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AstroParticle Symposium 2022

31 octobre 2022 à 25 novembre 2022
Institut Pascal
Fuseau horaire Europe/Paris

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Liste des contributions

88 / 88
52. Discussion (Inflation, preheating, reheating : codes and signature(s)?)
Jong Hyun Yoon, Marcos Garcia
31/10/2022 15:00
49. Welcoming address
Mme Tiina Suomijärvi (P2I - Graduate School of Physics)
02/11/2022 09:30
50. The Pascal Institute
M. Yves Balkanski
02/11/2022 09:45
1. Gravitational portal at the end of inflation
Simon Clery
02/11/2022 10:00
13. Dark matter production during preheating
Jong Hyun Yoon
02/11/2022 10:20
14. Searching for supersymmetric LLPs
Donald Kpatcha
02/11/2022 10:40
15. Primordial Black Holes from Dissipation During Inflation
Marcos Garcia
02/11/2022 11:00
16. Non-perturbative gravitational production of vector Dark Matter
Mlle Anna Socha
02/11/2022 11:40
17. Dark matter from the primordial plasma: from freeze-in to pandemic production
M. Torsten Bringmann
02/11/2022 12:00
18. Observational signatures of compact dark stars
M. Alejandro Ibara
02/11/2022 12:20
28. Boltzmann or Bogoliubov? A Case of Gravitational Particle Production
M. Kunio Kaneta
02/11/2022 12:40
20. Scalar production in the Early Universe
M. Oleg Lebedev
02/11/2022 14:10
21. Unitarity in Higgs inflation and UV complete models
M. Hyun Min Lee
02/11/2022 14:30
25. Dark Matter beyond freeze-in
Sabir Ramanazov
02/11/2022 14:50
26. Imprints of Mini Primordial Black Holes In Cosmological Data
Lucien Heurtier
02/11/2022 15:10
22. Reheating and dark matter freeze-in in the Higgs-R^2 inflation model
Mlle Adriana Menkara
02/11/2022 16:00
23. Long-lived particles and co-scattering
Mme Genevieve Belanger
02/11/2022 16:20
24. Dark matter and baryogenesis from freeze-in
Andreas Goudelis
02/11/2022 16:40
27. Dark Matter Production from Preheating and Structure Formation Constraints
M. Mathias Pierre
02/11/2022 17:00
53. Colloquium (Testing Superstring Theory with Cosmological Observations)
Robert Brandenberger
03/11/2022 11:00
54. Discussion (Precision and Accurate Cosmology with Euclid : What Awaits Us.)
Alessandra Silvestri
03/11/2022 14:00
55. Discussion (The meaning of "gravitational production")
Bohdan Grzadkowski, Kunio Kaneta, Oleg Lebedev
04/11/2022 11:00
11. Cosmology from the South Pole Telescope
Federica Guidi, Silvia GALLI (IAP)
07/11/2022 14:30

The Planck satellite has set a new frontier for cosmology, providing the most accurate measurements of cosmological parameters to date. It also left us with a number of new, interesting mysteries that might hint to the discovery of new physics. Current and upcoming CMB ground-based experiments will be able to explore these questions further, hopefully providing new insights into these...
12. Cosmic neutrinos and other relics: what remains to be learnt?
Martina Gerbino
07/11/2022 15:30

Cosmology has pioneered the investigation of neutrino properties and the discovery of yet-to-be-observed particles. Cosmological data point to the standard picture of three active, very light, weakly interacting neutrino families, and provide the tightest constraint to-date on the mass sum, complementary to laboratory avenues. The presence of additional light relic particles is also severely...
31. Building the SPT-3G 2019/2020 Likelihood
Etienne Camphuis
08/11/2022 10:00

The South Pole Telescope (SPT) is observing the CMB anisotropies with arcminute resolution using its state-of-the-art camera (SPT-3G). Constraints on cosmological parameters from the obtained data will be as tight as Planck’s one, while remaining independent from the satellite experiment, thus allowing to test the consistency of the two dataset and investigate new physics. A reliable...
32. Neutrino Oscillations: an Avenue to Probe the Universe
Ali Rida Khalife
08/11/2022 10:15

We have reached an advanced stage in our understanding of the Universe, confirmed to a great extent by probes such as the Cosmic Microwave Background(CMB), Gravitational Waves(GW) and Large Scale Structure(LSS). However, there are a few phenomena that, even with these probes, are still mysterious. Particularly, the nature of Dark Energy(DE) and the Hubble Tension. In this talk, I will present...
33. Enabling hydrogen intensity mapping
Isabella Paola Carucci
08/11/2022 10:35

