CoSyne: Cosmological Synergies in the upcoming decade

Amphitheater (Institut d'astrophysique de Paris)


Institut d'astrophysique de Paris

98bis Boulevard Arago, Paris 75014
Amandine Guillemois (IAP), Benjamin Wandelt (IAP), François R. Bouchet (IAP), Guilhem Lavaux (Institut d'Asrophysique de Paris / CNRS), Igniatios Antoniadis (Ecole Polytechnique Centre de Physique Theorique (CPHT)), Pierre Astier (LPNHE), Silvia Galli (IAP), Suvodip Mukherjee (IAP), Sébastien Renaux-Petel (IAP-CNRS)

The coming decade of astrophysics and cosmology will be driven by a large number of missions which will explore the cosmos observing the sky through e.g. electromagnetic waves, cosmic and gamma rays, gravitational waves and neutrinos. This will make possible a multi-messenger approach, capitalizing on multiple probes that capture phenomena of the Universe in different observational channels over a large range of redshifts and will open the opportunity to study the synergies between different experiments.

The conference will bring researchers working on theoretical aspects, statistical methods and observational cosmology and will discuss the new directions of fundamental physics and cosmological mysteries which can be addressed from these multi-messenger multi-frequency probes. Along with probing the fundamental aspect of gravity, nature of dark energy, properties of dark matter, primordial gravitational waves, neutrino masses and hierarchy, next-generation missions will also be powerful probes to learn about the astrophysical aspects such as the population of black holes, properties of first stars, reionization history of the Universe, galaxy evolution and the interplay between cosmological and astrophysical effects. The meeting will also discuss future statistical tools and machine learning techniques which will be required to make robust measurements from the data which will be available from the upcoming missions on astrophysical gravitational waves, cosmic microwave background, large scale structure, line intensity mapping, supernovae and many others.


  • Abir Sarkar
  • Aditya Rotti
  • Alessandra Silvestri
  • Alkistis Pourtsidou
  • Amandine Guillemois
  • Andrea Ravenni
  • Aoife Boyle
  • Ayan Mitra
  • Benjamin Giblin
  • Benjamin L'Huillier
  • Benjamin Wandelt
  • Blake Sherwin
  • Carolina Queiroz A. Silva
  • Chiara Moretti
  • Cora Dvorkin
  • Daniel Gilman
  • Danièle Steer
  • David Valls-Gabaud
  • Debabrata Adak
  • Elena Massara
  • Eric Armengaud
  • Fabian Schmidt
  • Faizan Mohammad
  • Florent Leclercq
  • Francois Boulanger
  • Guilhem Lavaux
  • Ignatios Antoniadis
  • Jaiyul Yoo
  • Jean-Eric Campagne
  • Jens Chluba
  • Jens Jasche
  • Joe Silk
  • Jose Ramon Bermejo Climent
  • karim benabed
  • Ken Osato
  • Lars Hernquist
  • Lucas Pinol
  • Luke Hart
  • Mario Ballardini
  • Marius Millea
  • Marta Spinelli
  • Marta Volonteri
  • Matteo Martinelli
  • Niall Jeffrey
  • Nico Hamaus
  • Oliver Hahn
  • Omar Darwish
  • Paul Shapiro
  • Rahul Biswas
  • Raul Jimenez
  • Samaya Nissanke
  • Sandrine Codis
  • Sebastien Renaux-Petel
  • Sergei Shandarin
  • Stefano Anselmi
  • Stephen Appleby
  • Stephen Feeney
  • Steve Cunnington
  • Subhendra Mohanty
  • Suvodip Mukherjee
  • Sylvie Dagoret-Campagne
  • Tanja Rindler-Daller
  • Tarun Souradeep
  • Tiago Batalha de Castro
  • Yashar Akrami
  • Yashar Hezaveh
  • Yohan Dubois
  • Young-Lo KIM
    • 08:30 09:30
      Registration Lobby


    • 09:30 09:45
      Introduction 15m
    • 09:45 10:15
      Gravitational Collider Physics 30m

      Session chair: Sebastien Renaux-Petel

      Speaker: Daniel Baumann
    • 10:15 10:30
      Constraining components from the recombination epoch with CMB data and direct projection 15m
      Speaker: Luke Hart
    • 10:30 10:45
      Background photon temperature: A new cosmological Parameter? 15m
      Speaker: Jaiyul Yoo
    • 10:45 11:10
      Coffee/Tea break 25m Lobby


    • 11:10 11:40
      Non-Gaussianities with next generation CMB experiments: challenges and new observables 30m
      Speaker: Daniel Meerburg
    • 11:40 12:10
      Cosmological Discoveries with the SPHEREx and WFIRST Missions 30m
      Speaker: Olivier Dore
    • 12:10 12:25
      Revisiting non-Gaussianity in multifield inflation with curved field space 15m
      Speaker: Lucas Pinol
    • 12:25 12:40
      The future of the primordial features down to non-linear scales 15m
      Speaker: Mario Ballardini
    • 12:40 12:45
      Flash talks for posters 5m
      Speakers: Ayan Mitra, Benjamin L'Huillier (Yonsei University), Debabrata Adak
    • 12:45 14:15
      Lunch break 1h 30m
    • 14:15 14:45
      Unveiling the Nature of Dark Matter with Cosmological Observables 30m

