From Planck to the future of CMB

23 May 2022, 08:30 → 27 May 2022, 13:00 Europe/Rome

Aula Magna, Palazzo Mosti (Ferrara)

Go back to the main “from Planck to the future of CMB” website

Monday 23 May

08:30 Registration opens

09:30 Open Coffee – Palazzo Giordani

Science Challenges

Convener: Prof. Bruce Partridge (Haverford College)

1 Welcome and foreword from Laura Ramaciotti (Rector of the University of Ferrara), Vincenzo Guidi (Director of Department of Physics and Earth Sciences - UniFe), Roberto Calabrese (Director of INFN Ferrara)

2 Ludovic Montier and Jan Tauber: objectives of the workshop

4-5 - Montier_Tauber_SOC_Introduction.pdf

3 Paolo Natoli: logistic information

06 - Natoli_LOC_Introduction_V3.pdf

4 Reno Mandolesi and Jean-Loup Puget: setting the context

07 - Mandolesi.pdf

08 - J-L_Puget-Planck HFI legacy for the future.pdf

5 Invited talk by Jo Dunkley (Princeton University) on "Key future science goals from the CMB"

There is still a great deal to be learnt from CMB measurements. I will give an overview of science that the community hope to do with new data, from testing initial conditions of the universe to probing the dark sector and better understanding cosmic reionization and galaxy evolution. I will also describe some of the rich millimeter-wave science that can be done with these datasets, including time-domain astrophysics.

09 - dunkley_ferrara_may23.pdf

6 Invited talk by Tomotake Matsumura (Kavli IPMU Tokyo) on "Scientific challenges expected from future space experiments"

The measurement of cosmic microwave background (CMB) from space is ideal for the entire sky access and broad observational frequency coverage. The past CMB satellite missions, COBE, WMAP, and Planck, play crucial roles in establishing modern cosmology. Now next-generation satellite missions will aim for even more demanding scientific goals, and the various corresponding requirements on the mission become stringent. In this talk, we will review the achievements and lessons learned from the past CMB space missions. With these heritages in the community, I will try projecting the upcoming challenges and make a bridge to the rest of the talks in this workshop.

10 - Tomotake.pdf

7 Invited talk by Suzanne Staggs (Princeton University) on "Scientific challenges expected from future ground experiments"

11 - Staggs-Ferrara-May-2022-v2.pdf

8 Invited talk by Paolo de Bernardis (Rome Sapienza University) on "Scientific challenges expected from future balloon experiments"

12 - De Bernardis.pdf

13:00 Lunch

13:30 Poster viewing

CMB, Cross-Correlation and Galactic Science

Convener: Jan Tauber (European Space Agency)

9 Invited talk by Anthony Challinor (Cambridge University) on "CMB probes of cosmological inflation: current status and future prospects"

The temperature and polarisation anisotropies of the CMB offer our most direct view of the early universe and their observation has, and continues to be, critical in constraining early-universe models. In this talk, I will review the key ways that the CMB constrains the properties of the primordial fluctuations, which were likely produced during an early period of cosmological inflation, and the implications of current constraints for models of inflation. I will also discuss some of the challenges faced in these measurements and review the prospects of forthcoming CMB experiments to advance our understanding of inflation.

13 - Challinor_Ferrara2022.pdf

Beams

Convener: Jan Tauber (European Space Agency)

10 Invited talk by Jon Gudmundsson (Stockholm University) on "Knowing your beams"

The cosmic microwave background (CMB) has played a foundational role in the establishment of the standard model of cosmology. Driven by significant technological advances, future CMB experiments aim to make dramatic strides in our understanding of the universe. Some of our most ambitious efforts, however, run the risk of being hamstrung by poorly-understood instrument effects, systematics. A commonly-discussed class of systematic effects relate to our optical systems in one way or another. In this talk, I will review some of the challenges that past CMB missions have faced and highlight lessons learned. I will present algorithms that have been developed to help us understand the impact of optical non-idealities and summarize key results from the applications of those. I will conclude by reviewing some of the challenging calibration requirements for upcoming missions and discuss how the community can work towards meeting those.

