S19
At the Galactic center
Communauté
Contact : maica.clavel@univ-grenoble-alpes.fr
Located at about 8 kpc from the Sun, the centre of our Galaxy is an excellent laboratory to study the complex processes occurring at the heart of galaxies with unequalled spatial resolution. It is a unique object of study, which concentrates a large number of interdependent research subjects. The Galactic Centre is in fact a very rich region where the supermassive black hole Sagittarius A*, numerous compact objects, stellar populations including several star clusters, molecular clouds and ionised gas, possibly intense magnetic fields, as well as extreme phenomena and, perhaps, dark matter, all come together. Numerous results on the Galactic centre have been published in recent years, shedding new light on the energetic events taking place at the Galactic centre. Nevertheless, the 3D structure, dynamics and interactions between these different components, which are essential for interpreting the observations, are still poorly understood.
The aim of this workshop is therefore to bring together the community interested in this region or in processes taking place in it, in order to discuss the latest advances, possible links between their work and to encourage new collaborations. The proposed themes therefore include all scales, all wavelengths and all methods of analysis, whether observations, theoretical modelling or numerical simulations, and aim to cover all the objects and structures present in the Galactic centre or emanating from this region.
Topics:
- Sagittarius A*
- Interstellar medium
- Magnetic field
- Stellar formation and populations
- Dynamical modelling
- High-energy processes
- Plasma physics
- General relativity
- Dark matter
- Feedback and large-scale interactions
- Activity cycles in relation to other galactic nuclei
This workshop covers themes that are present in various Actions Thématiques (AT-PEM, CG, PCMI, PS). It will provide an opportunity for these communities to meet and discuss their observations, results and methods of analysis. The proposed workshop will also provide a comprehensive overview of our current knowledge of the Galactic centre for those who are not already familiar with this complex region.
SOC: Maïca Clavel, Katia Ferrière, Arianna Foschi, Anne-Laure Melchior, Pierre-Olivier Petrucci
Information to the Speakers
All talks should be in English and accessible to a wide range of expertises.
Invited talks: 20min +5min for questions
Contributed talks: 15min +5min for questions
Flash talks: 5min
Schedule
Session S19 will take place on Tuesday July 1st
14h00-15h55 The supermassive black hole Sgr A* and its close surroundings
16h25-18h30 The Central Molecular Zone and connections with larger scales
| Time | Speaker | Title |
|---|---|---|
| 14h00 | Thibaut Paumard (invited) | GRAVITY and the Galactic center |
| 14h25 | Nicolas Aimar (contributed) | Detecting non-Kerr signature in Sgr A* flares with current and future instruments |
| 14h45 | Arianna Foschi (contributed) | On the presence of a fifth force at the Galactic Center |
| 15h05 | Enzo Figueiredo (contributed) | Kinetic Simulations of Flaring Activity in a Black Hole Magnetosphere |
| 15h25 | Maxime Parra (contributed) | A XRISM snapshot of the Galactic Center: Everyone is here! |
| 15h45 | Noa Grollimund (flash) | MAXI J1744-294: a new microquasar at the galactic center? |
| 15h50 | Nicolas Scepi (flash) | X-ray Flaring at the Galactic Center: Insights from GRMHD and PIC simulations |
| 15h55 | Break | |
| 16h25 | Francesca Calore (invited) | Dark matter and pulsars at the Galactic centre: innate similarities disentangled through a multiwavelength approach |
| 16h50 | Robbie Webbe (contributed) | X-ray Variability-Selected Sources in the Galactic Plane |
| 17h10 | Frédéric Marin (contributed) | X-ray Polarimetry of the Galactic Center: Tracing Past Flares and Magnetic Structures with IXPE |
| 17h30 | Pierre Dumond (contributed) | A consistent explanation for the unusual initial mass function and star formation rate in the Central Molecular Zone |
| 17h50 | Anne Lemière (contributed) | Particle acceleration at the Galactic Center: what does reveal the deep observation of very high energy emission in the Central Molecular Zone with H.E.S.S.? |
| 18h10 | Tristan Boin (contributed) | The interplay between galactic bar/bulges & nuclear stellar discs/clusters in Milky Way-like galaxy simulations |
Présentations
| Authors | Title | Type | File |
|---|---|---|---|
| Maxime Parra | A XRISM snapshot of the galactic center: Everyone is here ! | orale | SF2A_Abstract.pdf |
| Enzo Figueiredo, Benoît Cerutti, Kyle Parfrey | Kinetic Simulations of Flaring Activity in a Black Hole Magnetosphere | orale | Abstract_3.pdf |
| Frédéric Marin | X-ray Polarimetry of the Galactic Center: Tracing Past Flares and Magnetic Structures with IXPE | orale | Abstract_5.pdf |
| Pierre Dumond, Gilles Chabrier | A consistent explanation for the unusual initial mass function and star formation rate in the Central Molecular Zone | orale | Abstract_Dumond.pdf |
| Nicolas Aimar, Joao Luis Rosa, and Hanna Liis Tamm | Detecting non-Kerr signature in Sgr A* flares with current and future instruments | orale | 599911.pdf |
| Anne Lemière, Justine Devin, Régis Terrier, pour la collaboration H.E.S.S.. | Accélération de particules au Centre Galactique : que nous révèle l\\\'observation profonde de l’émission de très haute énergie dans la Zone Moléculaire Centrale avec H.E.S.S. | orale | Abstract_CMZ_HESS_2025.pdf |
| Arianna Foschi | On the presence of a fifth force at the Galactic Center | orale | abstract_6.pdf |
| Tristan Boin, Paola Di Matteo, Sergey Khoperskov, Françoise Combes, Misha Haywood, Nils Ryde, Mathias Schultheis | The interplay between galactic bar/bulges & nuclear stellar discs/clusters in Milky Way-like galaxy simulations | orale | SF2A_NSC.pdf |
| Robbie Webbe, Natalie Webb, Erwan Quintin | X-ray Variability-Selected Sources in the Galactic Plane | orale | S19 - X-ray Variability-Selected Sources in the Galactic Plane.pdf |
| Noa Grollimund, Stéphane Corbel, Francesco Carotenuto, Thomas Russell, Tasso Tzioumis, Rob Fender, Sara Motta | MAXI J1744-294: a new microquasar at the galactic center? | orale | SF2A_Grollimund_MAXIJ1744.pdf |
| Karine Perraut | Les régions d’interaction étoile-disque des objets stellaires jeunes sondées avec l’interféromètre VLTI/GRAVITY | invite | résumé.pdf |
| N. Scepi, J. Dexter & M.C. Begelman | X-ray Flaring at the Galactic Center: Insights from GRMHD and PIC simulations | orale | Scepi_et_al_S19.pdf |
| Francesca Calore | Dark matter and pulsars at the Galactic centre: innate similarities disentangled through a multiwavelength approach | invite | SF2A_GC_abstract_FCalore.pdf |