Diffuse Synchrotron Emission in Clusters of Galaxies - What's Next?

23 Oct 2017, 09:30 → 27 Oct 2017, 13:45 Europe/Amsterdam

Hortus Botanicus, Leiden

Thanks to the radio data provided by new instruments, such as LOFAR, we expect to fully understand non-thermal phenomena in clusters. However, recent observations revealed details on the non-thermal component that cannot be explained by the previously thought mechanisms. There are several open questions that this field needs to tackle to bring our understanding to a deeper level. The main goal of this workshop is to bring together the community working on non-thermal emission in clusters from different angles – theory, simulations and observations – in order to unveil the origin of this emission and its connection with the structure formation process. We plan for a workshop with about 60 participants, with several invited talks, some slots for contributed talks, and guided discussion sessions well prepared in advance by the SOC in collaboration with the invited experts to tackle relevant questions.

Programme

Monday, 23 October

09:30 → 10:00 Registration & Coffee

10:00 → 12:30 Monday Morning

Convener: Prof. Julie Hlavacek-Larrondo (Université de Montréal)

10:00 Welcome & Introduction

Speaker: Fabio Zandanel (University of Amsterdam)

SOC_intro.pdf

SOC_intro.pdf

SOC_intro.pptx

10:10 Observations of radio halos, mini-halos and relics

Speaker: Tiziana Venturi

Venturi-Leiden17-Final.pdf

10:55 LOFAR observations of clusters of galaxies

Speaker: Dr Tim Shimwell (Leiden University)

shimwell-talk.pdf

11:20 Early results from SKA pathfinders

Speaker: Melanie Johnston-Hollitt

Melanie_Leiden_October17.pdf

11:45 Exploring the diffuse emission from clusters of galaxies with MSSS

Speaker: Emanuela Orru (ASTRON)

Leiden_orru.pdf

12:05 Observatons of radio relics

Speaker: Dr Reinout van Weeren (Harvard-Smisthonian Center for Astrophysics)

LeidenHB_Oct2017vanWeeren.pdf

12:30 → 13:45 Lunch

13:45 → 15:15 Monday Afternoon: I

Convener: Prof. Marcus Brüggen

13:45 High-energy observations of clusters

Speaker: Stephan Zimmer (Universite de Geneve (CH))

leiden_clusterObs_web.pdf

14:30 Particle acceleration in clusters

Speaker: Tom Jones

twj-leiden17-mod.pdf

15:15 → 15:35 Coffee Break

15:35 → 16:40 Monday Afternoon: II

Convener: Prof. Marcus Brüggen

15:35 Properties of Merger-Driven Shocks in Galaxy Clusters

Speaker: Dongsu Ryu (UNIST)

leiden-17-1.pdf

leiden-17-1.pptx

16:00 LOFAR view of the Sausage cluster

Speaker: Duy Hoang (Leiden University)

Sausage_LOFAR_GM2017_Duy.pdf

16:20 LOFAR discovery of a double radio halo in Abell 1758

Speaker: Mr Andrea Botteon (INAF-IRA)

diffuse_botteon.pdf

16:40 → 17:00 Discussion Session

Convener: Prof. Marcus Brüggen

Tuesday, 24 October

09:00 → 10:30 Tuesday Morning: I

Convener: Dr Huib Intema (Leiden)

09:00 Cosmological simulations of clusters

Speaker: Christoph Pfrommer

Pfrommer_Leiden_Clusters17.pdf

09:45 A Lagrangian view on the gamma-ray and diffuse radio emission in galaxy clusters

Speaker: Denis Wittor (Universität Hamburg)

Wittor_animation.pdf

Wittor_no_animation.pdf

10:05 Origin of magnetic fields in clusters

Speaker: Prof. Marcus Brüggen

Leiden2017.pdf

10:30 → 10:50 Coffee Break

10:50 → 12:30 Tuesday Morning: II

Convener: Dr Huib Intema (Leiden)

10:50 Observations of magnetic fields in clusters

Speaker: Federica Govoni

Govoni.pdf

11:15 Magnetic fields measurements in cluster

Speaker: Valentina Vacca (Max Planck for Astrophysics)

Vacca_leiden_new.pdf

11:40 Deep JVLA observations of the Toothbrush galaxy cluster

Speaker: Ms Kamlesh Rajpurohit (Thüringer Landessternwarte Tautenburg)