14 - Jon Gudmundsson

14 - Jon Gudmundsson.pdf

11 Clara Vergès (Harvard CfA) "Beam calibration campaign requirements to control temperature-to-polarisation leakage for CMB-Stage 4"

15 - Vèrges - CMB S4 beam calibration.pdf

12 Clément Leloup (APC Paris) "Study of beam side-lobes systematics and calibration for the LiteBIRD mission"

16 - Leloup_Ferrara_beamsFSL-2022.pdf

13 Emilie Storer (Princeton University) "Map-making and Beams for the Atacama Cosmology Telescope"

17 - Storer Emilie.pdf

16:20 Coffee Break

Detectors and Beams

Convener: Marco Bersanelli (Università degli Studi di Milano)

14 Invited talk by Hannes Hubmayr (NIST Boulder) on "The shape of CMB focal planes to come"

The tantalizing science reach of CMB observations has driven remarkable innovation in superconducting detectors. Roughly two decades ago, CMB focal planes consisted of a few individually assembled detection channels. By use of modern micro-fabrication equipment and improved microwave design tools, today’s imaging focal planes consist of multiple-tiled, large-format wafers. A wafer may contain hundreds of spatial pixels, each an integrated superconducting circuit capable of polarization diplexing and power sensing in multiple frequency channels. In this talk I will present the current CMB focal plane landscape, including the various optical coupling, sensing, and multiplexing techniques in use. Attention will be given to the formidable scaling challenge of near-term ground-based observations. Lastly, I will offer my opinion on what future focal plane developments would be most impactful for future ground and space-based CMB instruments.

18 - hubmayr_ferrera_2022.pdf

15 Guillermo Pascual Cisneros (IFCA Santander) "Optimization of a microwave polarimeter for astronomy with optical correlation and detection"

19 - Pascual.pdf

16 Nadia Dachlythra (Oskar Klein Stockholm) "Optical calibration simulations for the Simons Observatory"

20 - Nadia_Dachlythra_Beam_characterization_for_the_Simons_Observatory_Small_Aperture_telescopes.pdf

17 Discussion (Jon Gudmundsson, Hannes Hubmayr)

Tuesday 24 May

Data Calibration and Characterization

Convener: Ludovic Montier (IRAP)

18 Invited talk by Charles R. Lawrence (NASA/JPL) on "Lessons from Planck Calibration for Future CMB Experiments"

Planck set new standards for calibration of CMB experiments. That was hard. Calibration of future experiments, which will require map noise levels of nanokelvin or better, will be much harder. I will discuss lessons learned in calibrating Planck for future experiments.

01_Lessons from Planck Calibration for Future Experiments.pdf

19 Nicholas Galitzki (UCSD) "The Characterization and Calibration of the Simons Observatory Small Aperture Telescope: Status and future plans"

02 - SOSAT_Progress_and_Calibration_FerraraCMB_20220524_SHORT.pdf

20 Kirit Karkare (Chicago University) "Calibration and Systematics for the CMB-S4 Inflation Survey Small Aperture Telescopes"

03 - Karkare 20220524_Karkare_Ferrara_aspresented.pdf

21 Enrique Martínez-González (IFCA Santander) "Polarization angle requirements for CMB B-mode experiments. Application to the LiteBIRD satellite"

04_polar-angle-requirements_EMG.pdf

10:40 Coffee Break

Data Calibration and Characterization

Convener: Ludovic Montier (IRAP)

22 Gabriele Coppi (INFN Milan) "PROTOCALC: Design and Simulation of a Calibration Source for mm Telescopes"

05 - _Ferrara_PlanckConference.pdf

23 Discussion (Daniele Mennella, Tomotake Matsumura)

CMB, Cross-Correlation and Galactic Science

Convener: Ludovic Montier (IRAP)

24 Invited talk by Stephan Ilic (IJC Lab Paris) on "The history of reionisation : peering through the dark ages with the CMB"

Observations of the cosmic microwave background provide us with a unique window on the early Universe, and great new insights are expected from the next generation of dedicated ground and space telescopes. While probing the elusive inflationary epoch may be the most sought-after objective of those missions, they will also shed some light on another poorly-known era of the early Universe: the reionisation era. In this talk, after recalling the essentials of the reionisation epoch, I will review the methodologies used and state-of-the-art constraints derived from current data. I will then focus on the future of reionisation studies, detailing forecasts and new probes remaining to be exploited.

