GCOS Workshop May 2021

17 May 2021, 00:00 → 21 May 2021, 23:59 Europe/Brussels

zoom

Jörg Hörandel (Radboud University Nijmegen dep. Astrophysics)

Zoom link:

https://zoom.us/j/92129939901?pwd=UDEwcGRNYkkwdDRMTG02Znk3Um4yUT09

Meeting-ID: 921 2993 9901
Password: 852037

---

Understanding the physics and finding the origin of ultra-high energy particles in the Universe are among the hottest topics in astroparticle physics. The two leading ultra-high-energy cosmic-ray (UHECR) experiments, the Telescope Array experiment in Utah (US) and the Pierre Auger Observatory in the Mendoza province (Argentina), are ground arrays providing a complementary view of the UHECR sky and are expected to take data into early in the next decade. They are expected to provide at least partial answers to the UHECR puzzle.

Beyond 2030, many questions will remain open and it is presently unclear how the study of ultra-high-energy particles should continue. One option may be the Global Cosmic Ray Observatory (GCOS), a very large ground observatory likely hosted at multiple sites with a combined exposure an order of magnitude larger than Auger+TA and sensitivity also to UHE photons and neutrinos. GCOS will be expected to play a major role in multi-messenger astrophysics in the decades to come.

We would like to invite you to a brainstorming workshop to discuss the physics case and possible technical implementations of GCOS.

The workshop will be held by zoom from May 17th to 21st, 2021. Please save the date, more details will follow.

We are working presently on a detailed workshop program and aim to include discussions on:
• theoretical and experimental advances in the last decade 
• expected open science questions to be addressed after 2030
• GCOS science case
• possible implementations of GCOS

Main objective of the workshop is to brainstorm the physics case and possible technological implementations of GCOS. We invite you to submit an abstract for a contribution on one of the two topics:
Physics case: theoretical aspects, cosmic rays, neutrinos, gamma rays, multi messenger, fundamental physics, dark matter, ...
Technological implementation: detector concepts, prototype studies, ...

If you are interested to receive more information on GCOS and the workshop, please sign up to our mailing list (see Menue on the left).
 

Organizers: Rafael Alves Batista, Antonella Castellina, Ralph Engel, Toshihiro Fujii, Jörg R. Hörandel (chair), Charles Jui, Lu Lu, Ioana Maris, Shoichi Ogio, Takashi Sako, Fred Sarazin.

 

Monday, 17 May

Lessons learned until 2030 - existing experiments

Convener: Jörg Hörandel

1 Opening - scope of workshop

Speaker: Jörg Hörandel

intro.pdf

2 TA and TAx4 experiment summary. Status and results.

Speakers: Eiji Kido, Eiji Kido (RIKEN Cluster for Pioneering Research)

GCOS_ekido_open.pdf

3 TA anisotropy results and interpretations

Speakers: Jihyun Kim, Jihyun Kim (University of Utah)

20210517-GCOS-JihyunKim.pdf

14:50 discussion

4 Auger(Prime) charged CRs, neutrinos, gamma rays

Speaker: Ralph Engel

Auger-GCOS-Engel-2021.pdf

15:30 discussion

5 UHE Universe in the multimessenger paradigm - lessons from neutrinos

Speaker: Markus Ahlers

Ahlers_GCOS2021.pdf

16:10 discussion

Theory/models

Convener: Rafael Alves Batista

6 UHE acceleration, status theoretical understanding, open questions what observations does theory need from GCOS in order to move on?

Speaker: Kohta Murase

GCOS2021.pdf

16:50 discussion

7 Source model scenarios - starburst galaxies vs AGNs

Speaker: Ke Fang

GCOS_Fang.pdf

17:20 discussion

8 Magnetic fields and directional correlations of UHECRs with local galaxies

Speakers: Arjen van Vliet, Arjen van Vliet (DESY Zeuthen)

20210517_StarburstCorrelation_ArjenVanVliet.pdf

17:50 discussion

9 Relevance of photo-nuclear processes in UHECR interactions

Speaker: Denise Boncioli

Boncioli_GCOS_2021.pdf

18:20 discussion

10 audio/video recording from Monday sessions

zoom_0.mp4

Tuesday, 18 May

Magnetic fields and impact on cosmic rays

Convener: Antonella Castellina

11 galactic and extragalactic magnetic fields and their relation to UHECR propagation

Speaker: Marijke Haverkorn

haverkorn_GMF_GCOS2021.pdf

14:20 discussion

12 deflection of charged particles in B fields (--> particle astronomy?)