Neutral hydrogen 21-cm emission traces the Universe’s large-scale structure. In par- ticular, if we relax the requirement of galaxy detection and integrate all radiation, we efficiently probe extensive areas, preserving the accurate distance information from the 21-cm line. This strategy is called Intensity Mapping (IM). IM is an emerging science field; many new or planned instruments can...
34. Constraining beyond ΛCDM models with 21cm intensity mapping forecast ob- servations combined with latest CMB data
Maria Berti
08/11/2022 10:55

We explore constraints on dark energy and modified gravity with forecast 21cm inten- sity mapping measurements using the Effective Field Theory approach. We construct a realistic mock data set forecasting a low redshift 21cm signal power spectrum P21(k) measurement from the MeerKAT radio-telescope. We compute constraints on cosmological and model parameters through Monte Carlo Markov chain...
35. Cosmology with Fast Radio Bursts - New constraints on the Hubble constant
Steffen Hagstotz
08/11/2022 11:10

Fast radio bursts (FRBs) are very short and bright transients visible over extragalactic distances. The radio pulse undergoes dispersion caused by free electrons along the line of sight, most of which are associated with the large-scale structure. The total dispersion measure therefore increases with the line of sight and provides a distance estimate to the source. In my talk, I will discuss...
36. Fundamental physics and Cosmology with Fast Radio Bursts
Robert Reischke
08/11/2022 11:35

Fast Radio Bursts (FRBs) are short transients lasting typically a few milliseconds. The pulse experience a dispersion due to scattering from free electrons along the line-of-sight, hence measuring the integrated electron density, the Dispersion Measure (DM). Since FRBs are visible over cosmological distances their statistic can be used to probe the distribution of the electron distribution in...
37. FLASH TALKS + Discussion
08/11/2022 11:55
38. Nonlinear Structure and Linear Dynamics of Voids
Nico Schuster
08/11/2022 14:00

Using state-of-the-art hydrodynamical simulations to identify voids, I will discuss their fundamental properties across different resolutions in mass and scale, such as the spatial distribu- tion of halos and cold dark matter via their density profiles. Furthermore, I will present different estimators for calculating the average radial motion of tracers around these voids and test the validity...
39. Cluster cosmology with Dark Energy Survey
Matteo Costanzi
08/11/2022 14:15

Galaxy clusters have long proven to be a valuable cosmological tool: arising from the highest peaks of the matter density field, they are a sensitive probe of the growth of structures and cosmic expansion. Current and upcoming wide-area photometric surveys — e.g. the Dark- Energy Survey (DES), the Hyper Suprime-Cam Subaru Strategic Program, the Large Synoptic Survey Telescope, Euclid — seek to...
40. Cluster Cosmology with the South Pole Telescope and the Dark Energy Survey
Sebastian Bocquet
08/11/2022 14:35

The abundance of massive halos (and of the galaxy clusters they host) has long been recognized as an extremely promising probe of the large-scale structure of the universe. Over the past decade, tremendous progress was made, notably thanks to the availability of high-resolution surveys of the Cosmic Microwave Background (CMB), of high-quality measurements of gravita- tional lensing, and of...
41. Halo Sparsity: A Swiss army knife for galaxy cluster astrophysics and cosmology
Tamara Richardson (LUTH - Observatoire de Paris | PSL)
08/11/2022 14:55

Halo sparsity, the ratio of two masses of a dark matter halo measured at two different overdensities, has proven itself to be a promising avenue to probe cosmology using the internal structure of dark matter haloes. In this talk I will present multiple applications of halo sparsity beyond current cosmological constraints. Most notably I will show how sparsity correlates with the dynamical...
42. Studying the impact of galaxy cluster morphologies on their detection through SZ effect
Stefano Gallo
08/11/2022 15:10

In any cosmological analysis based on the galaxy cluster number count, a very important ingredient is the selection function of the detection method used to produce the galaxy cluster catalog. Indeed, an incorrect determination of this function can lead to biases in the cosmological parameters estimated from the data. In this work we aim to study the possible impact of complex cluster...
43. Cosmology with galaxy clustering: a joint analysis of the power spectrum and bispectrum
Chiara Moretti
08/11/2022 15:40