06 - Ilic_CMB_Ferrara.pdf

12:30 Lunch

13:30 Poster viewing

CMB, Cross-Correlation and Galactic Science

Convener: Matthieu Tristram (IJClab, CNRS, France)

25 Invited talk by Massimiliano Lattanzi (INFN Ferrara) on "Particle and energy composition of the Universe: Neutrinos, Light relics and Dark Matter"

The interaction between cosmology and particle physics has always been very fruitful. Cosmological observations provide a powerful mean to test particle physics theories, and to measure the properties of existing particles like neutrinos. At the same time, the solution to two long-standing mysteries in cosmology - the origin of dark matter and dark energy - might lie in physics beyond the standard model of particles. In my talk I will review what we have learned from cosmological observations of the recent past, especially Planck's, on light relics (including neutrinos) and dark matter, and discuss prospects for future experiments.

07-Lattanzi.pdf

Systematics impact on large angular scale science

Convener: Matthieu Tristram (IJClab, CNRS, France)

26 Invited talk by Loris Colombo (Milan University) on "Lessons learned from Planck for cosmology from large angle polarization"

08 - Colombo.pdf

27 Roger de Belsunce (Cambridge University) "Cosmological inference from large-angular scale CMB data"

09 - Belsunce_Ferrara_2022.pdf

28 Dominic Beck (Stanford University) "Cosmological constraints and instrumental systematics studies using line-of-sight distortion fields with BICEP/Keck and beyond"

10 - beck_distortionfields_v2.pdf

29 Sofia Fatigoni (UBC) "High Resolution analysis of the South Pole Atmosphere for CMB observations"

11-SofiaFatigoni_PlanckFerrata_SPole_Atmo.pdf

16:20 Coffee Break

Systematics impact on large angular scale science

Convener: Matthieu Tristram (IJClab, CNRS, France)

30 Giulio Fabbian (CCA Flatiron Institute) "Challenges for high precision lensing reconstruction"

12-fabbian_future_cmb_ferrara_2022.pdf

31 Baptiste Jost (APC Paris) "Novel method for joint systematic correction and foreground cleaning and its application to the estimation of cosmic birefringence in Simons Observatory"

13-BaptisteJost_Ferrara.pdf

32 Patricia Diego-Palazuelos (IFCA Santander) "Simultaneous determination of miscalibrated polarization angles and cosmic birefringence from Planck PR4"

14 - PatriciaDiego_CosmicBirefringence.pdf

33 Discussion (Matthieu Tristram, Loris Colombo)

18:10 Poster + Aperitivo

Wednesday 25 May

Foregrounds

Convener: Carlo Baccigalupi (SISSA)

34 Invited talk by Nicoletta Krachmalnicoff (SISSA) on "Characterization of Foreground emission for CMB experiments: current status and future prospective"

In the recent years it has become clear how the contamination coming from Galactic and extra-Galactic emissions represents one of the main limiting factor for any new science achievable with Cosmic Microwave Background observations. Having a thorough understanding of the foreground properties is therefore fundamental in order to achieve a reliable reconstruction of the clean CMB signal and to constrain its cosmological properties. In this talk I will review the current status of knowledge and characterization of foregrounds, focusing in particular Galactic polarized emission. I will summarize the main results from the latest analysis of available multi-frequency data, highlighting which are the main limitations in our current models and how we can overcome them in view of future CMB experiments.

01 - Foregrounds_Ferrara_May22.pdf

35 Invited talk by Mathieu Remazeilles (IFCA Santander) on "Next steps in component separation for new CMB observables"

Beyond the significant legacy of the ESA's Planck mission, the cosmic microwave background (CMB) radiation carries much more information that remains to be exploited in the coming decades. Next-generation CMB experiments of unprecedented sensitivity are being planned to extract and interpret new cosmological observables out of future CMB data. Among these new, yet undetected, cosmological observables is the primary CMB B-mode polarization signal, but also secondary distortions to CMB anisotropies caused by the cosmic web, such as the relativistic SZ effect. A common aspect of these new cosmological signals is their very faint signature, furthermore obscured by intense astrophysical foreground emissions, which makes their recovery much more sensitive to foreground mismodeling, while the exact spectral properties of the foregrounds are also poorly known at the sensitivity levels required for these signals. I will discuss the problem of foregrounds and component separation for the search for such faint cosmological signals, and emphasize specific challenges in this context: foreground mismodeling, foreground spectral distortions, and spectral degeneracies versus frequency coverage. I will also present some recent developments in component separation which rely on statistical moment expansion of the foreground emission, and show how this offers an interesting avenue to overcome these new challenges.

