Photospheres in gamma-ray bursts: A critical overview

Asaf Pe’Er

doi:10.1142/9789814623995_0277

Photospheres in gamma-ray bursts: A critical overview

Asaf Pe’Er

Harvard-Smithsonian Center for Astrophysics
University College Cork

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

I review some key observables seen during gamma-ray bursts (GRB) prompt emission phase. These include: the narrow distribution of the peak energy at the sub-MeV range, the peak energy - luminosity relation and the clustering of the low energy spectral slope index around 〈α〉 ∼ −1. I confront the different theoretical suggestions with these observations, discussing: (1) optically thin emission models; (2) pure ”Planck”spectra; (3) broadened ”Planck” spectra, caused by (a) sub-photospheric heating, and (b) geometrical broadening. I discuss the success and failure of each of these models in explaining the observed spectra.

Original language	English
Title of host publication	On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories
Editors	Robert T. Jantzen, Kjell Rosquist, Remo Ruffini, Remo Ruffini
Publisher	World Scientific
Pages	1765-1767
Number of pages	3
ISBN (Print)	9789814612142
DOIs	https://doi.org/10.1142/9789814623995_0277
State	Published - 2015
Externally published	Yes
Event	13th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation, and Relativistic Field Theories, MG13 2012 - Stockholm, Sweden Duration: 1 Jul 2015 → 7 Jul 2015

Publication series

Name	The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proceedings of the MG13 Meeting on General Relativity, 2012
Volume	0

Conference

Conference	13th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation, and Relativistic Field Theories, MG13 2012
Country/Territory	Sweden
City	Stockholm
Period	1/07/15 → 7/07/15

Bibliographical note

Publisher Copyright:
© 2015, World Scientific. All rights reserved.

Keywords

Gamma-rays: bursts
Radiation mecha-nism: thermal
Radiation mechanism: non-thermal

Access to Document

10.1142/9789814623995_0277

Cite this

Pe’Er, A. (2015). Photospheres in gamma-ray bursts: A critical overview. In R. T. Jantzen, K. Rosquist, R. Ruffini, & R. Ruffini (Eds.), On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories (pp. 1765-1767). (The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proceedings of the MG13 Meeting on General Relativity, 2012; Vol. 0). World Scientific. https://doi.org/10.1142/9789814623995_0277

Pe’Er, Asaf. / Photospheres in gamma-ray bursts : A critical overview. On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories. editor / Robert T. Jantzen ; Kjell Rosquist ; Remo Ruffini ; Remo Ruffini. World Scientific, 2015. pp. 1765-1767 (The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proceedings of the MG13 Meeting on General Relativity, 2012).

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title = "Photospheres in gamma-ray bursts: A critical overview",

abstract = "I review some key observables seen during gamma-ray bursts (GRB) prompt emission phase. These include: the narrow distribution of the peak energy at the sub-MeV range, the peak energy - luminosity relation and the clustering of the low energy spectral slope index around 〈α〉 ∼ −1. I confront the different theoretical suggestions with these observations, discussing: (1) optically thin emission models; (2) pure ”Planck”spectra; (3) broadened ”Planck” spectra, caused by (a) sub-photospheric heating, and (b) geometrical broadening. I discuss the success and failure of each of these models in explaining the observed spectra.",

keywords = "Gamma-rays: bursts, Radiation mecha-nism: thermal, Radiation mechanism: non-thermal",

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note = "Publisher Copyright: {\textcopyright} 2015, World Scientific. All rights reserved.; 13th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation, and Relativistic Field Theories, MG13 2012 ; Conference date: 01-07-2015 Through 07-07-2015",

year = "2015",

doi = "10.1142/9789814623995\_0277",

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Pe’Er, A 2015, Photospheres in gamma-ray bursts: A critical overview. in RT Jantzen, K Rosquist, R Ruffini & R Ruffini (eds), On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories. The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proceedings of the MG13 Meeting on General Relativity, 2012, vol. 0, World Scientific, pp. 1765-1767, 13th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation, and Relativistic Field Theories, MG13 2012, Stockholm, Sweden, 1/07/15. https://doi.org/10.1142/9789814623995_0277

Photospheres in gamma-ray bursts: A critical overview. / Pe’Er, Asaf.
On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories. ed. / Robert T. Jantzen; Kjell Rosquist; Remo Ruffini; Remo Ruffini. World Scientific, 2015. p. 1765-1767 (The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proceedings of the MG13 Meeting on General Relativity, 2012; Vol. 0).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - I review some key observables seen during gamma-ray bursts (GRB) prompt emission phase. These include: the narrow distribution of the peak energy at the sub-MeV range, the peak energy - luminosity relation and the clustering of the low energy spectral slope index around 〈α〉 ∼ −1. I confront the different theoretical suggestions with these observations, discussing: (1) optically thin emission models; (2) pure ”Planck”spectra; (3) broadened ”Planck” spectra, caused by (a) sub-photospheric heating, and (b) geometrical broadening. I discuss the success and failure of each of these models in explaining the observed spectra.

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KW - Radiation mecha-nism: thermal

KW - Radiation mechanism: non-thermal

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Pe’Er A. Photospheres in gamma-ray bursts: A critical overview. In Jantzen RT, Rosquist K, Ruffini R, Ruffini R, editors, On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories. World Scientific. 2015. p. 1765-1767. (The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proceedings of the MG13 Meeting on General Relativity, 2012). doi: 10.1142/9789814623995_0277

Photospheres in gamma-ray bursts: A critical overview

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Keywords

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