We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byAiden Bradley
Modified over 3 years ago
Lecture 5: Gamma-Ray Bursts Light extinction:
GRBs are brief flashes of soft -ray radiation ( 100 keV), discovered in the 1970s, the origin of which was not known until 1997 CGRO-BATSE
CGRO spectrum of a GRB
Light curves of GRBs Fluence ~ if cosmological relativistic conditions are implied: Lorentz factor CGRO-BATSE (Fishman & Meegan 1995)
The GRB distribution is isotropic
Bimodal distribution of GRB durations short long Different progenitors: SNe vs binary NS mergers Kulkarni 2000 Duration (s)
Precisione di BATSE 1 grado
1996-2002: The BeppoSAX revolution Wide Field Cameras
Precisione di BATSE 1 grado Precisione delle WFC di BSAX
8 hours3 days GRB970228: first detection of X-ray and optical afterglow 6 months later Costa et al. 1997 Van Paradijs et al. 1997
Firecone model: relativistic shocks in a jet ~ 100 ~ 10
Early Multiwavelength Counterparts (z = 0.937) Bloom et al. 2008 (z = 6.29) (z = 1.6)
Redshift Measurement Djorgovski et al. 1999
Bloom et al. 1998,1999 Host galaxies exhibit emission lines of star formation: [O II], [O III], Balmer and Paschen series
Isotropic irradiated gamma–ray energy vs redshift Long GRB Short GRB
GRB980425 Supernova 1998bw (Type Ic) z = 0.0085
Example of Supernova underlying GRB optical afterglow (z = 0.695) Galama et al. 1999
Light curves of Ic SNe: GRB-SNe, broad-lined SNe, normal SNe
Gamma-Ray Bursts and Supernovae Tsinghua Transient Workshop 8 Nov 2012 Elena Pian INAF-Trieste Astronomical Observatory, Italy & Scuola Normale Superiore.
The Transient Universe: AY 250 Spring 2007 Existing Transient Surveys: High Energy I: Gamma-Ray Bursts Geoff Bower.
Gamma-Ray Bursts. Short (sub-second to minutes) flashes of gamma- rays, for ~ 30 years not associated with any counterparts in other wavelength bands.
Gamma Ray Bursts and LIGO Emelie Harstad University of Oregon HEP Group Meeting Aug 6, 2007.
COSMIC GAMMA-RAY BURSTS The Current Status Kevin Hurley UC Berkeley Space Sciences Laboratory.
E. Pian – LNGS, 13 Sep 2005 Elena Pian - INAF, Trieste Astronomical Observatory, Italy LNGS Summer Institute 2005 GRB: Modern Status.
Gamma-ray Astronomy (The Short Story…). The Big Picture l Whole sky glows l Extreme environments l Probes of the Universe CGRO/EGRET All Sky Map.
Going out with a bang: HSTs continuing contribution to gamma-ray bursts Andrew Levan University of Warwick.
Gamma-ray bursts Tomasz Bulik CAM K, Warsaw. Outline ● Observations: prompt gamma emission, afterglows ● Theoretical modeling ● Current challenges in.
Gamma-Ray Bursts Please press “1” to test your transmitter.
Moriond – 1 st -8 th Feb 2009 – La Thuile, Italy. Page 1 GRB results from the Swift mission Phil Evans, Paul O'Brien and the Swift team.
(Review) K. Ioka (Osaka U.) 1.Short review of GRBs 2.HE from GRB 3.HE from Afterglow 4.Summary.
GRB : a canonical fake short burst L. Caito, M.G. Bernardini, C.L. Bianco, M.G. Dainotti, R. Guida, R. Ruffini. 3 rd Stueckelberg Workshop July 8–18,
Gamma-Ray Bursts Energy problem and beaming * Mergers versus collapsars GRB host galaxies and locations within galaxy Supernova connection Fireball model.
Gamma-ray bursts Discovered in 1968 by Vela spy satellites
L. Piro - ILIAS meeting Gamma-Ray Bursts Luigi Piro Istituto Astrofisica Spaziale Fisica Cosmica - Roma INAF.
Kick of neutron stars as a possible mechanism for gamma-ray bursts Yong-Feng Huang Department of Astronomy, Nanjing University.
Classification of Gamma-Ray Bursts: an observational review Paolo D’Avanzo INAF – Osservatorio Astronomico di Brera.
A burst of new ideas Nature Vol /28 December 2006 徐佩君 HEAR group meeting 12/
BH Astrophys. Ch3.6. Outline 1. Some basic knowledge about GRBs 2. Long Gamma Ray Bursts (LGRBs) - Why so luminous? - What’s the geometry? - The life.
© 2017 SlidePlayer.com Inc. All rights reserved.