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Title: The photospheric origin of the Yonetoku relation in gamma-ray bursts

Journal Article · · Nature Communications
 [1]; ORCiD logo [2];  [1]; ORCiD logo [3];  [4];  [5]
  1. RIKEN, Saitama (Japan)
  2. Univ. of Leeds (United Kingdom)
  3. RIKEN, Saitama (Japan); Univ. of Leeds (United Kingdom)
  4. RIKEN, Saitama (Japan); Purdue Univ., West Lafayette, IN (United States)
  5. Kanazawa Univ., Ishikawa (Japan)

Long duration gamma-ray bursts (GRBs), the brightest events since the Big Bang itself, are believed to originate in an ultra-relativistic jet breaking out from a massive stellar envelope. Despite decades of study, there is still no consensus on their emission mechanism. One unresolved question is the origin of the tight correlation between the spectral peak energy and peak luminosity discovered in observations. This Yonetoku relation is the tightest correlation found in the properties of the prompt phase of GRB emission, providing the best diagnostic for the radiation mechanism. Here we present three-dimensional hydrodynamical simulations, and post-process radiation transfer calculations, of photospheric emission from a relativistic jet. Our simulations reproduce the Yonetoku relation as a natural consequence of viewing angle. Although jet dynamics depend sensitively on luminosity, the correlation holds regardless. This result strongly suggests that photospheric emission is the dominant component in the prompt phase of GRBs.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); JPS KAKENHI; National Aeronautics and Space Administration (NASA)
Grant/Contract Number:
SC0016369; JP16K21630; JP16KK0109; AST-1306672; 80NSSC17K0757; JP16H06342; JP18H04580
OSTI ID:
1612504
Journal Information:
Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (7)

High efficiency photospheric emission entailed by formation of a collimation shock in gamma-ray bursts journal July 2019
Investigating Subphotospheric Dissipation in Gamma-Ray Bursts Using Joint FermiSwift Observations journal July 2019
The Ep,i–Eiso correlation: type I gamma-ray bursts and the new classification method journal December 2019
Propagation, cocoon formation, and resultant destabilization of relativistic jets journal October 2019
High efficiency photospheric emission entailed by formation of a collimation shock in gamma-ray bursts text January 2019
Propagation, cocoon formation, and resultant destabilization of relativistic jets text January 2019
The Ep,i - Eiso correlation: type I gamma-ray bursts and the new classification method text January 2019