Leiden_meeting.pdf

12:00 Cluster magnetic fields: the rest of the story

Speaker: Larry Rudnick

LR_RestofStory_v24Oct.pdf

LR_RestofStory_v24Oct.pptx

12:30 → 13:45 Lunch

13:45 → 15:10 Tuesday Afternoon: I

Convener: Daniele Dallacasa

13:45 Galaxy clusters at ultra low-frequencies

Speaker: francesco de Gasperin (Leiden University)

2017.10_ClusterLowFreq-Leiden.pdf

14:10 Deep in the (un)known: the Sausage Cluster

Speaker: Gabriella Di Gennaro

DiGennaro_SausageCluster_24-10-2017.pdf

14:30 Simulations of the Sausage Cluster

Speaker: Julius Donnert (University of Minnesota)

Donnert-Simulation_of_the_Sausage_Cluster.pdf

14:50 Magnetic fields properties derived from radio relics

Speaker: Dr Matthias Hoeft (Thüringer Landessternwarte)

magfieldsfromrelics.pdf

15:10 → 15:30 Coffee Break

15:30 → 17:00 Magnetic Fields & Polarization Discussion Session

Conveners: Federica Govoni, Gianfranco Brunetti (INAF)

15:30 Introductory Talk on Magnetic Fields & Polarization

Speakers: Dr Annalisa Bonafede, Dongsu Ryu (UNIST)

Leiden17_Annalisa.pdf

16:00 Guided Discussion Session on Magnetic Fields & Polarization

Wednesday, 25 October

09:00 → 10:35 Wednesday Morning: I

Convener: Emma Storm (GRAPPA, University of Amsterdam)

09:00 Observations of galaxy clusters in X-rays

Speaker: Maxim Markevitch

markevitch_leiden17.pdf

09:45 X-ray observations of cluster shocks

Speaker: Hiroki Akamatsu

HAkamatsu_Leiden_20171025.pdf

10:10 SZ observations of clusters shocks

Speaker: Kaustuv Basu (University of Bonn)

KBasu_SZshock.pdf

10:35 → 11:00 Coffee Break

11:00 → 12:30 Wednesday Morning: II

Convener: Emma Storm (GRAPPA, University of Amsterdam)

11:00 Cluster population studies

Speaker: Rossella Cassano

cassano_Leiden17_NEW.pdf

11:25 Study of non-merging massive clusters at low frequency

Speaker: Federica Savini

11:45 Ultra-steep spectrum radio relics in clusters

Speaker: Tracy Clarke

Clarke_Leiden.pdf

12:10 Ultra Steep Spectrum Sources in Galaxy Clusters

Speaker: Soumyajit Mandal

Mandal-Leiden-October-2017.pdf

12:30 → 13:45 Lunch

13:45 → 15:15 Wednesday Afternoon: I

Convener: Julius Donnert (University of Minnesota)

13:45 Particle acceleration in collisionless shocks

Speaker: Anatoly Spitkovsky

Leiden_clusters_2017_AS.pdf

14:30 Electron acceleration at quasi-perpendicular shocks

Speaker: Lorenzo Sironi

leiden_17.pdf

14:55 Cosmic Ray acceleration in clusters updated

Speaker: Walter Jaffe

Jaffe_mhdshockb.pdf

15:15 → 15:35 Coffee Break

15:35 → 16:25 Wednesday Afternoon: II

Convener: Julius Donnert (University of Minnesota)

15:35 Diffusive Shock Acceleration Model with Postshock Turbulence for Radio Relics

Speaker: Hyesung Kang

Kang_Leiden2017.pdf

16:00 Turbulent acceleration and magnetic field amplification in galaxy clusters

Speaker: Peng Oh

peng_oh_talk.pdf

16:25 → 17:00 Discussion Session

Convener: Julius Donnert (University of Minnesota)

19:00 → 21:30 Social Dinner: Restaurant Buddhas

Thursday, 26 October

09:00 → 10:25 Thursday Morning: I

Convener: Craig Sarazin

09:00 Cool-core clusters: thermal - non-thermal connection

Speaker: Simona Giacintucci

leiden_giacintucci.pdf

09:25 Radio mode feedback: theory and simulations

Speaker: Manel Perucho

Perucho.pdf

09:45 Statistical study of radio halos in a mass-selected sample of galaxy clusters