Future generations of galaxy redshift surveys will sample the large-scale structure of the Universe over unprecedented volumes with high-density tracers, allowing for precise measurements of the clustering statistics. In order to properly exploit the full potential of such data, a robust likelihood pipeline is required, starting with an accurate theoretical prediction of cosmological ob-...
44. Bispectrum and finite volume effects: window convolution
Kevin Pardede
08/11/2022 16:00

One particular class of observables to study galaxy clustering are Fourier-space summary statistics of the galaxy distribution. The higher order statistics such as the galaxy bispectrum offers non-trivial information with respect to the power spectrum, and in particular can directly probe a primordial non-Gaussian component, possibly shedding light on the interactions taking place during...
45. Accounting for theoretical uncertainties in LSS analyses
Thejs Brinckmann
08/11/2022 16:15

Current and future large-scale structure surveys increasingly push to smaller scales with improved precision. This poses challenges, as non-linear structure formation is not perfectly understood and modern cosmological simulations and methods derived from them, such as emula- tors and tuned halo model approaches, do not perfectly agree. As experimental precision and the statistical samples...
47. Redshift Calibration for Weak Lensing Surveys
Anna Wittje
08/11/2022 16:35

Cosmic shear measures the (dark) matter distribution of the Universe through the weak gravitational lensing of large samples of galaxies. To probe the statistical properties of the large scale structure and estimate cosmological parameters like the dark matter density parameter, we use deep and wide optical imaging surveys. One crucial ingredient for the statistical analyses is the redshift...
48. FLASH TALKS + Discussion
08/11/2022 16:50
5. Galaxy Clustering Beyond the Power Spectrum
Emiliano Sefusatti (INAF - Osservatorio Astronomico di Trieste)
09/11/2022 10:00

The 2-point Correlation Function and its Fourier-space counterpart, the Power Spectrum play a major role in the analysis of spectroscopic galaxy surveys. Yet, they do not describe the full statistical properties of cosmological perturbations at low redshift, a highly non-Gaussian random field. Non-Gaussian properties are quantified by higher-order correlation functions such as the galaxy...
4. Large-Scale Structure Cosmology in the Systematics-Limited Regime
Elisabeth Krause
09/11/2022 11:00

Over the next decade, large galaxy surveys will map billions of galaxies and probe cosmic structure formation with high statistical precision. This talk will outline opportunities and challenges of cosmological analyses in the presence of complex systematic effects using recent results from the Dark Energy Survey as pathfinder examples. In particular, I will describe dif- ferent cosmological...
3. Cosmic shear: Going from stage-III to stage-IV
Hendrik Hildebrandt
09/11/2022 11:45

I will review the current state-of-the-art of cosmic shear surveys and the major ob- servational and theoretical systematics that need to be understood to attain robust cosmological results. Given the delays of the upcoming stage-IV surveys, I will give a near-term outlook on what can be expected from the established stage-III surveys in the next couple of years. The significant hurdles that...
6. Cosmology with galaxy clusters
Jean-Baptiste Melin
09/11/2022 14:30

The concordance model LambdaCDM, which appeared in the late 1990’s, has been extremely successful. The model has been confirmed by new and increasingly precise cosmological observations for more than 15 years. But since 2015, measurements from different probes show possible tensions between parameters. Clusters of galaxies contributed to the building of the model since the beginning and...
10. Cosmological Constraints from Galaxy Cluster Mass Profiles
PierStefano Corasaniti
09/11/2022 15:15

Galaxy clusters are the large structures in the universe. Host in massive dark matter halos, they are the ultimate result of hierachical bottom-up process of cosmic structure formation. The non-linear gravitational collapse of matter which drives the mass assembly of galaxy cluster leaves a cosmological imprint on the abundance, spatial clustering and internal structure. Because of this,...
8. 21cm Intensity Mapping: opportunities and challenges on the road to the SKA Observatory
Marta Spinelli
09/11/2022 16:00

Radio telescopes such as MeerKAT, and in the future the SKA Observatory, can map the spatial distribution of the post-reionization cosmic neutral hydrogen using Intensity Mapping techniques for the 21 cm line. These measurements can unveil the underlying large-scale structure of the Universe and contribute in a fundamental way to our understanding of structure growth. A key point is the...
7. Fundamental Physics from the Unexplored Universe
Nico Hamaus
10/11/2022 10:00

