Fundamental Physics at 21 cm

Europe/Rome
Lecture Hall D (Trieste IFPU)

Lecture Hall D

Trieste IFPU

Via Beirut 2-4 (Miramare Campus), Trieste https://www.ifpu.it/
Description

IMPORTANT UPDATE

Due to the developing situation with the Covid-19 in Italy, we have decided to postpone the workshop “Fundamental physics at 21 cm” to a future date to be arranged, possibly next fall.

Do not hesitate to contact us for any question or concern. 

 

Registration
Fundamental Physics at 21 cm
Participants
  • Alessandro Podo
  • Anastasia Sokolenko
  • Andrea Bracco
  • Andrea Caputo
  • Andrej Obuljen
  • Benedetta Spina
  • Deanna C. Hooper
  • Debanjan Sarkar
  • Elena Pinetti
  • Fabio Finelli
  • Francesco D'Eramo
  • Guido D'Amico
  • Guillermo Franco Abellán
  • Isabella Paola Carucci
  • Laura Lopez Honorez
  • Lorenzo Piga
  • Mario Ballardini
  • Marta Spinelli
  • Nadav Joseph Outmezguine
  • Olga Mena
  • Pablo Villanueva Domingo
  • Quentin Decant
  • Raul Monsalve
  • Riccardo Murgia
  • Samir Choudhuri
  • Samuel Witte
  • Stefan Sandner
  • Vibor Jelic
  • Vivian Poulin
  • Yuxiang Qin
    • 12:00
      Welcome
    • 1
      An Absorption Feature in Observations with EDGES Mid-Band

      I will present results from observations with the EDGES Mid-Band system. This instrument measured in 2018 the sky-averaged radio spectrum in the range ~60-120 MHz. It used a blade antenna that is ~30% smaller than the Low-Band antennas used for the measurements in Bowman et al. (2018). Despite the smaller antenna, in the Mid-Band spectrum we identify an absorption feature that is consistent with our Low-Band result. This consistency increases the confidence that this feature is not an instrumental artifact but instead a spectral property of the sky. In my talk I will describe the Mid-Band observations, instrument calibration, data modelling, and characteristics of the Mid-Band absorption signal.

      Speaker: Prof. Raul Monsalve (Department of Physics and McGill Space Institute McGill University)
    • 2
      Dark Matter in Light of the 21cm EDGES Signal
      Speaker: Prof. Kovetz Ely (Ben Gurion Univ. )
    • 16:30
      coffee break
    • 3
      Complementarity of CMB and 21cm for the study of dark matter properties and exotic reionization

      In this talk, I will review how the CMB and 21cm can be used to study dark matter (DM) properties, as well as sources of exotic (early) reionization. I will first discuss how the CMB can provide strong constraints on scattering between DM and baryons, and probe the parameter space suggested by the EDGES anomaly. I will then introduce models that could reconcile the EDGES anomaly while being consistent with CMB observations. Secondly, I will explain how the CMB can be used to probe the existence of extra sources of ionization and heating, and compare existing constraints to what future 21cm experiment could do. I will also discuss the status in the Planck 2018 data of a hint for early exotic reionization originally suggested in earlier Planck release.

      Speaker: Prof. Vivian Poulin (Montpellier Univ. )
    • 4
      Neutrinos at 21 cm
      Speaker: Prof. Silvia Pascoli (Durham University )
    • 10:45
      coffee break
    • 5
      TBA
      Speaker: Prof. Maria Archidiacono (Bologna Univ. )
    • BSM Pitching Session

      Short contributions (~ about 20 minutes) and discussion

      • 6
        TBA
        Speaker: Prof. Laura Lopez-Honorez (Brussels Univ)
      • 7
        TBA
        Speaker: Dr Sam Witte (Valencia Univ.)
      • 15:00
        Discussion session
    • 15:30
      coffee break
    • 8
      Colloquium
      Speaker: Prof. Lesgourgues Julien (RWTH Aachen U.)
    • 9
      TBA
      Speaker: Prof. Saleem Zaroubi (University of Groningen)
    • 10:45
      coffee break
    • 10
      Modeling the 21-cm signal from the Cosmic Dawn

      The birth of the first stars, black holes and galaxies heralded the end of the cosmic Dark Ages and the beginning of the Cosmic Dawn. The light from these objects heated and ionized almost every atom in existence, culminating in the Epoch of Reionization: the final major phase change of the Universe. This final frontier of astrophysical cosmology is undergoing a transition from an observationally-starved epoch to a "Big Data" field. This process is set to culminate with upcoming Square Kilometre Array interferometric observations of the redshifted 21-cm line: providing a 3D map of the first billion years of our Universe. With the SKA, we will be able to actually study the UV and X-ray properties of the first galaxies, as well as physical cosmology, which are encoded in the large-scale structure of the 21-cm signal.
      I will review the current status of observations of the EoR and Cosmic Dawn, before discussing the main challenges in modeling the 21-cm signal: a huge range of relevant scales and a large parameter space of astrophysical uncertainties. I will review how simulations have adapted to address these challenges. Finally, I will introduce a Bayesian forward-modeling framework capable of on-the-fly sampling of 3D simulations, allowing us to simultaneously infer the properties of the unseen first galaxies and physical cosmology encoded in the 21-cm signal.

      Speaker: Prof. Andrei Mesinger (Scuola Normale Superiore)
    • Experimental Challenges at 21 cm
      • 11
        TBA
        Speaker: Prof. Gianni Bernardi (INAF)
      • 12
        TBA
        Speaker: Dr Marta Spinelli (INAF)
      • 15:00
        Discussion session
    • 15:30
      coffee break
    • BSM Pitching Session

      Short contributions (~ about 20 minutes) and discussion

      • 13
        TBA
        Speaker: Dr Hongwan Liu (NYU-Princeton)
      • 10:00
        Discussion session
    • 10:45
      coffee break
    • BSM Pitching Session

      Short contributions (~ about 20 minutes) and discussion

      • 14
        TBA
        Speaker: Dr Anastasia Sokolenko (Vienna Univ. )
      • 11:45
        Discussion session