Speaker: Virginia Cuciti (National Institute for Astrophysics - INAF)

Cuciti_Leiden.pdf

10:05 Results from a radio halo search in high-mass SZE selected clusters

Speaker: Dr Martin Sommer (Argelander-Institut fuer Astronomie)

sommer.pdf

10:25 → 10:45 Coffee Break

10:45 → 12:25 Thursday Morning: II

Convener: Craig Sarazin

10:45 Cosmic-ray heating and mini-halos

Speaker: Svenja Jacob

Jacobs_presentation_Leiden2017.pdf

11:10 State-of-the-art JVLA observations of clusters of galaxies: revealing new physics about the non-thermal particles

Speaker: Prof. Julie Hlavacek-Larrondo (Université de Montréal)

JHL_LEIDEN2017.pdf

11:30 Inverse-Compton hard X-ray emission from clusters: NuStar

Speaker: Daniel Wik

Wik_Leiden2017.pdf

11:55 Indirect turbulence measurements in galaxy clusters with Hitomi and Chandra

Speaker: Irina Zhuravleva

Zhuravleva_leiden17.pdf

12:25 → 13:45 Lunch

13:45 → 15:05 Thursday Afternoon: I

Convener: Andra Stroe

13:45 X-ray study of the merging double-radio-relic cluster Abell 3376 with Suzaku

Speaker: Igone Urdampilleta (SRON)

A3376_Leiden_IUrdampilleta.pdf

14:05 An ABC estimate of the CR electron content in galaxy clusters through radio relics

Speaker: Jakob Gelszinnis (Thüringer Landessterwarte, Tautenburg)

2017_Talk_Leiden_JG.pdf

14:25 The Corona Borealis supercluster seen with LOFAR

Speaker: Dr Alexander Drabent (TLS Tautenburg)

talk_26102017.pdf

14:45 A combined JVLA and Chandra study of the “Kite” radio source in Abell 2626

Speaker: Alessandro Ignesti

presentazione_leiden_ignesti.pdf

15:05 → 15:25 Coffee Break

15:25 → 17:00 Theroy VS Observations Discussion Session

Conveners: Dr Annalisa Bonafede, Dr Matthias Hoeft (Thüringer Landessternwarte)

15:25 Introductory Talk on Theory VS Observations

Speaker: Gianfranco Brunetti (INAF)

Brunetti_Leiden2017.pdf

15:55 Guided Discussion Session on Theory VS Observations

Friday, 27 October

09:00 → 10:30 Friday Morning: I

Convener: Christoph Pfrommer

09:00 Merging clusters and star-formation

Speaker: Andra Stroe

Stroe_Diffuse.pdf

09:25 On the connection between turbulent motions and particle acceleration in galaxy clusters

Speaker: Stephan Zimmer (Universite de Geneve (CH))

leiden_turbulence.pdf

09:45 Cosmic radio background and its discovery potential

Speaker: Tessa Vernstrom

vernstrom_tessa_leiden_talk.pdf

10:10 FR-type radio sources in COSMOS: relation to the large-scale environment

Speaker: Eleni Vardoulaki (Argelander-Institut für Astronomie, Bonn)

Vardoulaki_E_Leiden17.pdf

10:30 → 10:50 Coffee Break

10:50 → 12:30 Friday Morning: II

Convener: Christoph Pfrommer

10:50 Dark matter in clusters and radio observations

Speaker: Emma Storm (GRAPPA, University of Amsterdam)

Storm_Clusters2017.pdf

11:15 A Weak-lensing Analysis of the Synchrotron Rich, Double Radio Relic Galaxy Cluster, PLCK G287.0+32.9

Speaker: Kyle Finner (Yonsei University)

Finner_leiden_synchrotron_kfinner.pdf

11:35 Concluding Talk

Speaker: Craig Sarazin

Sarazin_Leiden.pdf

Sarazin_Leiden.pptx

12:10 Concluding Remarks

Speaker: Fabio Zandanel (University of Amsterdam)

12:20 Summary of summaries (courtesy of on-line follower Franco Vazza)

summaries_leiden.pdf

12:30 → 13:45 Lunch: Goodbye