XXIV SIGRAV Conference on General Relativity and Gravitation

Session

Cosmology

6

9 Sept 2021, 09:00

Urbino/Palazzo Battiferri

Conveners

Cosmology

• Gabriele Gionti, S.J. (Vatican Observatory (Specola Vaticana))

34. Primordial gravitational waves from CMB - observational perspectives

Prof. Francesco Piacentini

09/09/2021, 09:00

I will briefly review the impact of primordial gravitational waves into CMB polarization, and present some of the observational efforts in which I am involved.
I will describe the observational target and the most relevant measurement issues due to sensitivity, foreground emission and systematic effects.
In particular I will focus on the LSPE ground+balloon experiment, and on the LiteBIRD...

35. Neutrino Cosmology: current status and future prospects

Prof. Martina Gerbino

09/09/2021, 09:30

Neutrino unknowns are clear gateways to new physics. Cosmology offers a
unique arena to unveil neutrino secrets in a way that is separate from,
but complementary to astrophysical and terrestrial searches. The next
generation of cosmological surveys will supersede the current, which is
already highly sensitive to neutrino fundamental properties. I will
present the state of the art,...

36. Models of galaxy formation and evolution constrained by gravitational-wave events

Luca Graziani

09/09/2021, 10:00

The recent detection of gravitational waves (GW) by the LIGO/VIRGO Collaboration opened a new era of gravitational astronomy with an unavoidable impact on theoretical models of galaxy formation and evolution. The astrophysical nature and origin of compact objects generating GW events are in fact deeply connected with the property of the galactic environment in which their stellar progenitors...

55. Cosmology with LIGO/Virgo dark sirens and galaxy catalogs

Francesco Iacovelli (Université de Genève)

09/09/2021, 11:00

Gravity theory

We will briefly present a detailed study of the methodology for correlating ‘‘dark sirens'' (compact binaries coalescences without electromagnetic counterpart) with galaxy catalogs. Several improvements on the current state of the art will be examined and applied to the published LIGO/Virgo gravitational wave (GW) detections, studying several sources of systematic errors. We will give the best...

65. Primordial black hole formation

Ilia Musco (Istituto Nazionale di Fisica Nucleare)

09/09/2021, 11:30

Gravity theory

Primordial black holes can form in the early Universe from the collapse of cosmological perturbations after the cosmological horizon crossing. They are possible candidates for the dark matter as well as for the seeds of supermassive black holes observed today in the centre of galaxies. In calculations of spherically symmetric collapse, a Lagrangian relativistic hydrodynamical code is used to...

49. FLRW quantum cosmology from a tomographic point of virw

Cosimo Stornaiolo (Istituto Nazionale di Fisica Nucleare)

09/09/2021, 12:00

Gravity theory

The introduction of a perfect fluid source in quantum cosmological models has permitted to write down the Wheeler De Witt equation in a form similar to the Schroedinger equation, by the introduction of a fiducial time. In the first part of the talk I introduce the formalism and discuss the nature of this fiducial time. In the second part I introduce the corresponding tomograms in order to...