Cosmic voids – vast regions of relatively empty space that prevail throughout the Universe – may hold new clues to some long-standing problems in cosmology, yet they have largely been neglected as a cosmological probe by the scientific community until recently. The current and next generation of large-scale structure surveys for the first time enable a rigorous statistical treatment of voids...
9. More than the sum of its parts: joint analysis of LSS and CMB experiments
Stephane Ilic (IJCLab)
10/11/2022 11:00

Through weak lensing and galaxy clustering measurements, future large-scale galaxy surveys will provide unprecedented constraints on the late Universe. On the other hand, high-quality CMB observations (Planck and future CMB experiments) can -- and already do -- put tight constraints on the early Universe. In this talk, I will show that combining these two sources of cosmological information...
29. From standard to constrained cosmological simulations
Jenny Sorce
10/11/2022 14:30

To understand dark matter and energy, large cosmological surveys are designed to reach a few percent precision. This large quantity of data needs to be analyzed in light of cosmological simulations, to be fully exploited. Such preliminary analyses brought out tensions between the standard cosmological model and observations. Reaching a 1% precision, systematics of the same order of magnitude,...
66. Cosmology with Fast Radio Bursts
Robert Reischke, Steffen Hagstotz
15/11/2022 10:30
59. Lessons learned from multi-messenger models of active galaxies
Xavier Rodriguez
15/11/2022 11:00

Evidence is pointing more and more clearly to blazars and other active galaxies as significant multi-messenger sources.
In this talk I summarize some of the latest developments in the modeling of cosmic-ray interactions in blazars and how these models can explain recent associations between IceCube events and individual sources. I also discuss the predicted flare signatures across the...
60. Teieresias Radiative Transfer: Consistently modelling the Kilonova Afterglow with Relativistic Hydrodynamics.
Ethan van Woerkom
15/11/2022 11:30

The kilonova afterglow is the final phase of the electromagnetic counterpart to a BNS/NSBH merger, and it is the only predicted counterpart of GW170817, which has not been observed yet. The kilonova afterglow lightcurve is dependent on the mass, velocity and angular distributions of the ejecta, and thus represents an opportunity to independently constrain these properties. We present Teiresias...
62. Multi-Messenger studies: From ideas to realization
Jakob Nordin
15/11/2022 12:00

I will use the recently observed association between extragalactic neutrinos and tidal disruption events as a starting point for an exploration of the tools needed to go from a scientific hypothesis to an active, high throughput time-domain program. I will introduce some of the concepts built into the AMPEL platform which were designed to make this possible.
58. Fast astrophysical multi-messenger astrophysics with DWF
Anais Möller (Swinburne University)
15/11/2022 14:00

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The Deeper Wider Fast Programme (DWF) aims to discover and rapidly follow up the fastest bursts in the Universe (those lasting only milliseconds to hours). For this, we execute a main strategy comprised of coordinated international multi-facility, all-wavelength, and multi-messenger telescope observing runs to detect and follow up fast...
56. 20 years of INTEGRAL
Philippe Laurent
15/11/2022 14:30
57. The GRINTA mission for the next decade exploitation of the multimessenger sky
Lorenzo Natalucci
15/11/2022 15:00

The Gamma-Ray International Transient Array observatory (GRINTA) is a fast class mission designed to be a major breakthrough in the next decade (>2030) time domain astronomy, in particular for the multi-messenger domain. Transient signals from sources of gamma-ray bursts, gravitational waves and high energy neutrinos are known to produce hard X-rays that can be detected by an instrument with...
61. General Coordinates Network (GCN): NASA’s Next Generation Time-Domain and Multimessenger Astronomy Alert System
Leo Singer
15/11/2022 16:00

The Gamma-ray Coordinates Network (GCN) is a public collaboration platform run by NASA for the astronomy research community to share alerts and rapid communications about high-energy, multimessenger, and transient phenomena. Over the past 30 years, GCN has helped enable many seminal advances by disseminating observations, quantitative near-term predictions, requests for follow-up observations,...
63. The H.E.S.S transients follow-up system
Halim ASHKAR (CNRS - Ecole Polytechnique - LLR)
15/11/2022 16:30
64. GRB observations with IACTs
Sylvia Zhu (DESY)
15/11/2022 17:00

In the last few years, very-high-energy (>100 GeV) emission from gamma-ray bursts (GRBs) has been detected for the first time, allowing us to build a multiwavelength picture of GRBs that extends all the way up to TeV energies. Now that we’ve detected a few GRBs, the question becomes: What’s next? In this talk, I will describe the GRB programs of the current generation of air Cherenkov...
65. Astro-COLIBRI in practice
Patrick Reichherzer (Ruhr-Universität Bochum (RUB))
15/11/2022 17:30

