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DELPHI: a framework to study Dark Matter and the emergence of galaxies in the epoch of reionization

Total Cost €


EC-Contrib. €






 DELPHI project word cloud

Explore the words cloud of the DELPHI project. It provides you a very rough idea of what is the project "DELPHI" about.

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Project "DELPHI" data sheet

The following table provides information about the project.


Organization address
address: Broerstraat 5
postcode: 9712CP

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Netherlands [NL]
 Total cost 1˙500˙000 €
 EC max contribution 1˙500˙000 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-STG
 Funding Scheme ERC-STG
 Starting year 2017
 Duration (year-month-day) from 2017-03-01   to  2022-02-28


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

Our Universe started as a dark featureless sea of hydrogen, helium, and dark matter of unknown composition about 13 and a half billion years ago. The earliest galaxies lit up the Universe with pinpricks of light, ushering in the era of ‘cosmic dawn’. These galaxies represent the primary building blocks of all subsequent galaxies and the sources of the first (hydrogen ionizing) photons that could break apart the hydrogen atoms suffusing all of space starting the process of ‘cosmic reionization’. By virtue of being the smallest bound structures in the early Universe, these galaxies also provide an excellent testbed for models wherein Dark Matter is composed of warm, fast moving particles as opposed to the sluggish heavy particles used in the standard Cold Dark Matter paradigm.

Exploiting the power of the latest cosmological simulations as well as semi-analytic modelling rooted in first principles, DELPHI will build a coherent and predictive model to answer three of the key outstanding questions in physical cosmology: - how did the interlinked processes of galaxy formation and reionization drive each other? - what were the physical properties of early galaxies and how have they evolved through time to give rise to the galaxy properties we see today? - what is the nature (mass) of the mysterious Dark Matter that makes up 80% of the matter content in the Universe?

The timescale of the ERC represents an excellent opportunity for progress on these fundamental questions: observations with cutting-edge instruments (e.g. the Hubble and Subaru telescopes) are providing the first tantalising glimpses of early galaxies assembling in an infant Universe, required to pin down theoretical models. The realistic results obtained by DELPHI will also be vital in determining survey strategies and exploiting synergies between forthcoming key state-of-the-art instruments such as the European-Extremely Large Telescope, the James Webb Space Telescope and the Square Kilometre Array.