Speaker: Michael Unger

unger-deflections.pdf

14:50 discussion

13 influence of distribution of local matter density in Universe on arrival directions

Speaker: Glennys Farrar

GCOS_051821-farrar.pdf

15:20 discussion

14 astronomy with charged particles, nu and GW

Speaker: Paolo Lipari

lipari_gcos.pdf

15:50 discussion

Multi-disciplinary science

Convener: Ioana Maris

15 Transient Luminous Events

Speaker: Roberta Colalillo

GCOS_colalilllo_2021_05_18.pdf

16:45 discussion

16 TA, TGFs correlated with a signal in the SD

Speaker: Rasha Abbasi

Rabbasi_GCOS2021.pdf

17:05 discussion

17 (hadronic) interactions at highest energies, including synergies with LHC p-O

Speaker: Tanguy Pierog

had_inter_pierog.pdf

17:25 discussion

18 test of hadronic interaction models with TeV-PeV muons, IceCube-IceTop

Speaker: Dennis Soldin

GCOS_dsoldin.pdf

17:45 discussion

19 uh-DM annihilation

Speaker: Olivier Deligny

deligny-slides.pdf

18:05 discussion

20 Lorentz invariacne

Speaker: Günter Sigl

LIV.pdf

18:25 discussion

21 audio/video recording from Tuesday sessions

zoom_0.mp4

Wednesday, 19 May

Discussion UHE physics case

Convener: Rafael Alves Batista

Experimental techniques - R&D

Convener: Takashi Sako

22 physics case of space observatories (POEMMA, …)

Speaker: Angela Olinto

GCOS_Olinto_POEMMAoverview_19may21.pdf

15:20 discussion

23 GRAND

Speaker: Kumiko Kotera

21_05_19_GCOS_kotera-compressed.pdf

15:50 discussion

Experimental techniques - R&D

Convener: Shoichi Ogio

24 Fluorescence - FAST

Speaker: Toshihiro Fujii (Kyoto University)

210519_FAST_GCOS_Fujii.pdf

16:50 discussion

25 Segmented tanks

Speaker: Ioana Maris

IoanaMaris_Segmented.pdf

17:20 discussion

26 (Auger) Radio technique

Speaker: Tim Huege

huege-gcos-v3.pdf

17:50 discussion

27 Discussion in Japan about future plans for UHECR ground observations

Speaker: Yoshiki Tsunesada

18:20 discussion

28 audio/video recording from Wednesday sessions

audio_only_1.m4a

Thursday, 20 May

Multi-messenger experimental techniques 2030+

Convener: Lu Lu

29 IceCube Gen2 - The optical extension

Speaker: Tianlu Yuan

gen2optical.pdf

14:20 discussion

30 - The radio extension

Speaker: Alan Coleman

Coleman-GCOS-RadioGen2.pdf

14:50 discussion

31 radar technique

Speaker: Krijn de Vries

Radar_GCOS_KdV.pdf

15:20 discussion

32 The optimal declinations of a pair of SD arrays for full-sky studies

Speaker: Armando di Matteo

slides-20210520-Armando.pdf

15:45 discussion

Discussion/Brainstorming

Conveners: Ioana Maris, Toshihiro Fujii

33 Discussion: Ground array vs space observatories

34 Discussion: What can we hope to learn from GCOS?

Discussion/Brainstorming

Convener: Jörg Hörandel

35 Discussion: next steps, .. WhitePaper, .. follow-up workshop, ...

Speaker: Jörg Hörandel

next.pdf

36 Organize GCOS presentation at ICRC (12’ video + proceedings paper)

Speaker: Jörg Hörandel

icrc.pdf