Three elephants in the gamma-ray sky: Loop I, the Fermi bubbles, and the Galactic center excess

21 Oct 2017, 13:00 → 24 Oct 2017, 13:00 Europe/Zurich

Garmisch-Partenkirchen

Fermi bubbles, Galactic center excess, and Loop I are bright extended sources of gamma rays. In spite of a significant effort to explain the origin of these objects, many questions remain unresolved.
The purpose of the meeting is to review recent studies of the Fermi bubbles, the GC excess, and the Loop I, to discuss the theoretical modeling, and to overview how future observations and new instruments, such as CTA, eROSITA, SKA, will help us to uncover the origin of the three elephants in the gamma-ray sky.

Location 
The workshop will be in a conference room in Atlas Posthotel, Marienplatz 12, Garmisch-Partenkirchen.

Organizers
Stefan Funk
Dmitry Malyshev
Philipp Mertsch
Christoph Weniger

Organized with a financial support from
ECAP (Erlangen)
RWTH (Aachen)
GRAPPA (Amsterdam)

List of participants
Richard Bartels
Benjamin Buckman
Francesca Calore
Eric Charles
Ilias Cholis
Roland Crocker
Julia Deneva
Clive Dickinson
Torsten Ensslin
Carmelo Evoli
Douglas Finkbeiner
Iris Gebauer
Ilya Gurwich
Luc Hendriks
Markus Holler
Xiaoyuan Huang
Yoshiyuki Inoue
Gudlaugur Johannesson
Uri Keshet
Ralf Kissmann
Tim Linden
Hao Liu
Steven Longmore
Naomi McClure-Griffiths
Elena Orlando
Fiona Panther
Christoph Pfrommer
Olaf Reimer
Michael Schulreich
Yuri Shchekinov
Tracy Slatyer
Emma Storm
Andrea Vittino
Karen Yang
Gabrijela Zaharijas

Saturday, 21 October

13:00 → 14:00 Registration

14:00 → 16:00 Session: Observations of Galactic center, Fermi bubbles, Loop I

14:00 GC excess overview

Speaker: Francesca Calore

ThreeElephants_Workshop_2017.pdf

14:40 Fermi bubbles overview

Speaker: Tracy Slatyer (Harvard University)

Fermi_Bubbles_Review.pdf

15:20 Loop I overview

Speaker: Yuri Shchekinov

YuS_NPS_Loop_21.10.17.pdf

16:00 → 18:00 Welcome banquet

Sunday, 22 October

09:00 → 10:20 Session: Galactic center

09:00 Star formation near the Galactic center overview

Speaker: Steven Longmore

Longmore_3elephants_meeting_22oct17_web.pdf

09:40 Molecular clouds

Speaker: Iris Gebauer (Universitaet Karlsruhe)

IG_3Elephants_2017.pdf

10:00 511 keV line

Speaker: Fiona Helen Panther (Australian National University)

511keVGarmisch.pdf

10:20 → 11:00 Coffee break

11:00 → 12:20 Session: Propagation in the Galaxy

11:00 Cosmic rays and Galactic winds

Speaker: Christoph Pfrommer (Potsdam)

Pfrommer_workshop_Garmisch17.pdf

11:20 Simulation of Galactic propagation

Speaker: Ralf Kissmann (University Innsbruck)

TalkThrEle2017RK.pdf

11:40 Non-linear cosmic ray transport

Speaker: Dr Carmelo Evoli (Gran Sasso Science Institute)

Evoli_garmisch_2017.pdf

12:00 SkyFACT

Speaker: Emma Storm (GRAPPA, University of Amsterdam)

Storm_GarmischWkshp.pdf

12:20 → 14:00 Lunch

14:00 → 15:20 Session: Observations of FB and Loop I

14:00 X-ray observations of the Fermi bubbles overview

Speaker: Dr Yoshiyuki Inoue (ISAS/JAXA)

yinoue_171022_FB.pdf

14:40 Overview of large-scale features in the radio sky

Speaker: Clive Dickinson (The University of Manchester)

