BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Constraining primordial gravitational wave amplitude and de-lensin g of CMB maps - influence of Galactic foregrounds DTSTART;VALUE=DATE-TIME:20260916T100500Z DTEND;VALUE=DATE-TIME:20260916T103000Z DTSTAMP;VALUE=DATE-TIME:20260922T142645Z UID:indico-contribution-5701-31286@indico.ific.uv.es DESCRIPTION:Speakers: Pawel Bielewicz (National Centre for Nuclear Researc h)\nDetecting primordial gravitational waves (PGWs) is one of the main goa ls for upcoming Cosmic Microwave Background (CMB) experiments. Achieving t his objective requires precise removal of the CMB gravitational lensing si gnal from polarisation maps -- so-called de-lensing -- as well as cleaning the maps from diffuse Galactic foregrounds. In this talk\, I will present studies on influence of the Galactic emission on the reconstruction of th e CMB lensing potential and de-lensing of the divergence-free component of CMB polarization maps. Using realistic foreground models of varying compl exity\, we test the sensitivity of constraints on the primordial gravitati onal wave amplitude and the $\\sigma_8$ parameter to residual Galactic con tamination and its interplay with de-lensing. Our results highlight that p recise modelling and removal of Galactic emission will be crucial for reli ably estimating the amplitude and $\\sigma_8$ parameter in next-generation CMB experiments.\n\nhttps://indico.ific.uv.es/event/8160/contributions/31 286/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31286/ END:VEVENT BEGIN:VEVENT SUMMARY:Systematic uncertainties in optimal de-lensing of CMB B modes with cross-correlation of CMB and galaxy survey DTSTART;VALUE=DATE-TIME:20260916T094000Z DTEND;VALUE=DATE-TIME:20260916T100500Z DTSTAMP;VALUE=DATE-TIME:20260922T142645Z UID:indico-contribution-5701-31287@indico.ific.uv.es DESCRIPTION:Speakers: Kishan Deka ()\nIn the era of high-precision Cosmic Microwave Background (CMB) anisotropy measurements\, detection of primordi al gravitational waves (PGWs) will be one of the main goals of current CMB experiments. Detection of a divergence-free (B-mode) component in CMB pol arisation will provide direct evidence of inflationary PGWs in the early u niverse. However\, weak gravitational lensing of CMB photons due to interv ening mass distributions of the Universe distorts the primordial polarisat ion patterns\, introducing an additional lensing-induced B-mode signal. Re moving these lensing-induced B-modes is essential for improving constraint s on the amplitude of PGWs. In this work\, we test a tomographic delensing method on simulations of the Rubin Observatory LSST galaxy catalogue and Simons Observatory (SO) CMB maps. A significant improvement in delensing e fficiency is achieved by using a multi-tracer approach\, where we split th e galaxy dataset into tomographic redshift bins. However\, uncertainties i n photometric redshift measurements pose a problem for optimal weighting o f the tracers. We explore the impact of photometric redshift errors with r ealistic simulations and build a pipeline to propagate these uncertainties to constraints on the amplitude of primordial gravitational waves. Additi onally\, we explore constraints on the galaxy bias\,b(z)\, and the amplitu de of matter fluctuations parameter\,σ8\, through tomographic cross-corre lations using realistic simulations of photometric measurements from LSST 10-year datasets.\n\nhttps://indico.ific.uv.es/event/8160/contributions/31 287/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31287/ END:VEVENT BEGIN:VEVENT SUMMARY:Cobaya development updates DTSTART;VALUE=DATE-TIME:20260916T090000Z DTEND;VALUE=DATE-TIME:20260916T094000Z DTSTAMP;VALUE=DATE-TIME:20260922T142645Z UID:indico-contribution-5701-31291@indico.ific.uv.es DESCRIPTION:Speakers: Jesus Torrado (Instituto de Estructura de la Materia (IEM-CSIC))\nhttps://indico.ific.uv.es/event/8160/contributions/31291/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31291/ END:VEVENT BEGIN:VEVENT SUMMARY:Coffee Break DTSTART;VALUE=DATE-TIME:20260916T083000Z DTEND;VALUE=DATE-TIME:20260916T090000Z DTSTAMP;VALUE=DATE-TIME:20260922T142645Z UID:indico-contribution-5701-31290@indico.ific.uv.es DESCRIPTION:https://indico.ific.uv.es/event/8160/contributions/31290/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31290/ END:VEVENT BEGIN:VEVENT SUMMARY:Revisiting the Hubble Constant with FRBs: Evidence for Redshift Ev olution DTSTART;VALUE=DATE-TIME:20260916T080500Z DTEND;VALUE=DATE-TIME:20260916T083000Z DTSTAMP;VALUE=DATE-TIME:20260922T142645Z UID:indico-contribution-5701-31289@indico.ific.uv.es DESCRIPTION:Speakers: Surajit Kalita (University of Warsaw)\nFast Radio Bu rsts (FRBs) are millisecond radio transients with high dispersion measures \, making them powerful tracers of ionized matter across cosmological dist ances. In this talk\, I will present two complementary approaches\, Bayesi an analysis and machine learning\, applied to a set of localized FRBs to r igorously test the consistency of the $\\Lambda$CDM model at late cosmic e poch. Our results reveal a redshift evolution of the Hubble constant\, a b ehavior that stands in contradiction to the core postulate standard cosmol ogy. I will further show that this discrepancy can be resolved for alterna te cosmological models. These findings suggest a fundamental inadequacy in the standard cosmological framework and necessitate a deeper revision of the theoretical underpinnings of cosmology to resolve the Hubble tension.\ n\nhttps://indico.ific.uv.es/event/8160/contributions/31289/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31289/ END:VEVENT BEGIN:VEVENT SUMMARY:Geometric Constraints on the Pre-Recombination Expansion History f rom the Hubble Tension DTSTART;VALUE=DATE-TIME:20260916T074000Z DTEND;VALUE=DATE-TIME:20260916T080500Z DTSTAMP;VALUE=DATE-TIME:20260922T142645Z UID:indico-contribution-5701-31288@indico.ific.uv.es DESCRIPTION:Speakers: Davide Pedrotti (TIFPA-INFN\, Università di Trento) \nI perform a model-independent reconstruction of the background pre-recom bination expansion history of the Universe. I find that purely early-time resolutions to the Hubble tension\, satisfying the geometric CMB constrain ts\, exist at the background level. This class of solutions requires a smo oth transition around matter-radiation equality\, characterized by a ≃15 % expansion rate enhancement prior to recombination. This result serves as a blueprint for future model-building approaches\, providing a background stress-test for Hubble tension proposals.\n\nhttps://indico.ific.uv.es/ev ent/8160/contributions/31288/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31288/ END:VEVENT BEGIN:VEVENT SUMMARY:H0 (+other things) from GW Sirens DTSTART;VALUE=DATE-TIME:20260916T070000Z DTEND;VALUE=DATE-TIME:20260916T074000Z DTSTAMP;VALUE=DATE-TIME:20260922T142645Z UID:indico-contribution-5701-31285@indico.ific.uv.es DESCRIPTION:Speakers: Tessa Baker (University of Portsmouth)\nhttps://indi co.ific.uv.es/event/8160/contributions/31285/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31285/ END:VEVENT END:VCALENDAR