Remazeilles_ferrara2022.pdf

36 Niall Jeffrey (UCL) "Single frequency CMB B-mode inference with realistic foregrounds from a single training image"

03 - nialljeffrey_Ferrara_2022.pdf

37 Elena de la Hoz (IFCA Santander) "Diffuse polarized foregrounds from component separation with QUIJOTE-MFI"

04 - delahoz_from_planck_to_the_future_of_CMB.pdf

10:40 Coffee Break

Foregrounds

Convener: Carlo Baccigalupi (SISSA)

38 Benjamin Beringue (Cardiff University) "Component separation for the Simons Observatory Large Aperture Telescope"

05 - Beringue.pdf

39 Alessia Ritacco (INAF OAC) "First low latitudes reconstruction of the dust polarization spectral energy distribution variation"

06 - Ritacco talk_from_planck_to_future_AR.pdf

40 Giuseppe Puglisi (Tor Vergata University) "Foreground Removal for B-Modes Detection with Clustering Methods"

07 - Puglisi ferrara_052322.pdf

41 Brandon Hensley (Princeton University) "Beyond Foregrounds: Galactic Science in the 2020s"

08 - Hensley ferrara.pdf

42 Discussion (Carlo Baccigalupi, Nicoletta Krachmalnicoff, Mathieu Remazeilles)

12:50 Free or Excursion to Museo Ferrari

Thursday 26 May

Data Analysis Interdependencies

Convener: Paolo Natoli

43 Invited talk by Reijo Keskitalo (LBNL) on "Integrated data analysis and end-to-end simulations"

All data analysis for an experiment is, at least implicitly, integrated. It all aims to distill scientific knowledge from a common data set. Whether the architects of the data reduction pipelines make the integration explicit is influenced by external constraints (processing power, availability of accurate models) and design strategy (highly modular or tightly coupled). Regardless of the case, need for faithful simulations of the deliverable data set often lead to end-to-end simulations that end up integrating all of the analysis modules together. In my talk I will review the data reduction and end-to-end simulation strategies employed in the production of Planck public data releases, discuss the importance of integrating simulations into early development work and make connections with the next generation CMB experiments that are right now designing their data analysis pipelines.

01 - Reijo - Integrated data analysis and end-to-end Simulations.pdf

44 Mathew Galloway (Oslo University) "BeyondPlanck – Bayesian end-to-end Analysis of Planck LFI"

02 - Galloway - Ferrara Talk.pdf

45 Ian Harrison (Cardiff University) "SO Likelihood Codes for CMB Combined Probes"

03 - ianharrison_so_likelihood.pdf

46 Erik Rosenberg (Cambridge University) "CMB power spectra and cosmological parameters from Planck PR4 (NPIPE) with CamSpec"

04 - Rosenberg_ferrara20220526.pdf

10:40 Coffee Break

Data Analysis Interdependencies

Convener: Paolo Natoli

47 Gabriel Jung (Padova University) "The integrated angular bispectrum of the CMB"

05 - jung_integrated_bispectrum.pdf

48 Adriaan Duivenvoorden (Princeton University) "The Atacama Cosmology Telescope: science and analysis pipeline"

06 - Adriaan Duivenvoorden 20220526_ferrrara.pdf

49 Etienne Camphuis (IAP Paris) "Building an accurate analytical power spectrum covariance matrix on a small survey area"

07 - Camphuis 20220526_ferrara.pdf

50 Discussion (Paolo Natoli, Reijo Keskitalo)

DA_questions.pdf

12:30 Lunch

13:30 Poster viewing

CMB, Cross-Correlation and Galactic Science

Convener: Erminia Calabrese (Cardiff University)

51 Invited talk by Jia Liu (Kavli IPMU Tokyo) on "Simulating correlated CMB and large-scale structure observables"

We are expecting high-precision observations from upcoming CMB surveys, such as the Simons Observatory, CMB-S4, and LiteBIRD, as well as from future surveys of the large-scale structure, such as Euclid, Rubin LSST, SPHEREx, PSF, and Roman Space Telescope. Most of the observables from these independent surveys will be correlated due to their large overlaps in sky and redshift coverage. Joint analysis of CMB and LSS surveys will allow us to increase the overall signal, break degeneracies, mitigate systematics, and potentially probe new science. In this talk, I will discuss the possible paths to simulate correlated CMB and LSS observables to achieve these scientific goals.

