BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Is the Hubble tension a mystery of the small-scale Universe? DTSTART;VALUE=DATE-TIME:20260915T091000Z DTEND;VALUE=DATE-TIME:20260915T095000Z DTSTAMP;VALUE=DATE-TIME:20260922T142637Z UID:indico-contribution-5698-31275@indico.ific.uv.es DESCRIPTION:Speakers: Jens Chluba (University of Manchester)\nhttps://indi co.ific.uv.es/event/8160/contributions/31275/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31275/ END:VEVENT BEGIN:VEVENT SUMMARY:Coffee Break DTSTART;VALUE=DATE-TIME:20260915T084000Z DTEND;VALUE=DATE-TIME:20260915T091000Z DTSTAMP;VALUE=DATE-TIME:20260922T142637Z UID:indico-contribution-5698-31274@indico.ific.uv.es DESCRIPTION:https://indico.ific.uv.es/event/8160/contributions/31274/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31274/ END:VEVENT BEGIN:VEVENT SUMMARY:AMICO galaxy clusters in KiDS-1000: cosmological constraints from the two-point correlation function DTSTART;VALUE=DATE-TIME:20260915T101500Z DTEND;VALUE=DATE-TIME:20260915T104000Z DTSTAMP;VALUE=DATE-TIME:20260922T142637Z UID:indico-contribution-5698-31271@indico.ific.uv.es DESCRIPTION:Speakers: Massimiliano Romanello (University of Bologna)\nWe study the clustering of an optically identified galaxy cluster catalogue f rom the fourth data release of the Kilo Degree Survey (KiDS-1000). The pho tometric sample was identified by the Adaptive Matched Identifier of Clust ered Objects (AMICO) algorithm and consists of 9049 clusters with $S/N\\ge q3.5$\, in redshift range $0.1\\leq z\n\nhttps://indico.ific.uv.es/event/8 160/contributions/31271/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31271/ END:VEVENT BEGIN:VEVENT SUMMARY:CORN - Chronometers Of Relic Nature: Estimate of the expansion rat e of the Universe using compact relic galaxies DTSTART;VALUE=DATE-TIME:20260915T081500Z DTEND;VALUE=DATE-TIME:20260915T084000Z DTSTAMP;VALUE=DATE-TIME:20260922T142637Z UID:indico-contribution-5698-31272@indico.ific.uv.es DESCRIPTION:Speakers: Krzysztof Lisiecki (National Centre for Nuclear Rese rach\, Poland)\nThe persistent discrepancy between the locally measured Hu bble constant\, derived from Cepheids and Type Ia supernovae\, and the val ue inferred from the cosmic microwave background underscores the need for independent cosmological probes. Cosmic chronometers provide a direct\, mo del-independent measurement of the expansion history\, but their accuracy is currently limited by systematic uncertainties in stellar population mod elling\, particularly when the full red and quiescent population is used. \nI propose an alternative chronometer strategy based on relic galaxies: t he oldest\, most compact\, and most dynamically evolved systems at a given epoch. These galaxies are expected to host uniformly old\, rapidly formed stellar populations with minimal subsequent mass growth\, making them clo ser to ideal single-burst populations. By focusing on this population\, we can reduce uncertainties associated with composite star formation histori es and mitigate biases arising from late-time rejuvenation.\nIn this work I use the largest catalogue of relics\, to construct a cleaner differentia l age–redshift relation. Particular emphasis will be placed on assessing the limitations of current single stellar population models\, including m etallicity\, initial mass function\, and alpha-enrichment. By quantifying how these ingredients affect absolute and differential age estimates\, we aim to establish a more robust systematic floor for the chronometer method . A relic-based approach has the potential to tighten stellar age constrai nts at fixed redshift\, refine the expansion history measurement\, and pro vide an independent perspective on the Hubble tension.