Simulating the evolution and emission of relativistic outflows

28 nov. 2019, 09:00 → 29 nov. 2019, 17:30 Europe/Paris

Salle de Conférence du Château

Andreas Zech, Catherine Boisson, Cyril Tasse (GEPI), Hélène Sol (LUTH , OBSPM), Mathieu Servillat, Stefano Gabici (APC), Zakaria Meliani

Relativistic jets and outflows are astrophysical phenomena that occur at very different spatial scales in various sources linked to high-energy emission, such as AGN, GRBs, X-ray binaries and micro-quasars, as well as pulsars. 

The goal of this workshop is to get together experts on the physics of relativistic jets in Galactic and extragalactic objects in France and their associates, to compare our approaches and to reinforce exchanges between the different groups. The workshop will include a few presentations on the currently available observational data and will be primarily focusing on numerical modelling of the evolution of jets and their emission.

This workshop is partly financed by the Centre International d'Ateliers Scientifiques (CIAS) at the Observatoire de Paris. Relativistic jets represent of course a central research topic for the future Cherenkov Telescope Array (CTA) and the workshop has also received partial funding by the Action Fédératrice CTA at the Observatoire de Paris.

 

 

Access to Meudon

jeudi 28 novembre

09:00 → 09:30 Welcome and Coffee

09:00 Welcome and Coffee

09:25 Introduction

Orateur: Andreas Zech

09:30 → 11:00 Particle acceleration in relativistic jets

09:30 Generalised Fermi acceleration

Orateur: Martin Lemoine (Institut d'Astrophysique de Paris, CNRS - Sorbonne U)

Lemoine_ObsPM19.pdf

10:00 PIC / MHD simulations of relativistic shocks

Orateur: Fabien Casse (APC - Université de Paris)

Casse_Atelier_JET_RELT19.pdf

10:30 PIC simulations of magnetic reconnection

Orateur: Benoit Cerutti (IPAG)

bcerutti.pdf

11:00 → 11:30 Coffee break

11:30 → 11:50 Particle acceleration in relativistic jets

11:30 Electromagnetic cascades in Kerr black hole magnetospheres

Orateur: Benjamin Crinquand (IPAG)

Meudon_2019_Crinquand.pdf

11:50 → 12:50 AGN - Observations

11:50 AGN observations with LOFAR

Orateur: Cyril Tasse (GEPI)

LoTSS_JetWorkshop.pdf

12:20 Observations of jets with geodetic VLBI and link to Gaia

Geodetic VLBI is a powerful technique that has been used for 40 years to monitor the Earth’s rotation and realize the terrestrial and celestial reference frames with an unprecedented precision (< 0.1 mas). Recently, it has permitted the construction of the third realization of the International Celestial Reference Frame (ICRF3) which is currently the most precise celestial reference frame. Recently also, Gaia provided an independent astrometric solution whose precision is, for the first time, comparable to VLBI, opening the way to comparisons of positions at various wavelengths. In this talk, I will show the signature of relativistic jets - and more generally of the source structure - in geodetic VLBI observations, and the systematics and offsets between VLBI and Gaia positions.

Orateur: Sébastien Lambert (SYRTE, Observatoire de Paris)

2019_Atelier_LUTh.pdf

12:50 → 14:00 Lunch break

14:00 → 15:25 AGN - Jet models

14:00 Jet modelling in AGN and preparation of simulations.

Orateur: Christophe Sauty

2019 Meudon SAUTY v2.pdf

14:35 GRMHD modelling and radiative transfer

Orateur: Gaëtan Fichet de Clairfontaine (LUTH Observatoire de Paris)

fichetdcg_workshop.pdf

14:55 A jet model for describing the shadows of Sgr A* and M87*

Orateur: Frédéric Vincent

jetmodelsgr.pdf

15:25 → 15:55 AGN - Emission models

15:25 Emission modelling with stratified jets

Orateur: Gilles Henri (IPAG/Observatoire de Grenoble/UGA)

Meudon_2019_GHenri.pdf

15:55 → 16:25 Coffee break

16:25 → 17:15 AGN - Emission models

16:25 Time-dependent modeling of the blazar flares

Orateur: Anton Dmytriiev (LUTH Observatoire de Paris)

Modeling_blazar_flares_workshop_A_Dmytriiev.pdf

16:45 Linking high-energy emission with radio-VLBI jets

Orateur: Olivier Hervet (UCSC)

2019_11_AGN_HE-radio_Meudon_Hervet.pdf

vendredi 29 novembre

09:00 → 09:30 Welcome and Coffee

09:30 → 10:00 AGN - Emission models

09:30 Hadronic emission modelling and multi-messengers

Orateur: Dr Matteo Cerruti (Institut de Ciències del Cosmos - Universitat de Barcelona (ICCUB))

Cerruti_Meudon.pdf

10:00 → 10:30 GRB - Observations

10:00 GRB Observations : MWL

Orateur: Susanna Vergani (GEPI)

jet.key

10:30 → 11:00 GRB - Emission models

10:30 Internal shock scenario for GRBs

Orateur: Frédéric Daigne (Institut d'Astrophysique de Paris - Sorbonne Université)

20191128-daigne.pdf

11:00 → 11:30 Coffee break

11:30 → 12:20 GRB - Emission models

11:30 Emission modelling at very high energies

Orateur: Zeljka Bosnjak (FER - University of Zagreb, Croatia)

bosnjak_paris.pdf

12:00 Relativistic ejections from binary neutron star mergers.

Orateur: Raphaël Duque (Institut d'Astrophysique de Paris)

Duque_12h00_red.pdf

12:20 → 12:50 X-ray/gamma-ray binaries - Observations

12:20 XRB Observations: high energies

Orateur: Guillaume Dubus (IPAG)

GDMeudon.pdf

12:50 → 14:00 Lunch break

14:00 → 15:20 X-ray/gamma-ray binaries - jet and emission models

14:00 The iInternal shock model applied to X-ray binaries.

Orateur: Julien Malzac (IRAP (CNRS/Université de Toulouse/CNES))

malzac_jet_meudon.pdf

14:30 An Accretion-Ejection Paradigm for Compact Objects

Orateur: Pierre-Olivier Petrucci (IPAG)

Talk_popetrucci.pdf

15:00 Dynamical effects of radiative losses in high-mass microquasars

Orateur: Arthur Charlet (CRAL, LUPM)

Charlet_Meudon20191129.pdf

15:20 → 15:50 Coffee break

15:50 → 16:30 Conclusions