Time-dependent photoionization opacities in dense gamma-ray burst environments

Davide Lazzati; Rosalba Perna; Gabriele Ghisellini

doi:10.1046/j.1365-8711.2001.04735.x

Time-dependent photoionization opacities in dense gamma-ray burst environments

Davide Lazzati
, Rosalba Perna
, Gabriele Ghisellini

Physics and Astronomy

University of Cambridge
Osservatorio Astronomico di Brera

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

The recent detection of a transient absorption feature in the X-ray prompt emission of GRB 990705 showed the importance of such observations in the understanding of gamma-ray bursts and their progenitors. We investigate the time dependence of photoionization edges during the prompt emission of bursts in different environments. We show that their variability can be used to infer the density and geometry of the surrounding medium, giving important clues to unveil the nature of the burst progenitor.

Original language	English
Pages (from-to)	L19-L23
Journal	Monthly Notices of the Royal Astronomical Society
Volume	325
Issue number	4
DOIs	https://doi.org/10.1046/j.1365-8711.2001.04735.x
State	Published - Aug 21 2001

Keywords

Gamma-rays: bursts
Line: formation
X-rays: general
X-rays: ISM

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10.1046/j.1365-8711.2001.04735.x

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title = "Time-dependent photoionization opacities in dense gamma-ray burst environments",

abstract = "The recent detection of a transient absorption feature in the X-ray prompt emission of GRB 990705 showed the importance of such observations in the understanding of gamma-ray bursts and their progenitors. We investigate the time dependence of photoionization edges during the prompt emission of bursts in different environments. We show that their variability can be used to infer the density and geometry of the surrounding medium, giving important clues to unveil the nature of the burst progenitor.",

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AU - Lazzati, Davide

AU - Perna, Rosalba

AU - Ghisellini, Gabriele

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Y1 - 2001/8/21

N2 - The recent detection of a transient absorption feature in the X-ray prompt emission of GRB 990705 showed the importance of such observations in the understanding of gamma-ray bursts and their progenitors. We investigate the time dependence of photoionization edges during the prompt emission of bursts in different environments. We show that their variability can be used to infer the density and geometry of the surrounding medium, giving important clues to unveil the nature of the burst progenitor.

AB - The recent detection of a transient absorption feature in the X-ray prompt emission of GRB 990705 showed the importance of such observations in the understanding of gamma-ray bursts and their progenitors. We investigate the time dependence of photoionization edges during the prompt emission of bursts in different environments. We show that their variability can be used to infer the density and geometry of the surrounding medium, giving important clues to unveil the nature of the burst progenitor.

KW - Gamma-rays: bursts

KW - Line: formation

KW - X-rays: general

KW - X-rays: ISM

UR - https://www.scopus.com/pages/publications/0011145453

U2 - 10.1046/j.1365-8711.2001.04735.x

DO - 10.1046/j.1365-8711.2001.04735.x

M3 - Article

AN - SCOPUS:0011145453

SN - 0035-8711

VL - 325

SP - L19-L23

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Time-dependent photoionization opacities in dense gamma-ray burst environments

Abstract

Keywords

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