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The study of flaring astrophysical events in the multi-messenger approach requires instantaneous follow-up observations to better understand the nature of these events through complementary observational data. We present Astro-COLIBRI as a meta platform for the patchwork of different specific tools in the real-time multi-messenger...
85. Discussion session on Alerts, formats and protocols
Ada Nebot, Leo Singer (NASA Goddard Space Flight Center)
18/11/2022 10:30
75. Paleo-detectors - Introduction and motivations
Lorenzo Caccianiga (Istituto Nazionale di Fisica Nucleare - Sezione di Milano)
22/11/2022 11:00
76. Paleo-detectors - the ideal mineral
Claudio GALELLI (UNIMI)
22/11/2022 12:00
67. Gamma-ray format GADF
Maximilian Linhoff (Department of Physics, TU Dortmund University)
22/11/2022 15:00
68. VODF format: evolution and path forward
Karl Kosack (CEA Paris-Saclay, IRFU/DAp)
22/11/2022 15:20
69. HAWC DL3 format
22/11/2022 15:40
70. Road map discussion
22/11/2022 16:00
89. Atmospheric electricity
Roberta Colalillo (INFN -- Napoli), Roberto Mussa (INFN -- Torino)
23/11/2022 11:00
71. Model & interface
Dr Fabio ACERO (AIM, CEA, CNRS, Universite Paris-Saclay, Universite Paris)
23/11/2022 14:30

State of the art for models : astromodel, astropy.modeling, sherpa, Xspec,
What models are needed for a MWL/MM MWL/MM.
How to guarantee model sustainability (eg: Naima, Xspec)
78. Numerical local source modeling of active galactic nuclei
Leander Schlegel (Ruhr-Universität Bochum)
24/11/2022 10:30
79. Constraining cosmic-ray sources with efficient propagation models
M. Xavier Rodrigues
24/11/2022 10:45
80. Horizon of UHECRs in galaxy clusters
Antonio Condorelli (IJCLAB)
24/11/2022 11:00
81. Constraining transient sources of UHECRs with arrival directions
Sullivan MARAFICO
24/11/2022 11:15
82. Indications of the Gerasimova-Zatsepin effect in the Auger scalers data
M. Martin Schimassek (IJCLab)
24/11/2022 11:30
83. 450 years of de nova stella - Tycho's supernova
Dr Fabio ACERO (AIM, CEA, CNRS, Universite Paris-Saclay, Universite Paris)
24/11/2022 11:45
84. Flares associated with the synchrotron emission from the Crab pulsar wind nebula
Michelle Tsirou (DESY)
24/11/2022 12:00
86. STeVeCAT
Lucas Greaux
24/11/2022 12:15
87. Placehoder
Sara Buson (Univ. of Wuerzburg)
24/11/2022 12:30
72. Implementation of X/gamma-ray joint fit in gammapy
Luca Giunti
24/11/2022 14:30
73. How to handle MWL & multi-instrument fit in with gammapy
Fabio ACERO (AIM, CEA, CNRS, Universite Paris-Saclay, Universite Paris)
24/11/2022 15:00
19. ..
M. .. ..
30. Constraining cosmology with the summer fields of the South Pole Telescope
Federica Guidi

The South Pole Telescope (SPT) is observing the CMB with arcminutes resolution, with its third generation camera (SPT-3G). One of the main goals is to improve the current constraints on cosmological parameters. During the first observing season, SPT-3G observed its baseline sky patch (1500 deg2), and obtained cosmological constraints consistent with those from the Planck mission. Deeper...
2. Cosmological tensions and possible connections with new physics
Prof. Julien Lesgourgues (Aachen)
74. Multi-messenger Gamma/neutrinos analysis
88. Placeholder
77. The EOSC multi-wavelength analysis prototype (MAP) for black hole models
M. Sheridan Lloyd
46. The halo model with beyond-linear halo bias: unbiasing cosmological con- straints from galaxy–galaxy lensing and clustering
Constance Mahony

The halo model is a phenomenological model often used to interpret the large-scale structure of the Universe. In this model all dark matter exists within dark matter halos, which trace the underlying matter fluctuations. In its most generic form it includes a number of approx- imations such as dark matter halos are spherical and can be completely described by their mass, and that the halos...
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