year authors and title journal last update
List of publications.
2019 E Lusso, M Fumagalli, M Fossati, R Mackenzie, R M Bielby, F Arrigoni Battaia, S Cantalupo, R Cooke, S Cristiani, P Dayal, V D’Odorico, F Haardt, E Lofthouse, S Morris, C Peroux, L Prichard, M Rafelski, R Simcoe, M Swinbank, T Theuns
The MUSE Ultra Deep Field (MUDF). I. Discovery of a group of Lyα nebulae associated with a bright z ≈ 3.23 quasar pair
published pages: , ISSN: 1745-3933, DOI: 10.1093/mnrasl/slz032
Monthly Notices of the Royal Astronomical Society: Letters 2020-03-23
2019 Atrideb Chatterjee, Pratika Dayal, Tirthankar Roy Choudhury, Anne Hutter
Ruling out 3 keV warm dark matter using 21 cm EDGES data
published pages: 3560-3567, ISSN: 0035-8711, DOI: 10.1093/mnras/stz1444
Monthly Notices of the Royal Astronomical Society 487/3 2020-03-23
2019 Pratika Dayal, Elena M Rossi, Banafsheh Shiralilou, Olmo Piana, Tirthankar Roy Choudhury, Marta Volonteri
The hierarchical assembly of galaxies and black holes in the first billion years: predictions for the era of gravitational wave astronomy
published pages: 2336-2350, ISSN: 0035-8711, DOI: 10.1093/mnras/stz897
Monthly Notices of the Royal Astronomical Society 486/2 2020-03-23
2019 Jacob Seiler, Anne Hutter, Manodeep Sinha, Darren Croton
The escape fraction of ionizing photons during the Epoch of Reionization: observability with the Square Kilometre Array
published pages: 5739-5752, ISSN: 0035-8711, DOI: 10.1093/mnras/stz1663
Monthly Notices of the Royal Astronomical Society 487/4 2020-03-23
2018 Pratika Dayal, Andrea Ferrara
Early galaxy formation and its large-scale effects
published pages: 1-64, ISSN: 0370-1573, DOI: 10.1016/j.physrep.2018.10.002
Physics Reports 780-782 2020-03-23
2019 Hutter, Anne; Dayal, Pratika; Malhotra, Sangeeta; Rhoads, James; Choudhury, Tirthankar Roy; Ciardi, Benedetta; Conselice, Christopher J.; Cooray, Asantha; Cuby, Jean-Gabriel; Datta, Kanan K.; Fan, Xiaohui; Finkelstein, Steven; Hirata, Christopher; Iliev, Ilian; Jansen, Rolf; Kakiichi, Koki; Koekemoer, Anton; Maio, Umberto; Majumdar, Suman; Mellema, Garrelt; Mondal, Rajesh; Papovich, Casey; Rhodes,
Astro2020 Science White Paper: A proposal to exploit galaxy-21cm synergies to shed light on the Epoch of Reionization
published pages: , ISSN: , DOI:
Astro2020: Decadal Survey on Astronomy and Astrophysics, science white papers, no. 57; Bulletin of the American Astronomical Society, Vol. 51, Issue 3, id. 57 (2019) 1 2020-03-23
2019 Mischa Knabenhans, Joachim Stadel, Stefano Marelli, Doug Potter, Romain Teyssier, Laurent Legrand, Aurel Schneider, Bruno Sudret, Linda Blot, Saeeda Awan, Carlo Burigana, Carla Sofia Carvalho, Hannu Kurki-Suonio, Gabriele Sirri
Euclid preparation: II. The EuclidEmulator – a tool to compute the cosmology dependence of the nonlinear matter power spectrum
published pages: 5509-5529, ISSN: 0035-8711, DOI: 10.1093/mnras/stz197
Monthly Notices of the Royal Astronomical Society 484/4 2020-03-23
2017 Pratika Dayal, Tirthankar Roy Choudhury, Fabio Pacucci, Volker Bromm
Warm dark matter constraints from high-z direct collapse black holes using the JWST
published pages: 4414-4421, ISSN: 0035-8711, DOI: 10.1093/mnras/stx2282
Monthly Notices of the Royal Astronomical Society 472/4 2020-03-23
2018 Anne Hutter, Cathryn M Trott, Pratika Dayal
Survey parameters for detecting 21-cm-Ly α emitter cross-correlations with the Square Kilometre Array
published pages: L129-L133, ISSN: 1745-3933, DOI: 10.1093/mnrasl/sly115
Monthly Notices of the Royal Astronomical Society: Letters 479/1 2020-03-23
2018 Tirthankar Roy Choudhury, Pratika Dayal
Probing the fluctuating ultraviolet background using the Hubble Frontier Fields
published pages: L19-L23, ISSN: 1745-3933, DOI: 10.1093/mnrasl/sly186
Monthly Notices of the Royal Astronomical Society: Letters 482/1 2020-03-23
2018 Jonas Bremer, Pratika Dayal, Emma V Ryan-Weber
Probing the nature of dark matter through the metal enrichment of the intergalactic medium
published pages: 2154-2163, ISSN: 0035-8711, DOI: 10.1093/mnras/sty771
Monthly Notices of the Royal Astronomical Society 477/2 2020-03-23
2018 M. Castellano, L. Pentericci, E. Vanzella, F. Marchi, A. Fontana, P. Dayal, A. Ferrara, A. Hutter, S. Carniani, S. Cristiani, M. Dickinson, S. Gallerani, E. Giallongo, M. Giavalisco, A. Grazian, R. Maiolino, E. Merlin, D. Paris, S. Pilo, P. Santini
Spectroscopic Investigation of a Reionized Galaxy Overdensity at z = 7
published pages: L3, ISSN: 2041-8213, DOI: 10.3847/2041-8213/aad59b
The Astrophysical Journal 863/1 2020-03-23
2017 C. L. Carilli, E. J. Murphy, A. Ferrara, P. Dayal
Galaxies into the Dark Ages
published pages: 49, ISSN: 1538-4357, DOI: 10.3847/1538-4357/aa8b66
The Astrophysical Journal 848/1 2020-03-23

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