2020A&A...636A..82G

Query : 2020A&A...636A..82G

2020A&A...636A..82G - Astronomy and Astrophysics, volume 636A82-82 (2020/4-1)

Proton-synchrotron as the radiation mechanism of the prompt emission of gamma-ray bursts?

GHISELLINI G., GHIRLANDA G., OGANESYAN G., ASCENZI S., NAVA L., CELOTTI A., SALAFIA O.S., RAVASIO M.E. and RONCHI M.

Abstract (from CDS):

We discuss the new surprising observational results that indicate quite convincingly that the prompt emission of gamma-ray bursts (GRBs) is due to synchrotron radiation produced by a particle distribution that has a low-energy cut-off. The evidence of this is provided by the low-energy part of the spectrum of the prompt emission, which shows the characteristic Fν∝ν1/3 shape followed by Fν∝ν–1/2 up to the peak frequency. This implies that although the emitting particles are in fast cooling, they do not cool completely. This poses a severe challenge to the basic ideas about how and where the emission is produced, because the incomplete cooling requires a small value of the magnetic field to limit synchrotron cooling, and a large emitting region to limit the self-Compton cooling, even considering Klein-Nishina scattering effects. Some new and fundamental ingredient is required for understanding the GRBs prompt emission. We propose proton-synchrotron as a promising mechanism to solve the incomplete cooling puzzle.

Abstract Copyright: © ESO 2020

Journal keyword(s): radiation mechanisms: non-thermal - gamma-ray burst: general - gamma-rays: general

Simbad objects: 1

goto Full paper

goto View the references in ADS

Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GRB 160625B gB 20 34 23.67 +06 55 11.1           ~ 235 0

Query : 2020A&A...636A..82G

Basic data :
GRB 160625B -- Gamma-ray Burst
Other object types: otypes_help 		gB (2020ApJ,GRB,...), ev (AT)
ICRS coord. (ep=J2000) : 		20 34 23.67 +06 55 11.1 (X-ray) [ 2000 2000 0 ] D SWIFT
FK4 coord. (ep=B1950 eq=1950) : 		20 31 56.18 +06 44 50.0 [ 2000 2000 0 ]
Gal coord. (ep=J2000) : 		051.69676 -19.19277 [ 2000 2000 0 ]
Radial velocity / Redshift / cz : 		V(km/s) 211473 [300] / z(~) 1.406 [0.001] / cz 421508 [300]
   D 2018NatAs...2...69Z
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Identifiers (4) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

GRB 160625B AT 2019isx Fermi bn160625945 Fermi bn160625952

References (235 between 1850 and 2026) (Total 235)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

External archives :

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2020A&A...636A..82G and select 'bookmark this link' or equivalent in the popup menu