      Session Chair: Jens Chluba

      Speaker: Cora Dvorkin
    • 14:45 15:15
      TBD 30m
      Speaker: Yashar Hezaveh
    • 15:15 15:45
      The astrophysics of particle dark matter searches 30m
      Speaker: Subha Majumdar
    • 15:45 16:00
      DeepMass: Deep learning dark matter map reconstructions from DES SV weak lensing data 15m
      Speaker: Niall Jeffrey
    • 16:00 16:25
      Coffee/Tea break 25m Lobby


    • 16:25 16:55
      Next-Generation Cosmological Simulations 30m
      Speaker: Salman Habib
    • 16:55 17:10
      Three Unique Traites of the Dark Matter Web 15m
      Speaker: Sergei Shandarin
    • 17:10 17:25
      Testing the paradigm of cold dark matter with the small-scale Universe 15m
      Speaker: Keir Rogers
    • 17:25 17:40
      Properties of dark matter with the Lyman-alpha forest 15m
      Speaker: Eric Armengaud
    • 17:40 17:55
      Scalar-field dark matter versus standard CDM: looking for deviance 15m
      Speaker: Tanja Rindler-Daller
    • 17:55 18:10
      Constraining the nature of dark matter with strong gravitational lenses 15m
      Speaker: Daniel Gilman
    • 18:10 18:25
      Light particle radiation from binary pulsars 15m
      Speaker: Subhendra Mohanty
    • 18:25 18:40
      Panel Discussions 15m
    • 18:40 20:00
      Posters viewing with wine & cheese 1h 20m Lobby


    • 09:30 10:00
      Neutrino mass from cosmology 30m

      Session Chair: Fabian Schmidt

      Speaker: Julien Lesgourgues
    • 10:00 10:30
      Primordial non-Gaussianity and Neutrino Mass from the Clustering of Voids 30m
      Speaker: Nico Hamaus
    • 10:30 10:45
      Weighting neutrinos with marked power spectra 15m
      Speaker: Elena Massara
    • 10:45 10:50
      Group photo (credit: Jean Mouette /IAP-CNRS-SU) 5m Lobby


    • 10:50 11:15
      Coffee/Tea break 25m Lobby


    • 11:15 11:30
      Deconstructing Neutrino Mass Constraints from Galaxy Clustering and CMB Lensing 15m
      Speaker: Aoife Boyle
    • 11:30 12:00
      The role of relativistic SZ in cosmology 30m
      Speaker: Jens Chluba
    • 12:00 12:15
      Effects of incorporating relativistic Sunyaev-Zeldovich effects in galaxy cluster analysis using microwave data 15m
      Speaker: Aditya Rotti
    • 12:15 12:30
      The effect of Baryons on Cluster Cosmology 15m
      Speaker: Tiago Castro
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 14:30
      Large Scale Structure after GW170817: the lesson we have learned about synergies 30m

      Session Chair: Ignatios Antoniadis

      Speaker: Alessandra Silvestri
    • 14:30 15:00
      Understanding the Universe 30m
      Speaker: Raul Jimenez
    • 15:00 15:30
      Cosmological Synergies with Time Domain Astronomy 30m
      Speaker: Rahul Biswas
    • 15:30 15:45
      Approximate methods to generate halo catalogs with modified gravity 15m
      Speaker: Chiara Moretti
    • 15:45 16:10
      Coffee/Tea break 25m Lobby


    • 16:10 16:40
      The H0 tension and SNeIa Astrophysical biases 30m
      Speaker: Mickael Rigault
    • 16:40 16:55
      Studying the Environmental Dependence of Type Ia Supernova Luminosities 15m
      Speaker: Young-Lo KIM
    • 16:55 17:25
      Clarifying the Hubble Constant Tension 30m
      Speaker: Stephen Feeney
    • 17:25 17:40
      The Local Universe and the Cosmological and Copernican principles within Lambda CDM 15m
      Speaker: Mohamed Rameez
    • 17:40 17:55
      Future Strong Lensing Time Delay constraints on Dark Energy 15m
      Speaker: Matteo Martinelli
    • 17:55 18:10
      Cosmological synergies with “Purely Geometric Baryon Acoustic Oscillations” methods: the case of the Linear Point and the Sound Horizon standard rulers 15m
      Speaker: Stefano Anselmi
    • 18:10 18:25
      Panel Discussions 15m
    • 19:30 22:30
      Conference Dinner 3h
    • 09:00 09:30

