Astronomers claim to have seen a flash from the merger of two black holes within the maelstrom of a third, far bigger one". The New York Times. Archived from the original on 25 June 2020. Retrieved 25 June 2020.
  7. ^ "GW trigger S190521g ('GW 190521')". University of Leicester. 2020. Archived from the original on 28 June 2020. Retrieved 26 June 2020.
  8. ^ a b Martin (2 September 2020). "GW190521: The Most Massive Black Hole collision Observed To Date" (PDF). LIGO Scientific Collaboration. Archived (PDF) from the original on 4 September 2020. Retrieved 2 September 2020.
  9. ^ a b Cite error: The named reference NYT-20200903 was invoked but never defined (see the help page).
  10. ^ Mo, Geoffrey (21 May 2020). "GCN Circular - Number: 24640 - LIGO/Virgo S190521g: Updated sky localization". NASA. Archived from the original on 27 June 2020. Retrieved 27 June 2020.
  11. ^ Graduate Center, CUNY (25 June 2020). "Black hole collision may have exploded with light". Phys.org. Archived from the original on 26 June 2020. Retrieved 26 June 2020.
  12. ^ Siegel, Ethan (3 September 2020). "LIGO's Biggest Mass Merger Ever Foretells A Black Hole Revolution". Forbes. Archived from the original on 4 September 2020. Retrieved 5 September 2020.


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