\n\nhttps://indico.i fic.uv.es/event/8160/contributions/31272/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31272/ END:VEVENT BEGIN:VEVENT SUMMARY:New Constraints on the Varying Electron Mass Solution to the Hubbl e Tension DTSTART;VALUE=DATE-TIME:20260915T095000Z DTEND;VALUE=DATE-TIME:20260915T101500Z DTSTAMP;VALUE=DATE-TIME:20260922T142637Z UID:indico-contribution-5698-31273@indico.ific.uv.es DESCRIPTION:Speakers: Yo Toda (Kochi University of Technology)\nDespite it s remarkable success\, the standard cosmological model\, $\\Lambda$CDM\, f aces several serious challenges. Among them\, the “Hubble tension”—t he discrepancy between the value of the Hubble constant inferred from obse rvations of the early Universe and that obtained directly from local measu rements—is one of the most important problems in modern cosmology. As a possible solution to this tension\, models in which the electron mass vari es with time around the epoch of recombination have been proposed.\n\nIn t his talk\, I will provide an overview of how a time-varying electron mass modifies the recombination history and affects the sound-horizon scale\, t hereby potentially alleviating the Hubble tension. I will then present the observational constraint $\\frac{m_e}{m_{e\,0}} = 1.0101 \\pm 0.0046$\, o btained using the Markov Chain Monte Carlo code COBAYA from a combined ana lysis of the latest cosmic microwave background data from Planck\, baryon acoustic oscillation data from DESI\, and Type Ia supernova data from Pant heon+. Finally\, I will discuss the physical implications of this result.\ n\nhttps://indico.ific.uv.es/event/8160/contributions/31273/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31273/ END:VEVENT BEGIN:VEVENT SUMMARY:Evidence of deviations from LCDM from a new Hubble Diagram of Qua sars DTSTART;VALUE=DATE-TIME:20260915T075000Z DTEND;VALUE=DATE-TIME:20260915T081500Z DTSTAMP;VALUE=DATE-TIME:20260922T142637Z UID:indico-contribution-5698-31270@indico.ific.uv.es DESCRIPTION:Speakers: Guido Risaliti (Università di Firenze)\nI present n ew cosmological fits to a Hubble diagram built from supernovae and a homog eneous quasar sample spanning a redshift interval z = 0.7--3.5. The quasar distances are derived from the non-linear relation between X-ray and UV l uminosities\, and the sample is selected to minimize dust reddening\, gas obscuration\, host-galaxy contamination\, and selection biases as describe d in the companion paper. This provides high-quality constraints in a reds hift range otherwise poorly covered by Type~Ia supernovae. The main result s are: (1) the combined Hubble diagram shows strong (> 4 σ) tension with the standard flat ΛCDM model at z ≥ 1.5\; (2) in the overlap region\, t he quasar and supernova Hubble diagrams are fully consistent\, supporting a common distance scale\; (3) allowing for an evolving dark-energy equatio n of state yields a significantly better fit\, with w_0 and w_a values com patible with those favored by recent DESI results\; (4) our quasar Hubble diagram and cosmological constraints agree closely with an independent ana lysis based on ~6\,000 quasars standardized via variability distances (Dut ra et al.~2026). The convergence of two independent quasar methods strengt hens the case that the deviation from flat lcdm at high redshift is not dr iven by sample-specific systematics.\n\nhttps://indico.ific.uv.es/event/81 60/contributions/31270/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31270/ END:VEVENT BEGIN:VEVENT SUMMARY:Overview of the ESA Euclid mission DTSTART;VALUE=DATE-TIME:20260915T071000Z DTEND;VALUE=DATE-TIME:20260915T075000Z DTSTAMP;VALUE=DATE-TIME:20260922T142637Z UID:indico-contribution-5698-31269@indico.ific.uv.es DESCRIPTION:Speakers: Valeria Pettorino (ESA ESTEC)\nTBA\n\nhttps://indico .ific.uv.es/event/8160/contributions/31269/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31269/ END:VEVENT BEGIN:VEVENT SUMMARY:Opening Talks DTSTART;VALUE=DATE-TIME:20260915T070000Z DTEND;VALUE=DATE-TIME:20260915T071000Z DTSTAMP;VALUE=DATE-TIME:20260922T142637Z UID:indico-contribution-5698-31268@indico.ific.uv.es DESCRIPTION:https://indico.ific.uv.es/event/8160/contributions/31268/ LOCATION: URL:https://indico.ific.uv.es/event/8160/contributions/31268/ END:VEVENT END:VCALENDAR