      Session chair: Suvodip Mukherjee

      Speaker: Priya Natarajan
    • 09:30 10:00
      Massive black hole binaries in the cosmic landscape 30m
      Speaker: Marta Volonteri
    • 10:00 10:30
      New perspectives onto the Universe in the era of multi-messenger astronomy 30m
      Speaker: Samaya Nissanke
    • 10:30 10:45
      Selecting quasars with 56 colors: the mini-JPAS as a test case 15m
      Speaker: Carolina Queiroz
    • 10:45 11:10
      Coffee/Tea break 25m Lobby


    • 11:10 11:40
      Mapping most of the universe with 21cm 30m
      Speaker: Albert Stebbins
    • 11:40 12:10
      Synergies between radio intensity mapping and optical galaxy surveys 30m
      Speaker: Alkistis Pourtsidou
    • 12:10 12:25
      The Cosmic Dawn (CoDa) Project: Simulating Reionization and Galaxy Formation 15m
      Speaker: Paul Shapiro
    • 12:25 12:40
      The atomic Hydrogen content of the post-reionization Universe 15m
      Speaker: Marta Spinelli
    • 12:40 14:10
      Lunch break 1h 30m
    • 14:10 14:40
      Near-term Multi-Line Intensity Mapping 30m

      Session Chair: Guilhem Lavaux

      Speaker: Tzu-Ching Chang
    • 14:40 15:10
      TBD 30m
      Speaker: Asantha Cooray
    • 15:10 15:25
      Using Radio 21cm Intensity Maps to Calibrate Photometric Redshifts 15m
      Speaker: Steve Cunnington
    • 15:25 15:50
      Coffee/Tea break 25m Lobby


    • 15:50 16:20
      TBD 30m
      Speaker: Licia Verde
    • 16:20 16:50
      TBD 30m
      Speaker: Jens Jasche
    • 16:50 17:20
      Primordial power spectrum and cosmology from black-box galaxy surveys 30m
      Speaker: Florent Leclercq
    • 17:20 17:35
      Non-linear matter power spectra predictions for arbitrary cosmologies 15m
      Speaker: Benjamin Giblin
    • 17:35 17:50
      Cosmological Parameter Estimation from Topological Statistics 15m
      Speaker: Stephen Appleby
    • 17:50 18:20
      First results of SRG/eRosita and plans in interests of cosmology. Two ways to detect clusters of galaxies during sky surveys: Synergy and Competition 30m
      Speaker: Rashid Sunyaev
    • 18:20 18:35
      Panel Discussions 15m
    • 09:30 10:00
      Planck legacy: Enabling future synergies 30m

      Session Chair: Cora Dvorkin

      Speaker: Karim Benabed
    • 10:00 10:30
      Steps towards a statistical modelling of Galactic foregrounds for cosmology 30m
      Speaker: Francois Boulanger
    • 10:30 11:00
      TBD 30m
      Speaker: Blake Sherwin
    • 11:00 11:25
      Coffee/Tea break 25m Lobby


    • 11:25 11:55
      The promises and challenges of the Euclid mission for weak lensing 30m
      Speaker: Francis Bernardeau
    • 11:55 12:25
      Unbiased galaxy surveys on cosmological scales 30m
      Speaker: David Valls Gabaud
    • 12:25 12:40
      Correcting clustering measurements for missing observations in the extended Baryon Oscillation Spectroscopic Survey 15m
      Speaker: Faizan Gohar Mohammad
    • 12:40 14:10
      Lunch break 1h 30m
    • 14:10 14:40
      Astrophysical Synergies: Baryons, Bias, and Alignments 30m

      Session Chair: Benjamin D. Wandelt

      Speaker: Fabian Schmidt
    • 14:40 15:10
      Initial conditions for cosmological simulations: the next generation 30m
      Speaker: Oliver Hahn
    • 15:10 15:40
      TBD 30m
      Speaker: Yohan Dubois
    • 15:40 16:05
      Coffee/Tea break 25m Lobby


    • 16:05 16:35
      Open questions in Cosmology 30m
      Speaker: Joe Silk
    • 16:35 17:05
      CMB-Bhārat: Indian flavours in the next Generation CMB effort 30m
      Speaker: Tarun Souradeep
    • 17:05 17:20
      The Atacama Cosmology Telescope:A CMB lensing mass map and its cross-correlation with BOSS-CMASS galaxies 15m
      Speaker: Omar Darwish
    • 17:20 17:35
      A 2020s Vision of CMB Lensing 15m
      Speaker: Marius Millea
    • 17:35 17:50
      Cosmology and cluster astrophysics with cross-correlations of HSC WL and Planck tSZ 15m
      Speaker: Ken Osato
    • 17:50 18:05
      Measuring lensing ratios with upcoming and future cosmological surveys 15m
      Speaker: Jose Ramon Bermejo Climent
    • 18:05 18:20
      Cosmology with weak lensing multi-probes 15m
      Speaker: Joachim Harnois-Deraps
    • 18:20 18:35
      Panel Discussions 15m
    • 18:35 18:45
      Concluding remarks 10m