Dickinson_RadioSky_Oct2017.pdf

15:20 → 16:00 Coffee break

16:00 → 17:20 Session: Loop I modeling and distance measurements

16:00 Dust reddening and distance to gas

Speaker: Douglas Finkbeiner (Harvard University)

16:20 Loops and superbubbles in H I

Speaker: Naomi McClure-Griffiths (Australian National University)

HI_Elephants_McClure-Griffiths.pdf

16:40 Microwave haze

Speaker: Liu Hao

presentation_Hao.pdf

19:00 → 21:00 Session: Dinner

Monday, 23 October

09:00 → 10:00 Session: Modeling of FB and Loop I

09:00 Simulations of Fermi bubbles overview

Speaker: Hsiang-Yi Karen Yang

FBWorkshop2017.pdf

FBWorkshop2017.pptx

09:40 Reconstructing the origin of the Local Bubble and Loop I via radioisotopic signatures on Earth

Speaker: Dr Michael Schulreich

schulreich_Garmisch2017.pdf

10:00 → 10:40 Coffee break

10:40 → 11:40 Session: Galactic propagation, leptonic models of GC excess

10:40 GC excess and interstellar radiation near the GC

Speaker: Gudlaugur Johannesson

3DISM_slides.pdf

11:00 CR transport and anisotropic diffusion

Speaker: Andrea Vittino (TU Munich)

Vittino_3elephants.pdf

11:20 Diffuse modeling and GC excess

Speaker: Tim Linden (U)

11:40 → 13:40 Lunch break

13:40 → 15:20 Session: Statistical methods

13:40 X-shaped bulge

Speaker: Roland Crocker (Australian National University)

Crocker three elephants 2017.pdf

14:00 D3PO

Speaker: Torsten Ensslin (MPI f. Astrophysics)

14:20 The morphology of the GeV excess revisited

Speaker: Richard Bartels (University of Amsterdam)

Bartels_Garmisch.pdf

14:40 Wavelet analysis of the Inner Galaxy

Speaker: Ilias Cholis (Fermi National Accelerator Laboratory)

Wavelets_IC.pdf

15:00 Spectral analysis of GC excess

Speaker: Xiaoyuan Huang

Xiaoyuan_GeV_d3po_GP.pdf

15:20 → 16:00 Coffee break

16:00 → 17:40 Session: Multi-wavelength, multi-messanger studies of the Galaxy

16:00 Diffuse emission with HESS / CTA

Speaker: Markus Holler (LLR - Ecole Polytechnique)

10_23_Holler_ThreeElephantsWS_Diffuse.pdf

16:20 Cosmic rays and interstellar emissions from radio to gamma rays

Speaker: Elena Orlando (Stanford University)

3elephants_orlando.pdf

16:40 Fermi bubbles: X-ray and gamma-ray evidence for a supersonically expanding shell

Speaker: Uri Keshet (Ben-Gurion University of the Negev)

FermiBubbles_3Lfnts.pdf

17:00 Our Galaxy dominates the high-energy neutrino sky

Speaker: Ilya Gurwich (NRCN)

Galactic IC - flat.pdf

Galactic IC.pptx

Tuesday, 24 October

09:00 → 10:40 Session: GC excess and millisecond pulsars

09:00 MSP interpretation of the gamma-ray signal in M31

Speaker: Gabrijela Zaharijas (University of Nova Gorica)

2017-10-ThreeElephants-Zaharijas-v3.pdf

09:20 Radio Searches for Pulsars in the Galactic Center

Speaker: Julia Deneva

20171024-gc-new.pdf

10:00 Characterizing the Population of Gamma-Ray Pulsars in the Galactic Bulge

Speaker: Eric Charles (SLAC National Accelerator Laboratory (US))

TriplePachyderm_Charles_PSR_Final.pdf

10:20 Neural network analysis of GC excess

Speaker: Luc Hendriks (Nikhef)

luchendriks-deeplearning.pdf

10:40 → 11:20 Coffee break

11:20 → 12:20 Session: Discussions