08 - JiaLiu_Ferrara_May26_2022.pdf

52 Mathew Madhavacheril (USC) "Cosmology with CMB Lensing: ACT, SO and beyond"

09 - Ferrara_Lensing_Madhavacheril_v2.pdf

53 Laura Salvati (IAS Orsay) "Galaxy clusters in the mm wavelengths: cosmological analysis and future perspectives"

10 - Salvati.pdf

54 Federica Guidi (IAP Paris) "Cosmology from SPT-3G"

11 - Guidi_CMBFerrara.pdf

55 Vincent Pelgrims (Crete University) "Pasiphae: Goal and overview of current status"

12 - Pelgrims_Ferrara_presentation.pdf

16:00 Coffee Break

CMB, Cross-Correlation and Galactic Science

Convener: R. Belen Barreiro (IFCA (CSIC-UC))

56 Invited talk by Aditya Rotti (Manchester University) on "Spectral distortion science and measurement challenges"

13 - Ferrara_Rotti.pdf

Experimental results

Convener: R. Belen Barreiro (IFCA (CSIC-UC))

57 Angela Taylor (Oxford University) "The C-Band All-Sky Survey: Northern sky-survey results"

14 - Taylor CBASS_Ferrara_May2022.pdf

58 Kirit Karkare (Chicago University) "The BICEP/Keck program: latest results and progress update on the upcoming BICEP Array receiver deployments"

15 - Karkare 20220526_Karkare_Ferrara_aspresented.pdf

59 Jose Alberto Rubino-Martin (IAC Tenerife) "The QUIJOTE MFI wide survey: A northern sky survey in intensity and polarization at 10–20GHz"

16 - RubinoMartin_QUIJOTE-Ferrara-May2022.pdf

60 Elle Shaw (UIUC) "Limits on Cosmological B-mode Polarization in the CMB from Spider"

17 - Shaw_FerraraConference_SPIDER.pdf

Friday 27 May

Future Plans

Convener: Charles R. Lawrence (NASA/JPL)

61 Invited talk by François R. Bouchet (IAP Paris) on "Introduction to future experiments"

01_2022.05 FRB@Ferrare-Z.ppsx

62 Invited talk by Masashi Hazumi (KEK Tsukuba) on "LiteBIRD"

02 - Hazumi LiteBIRD_FP2FC_tmv02.pdf

63 Invited talk by Jens Chluba (Manchester University) on "Ongoing and planned CMB spectrometers and what we still need to make this happen"

CMB spectral distortion measurements are going to be challenging and multiple groups are considering experimental approaches that might allow us to target these small signals in the near and distant future. In my talk I will give a brief overview of all the ongoing and planned CMB spectrometer concepts and initiatives trying in particular to highlight synergies and individual strengths. I will then address the question about what is still needed for us to take major steps forward and how we might start to get organized with this ambitious goal.

03 - Chluba_Ferrara.pdf

64 Invited talk by Julian Borrill (LBNL) on "From Stage 3 to Stage 4 - South Pole Observatory, Simons Observatory and CMB-S4"

Ground-based CMB experiments are evolving from fielding thousands of detectors on telescope(s) of a single size at a single observing site in the last decade (eg. the Atacama Cosmology Telescope, BICEP/Keck, Polarbear/Simons Array, and South Pole Telescope), through tens of thousands of detectors on telescopes of multiple sizes at a single observing site in this decade (the South Pole Observatory and Simons Observatory), culminating in hundreds of thousands of detectors on telescopes of multiple apertures at multiple observing sites in the next decade (CMB-S4). In this talk I will describe the scientific, technical, and organizational drivers and challenges in this evolution.

04 - Borrill.pdf

10:30 Coffee Break

Future Plans

Convener: Charles R. Lawrence (NASA/JPL)

65 Invited talk by Mark Devlin (UPenn) on "All the Way from Earth to Space. How Earth-based, sub-orbital, and space missions are complimenting each other with precision measurements of the millimeter sky"

05 - Devlin.pdf

66 Discussion EOM (Charles R. Lawrence, Francois R. Bouchet)

06_Discussion slide Friday.pdf