BEGIN:VCALENDAR VERSION:2.0 PRODID:-//ZContent.net//ZapCalLib 1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT DTSTART;TZID=Atlantic/Canary:20220203T103000 DTEND;TZID=Atlantic/Canary:20220203T113000 UID:iactalks-1529 X-WR-CALNAME: IAC Talks: Open Astronomy Seminars X-ORIGINAL-URL: /iactalks/Talks/view/1529 CREATED:2022-02-03T10:30:00+00:00 X-WR-CALDESC: IAC Talks upcomming talks SUMMARY:Cornering the Hubble tension by studying systematics and reconstruc ting the local Universe with supernovae (HOSTFLOWS) DESCRIPTION:Cornering the Hubble tension by studying systematics and recons tructing the local Universe with supernovae (HOSTFLOWS)\nDr. Lluis Galbany \n\nThe expansion rate of the Universe parameterized by the Hubble-Lemaì‚ tre parameter H(z), has been a major endeavor in cosmology since the disco very of the expanding Universe. In the last years, significant effort has been put forth to measure with high precision the local value of the Hubbl e-Lemaì‚tre parameter known as the Hubble constant (H0), and today H0 is estimated from the distance ladder with an uncertainty of <3% . Perplex ingly, these findings have revealed a dramatic discrepancy dubbed "the Hub ble tension": the estimation of H0 from the local distance ladder is in st rong disagreement (at 4.4σ or 99.99% level) with the value inferred at high-redshift from the angular scale of fluctuations in the cosmic micr owave background (CMB), possibly hinting towards new physics beyond the st andard model. This discrepancy represents the most urgent puzzle of modern cosmology, and it is nowadays one of its hottest topics. The HOSTFLOWS pr oject aims to advance towards solving of this tension by (i) performing an unprecedented study of the local environments of nearby standard candles to address the leading systematic uncertainties in the measurement of H0, and (ii) reconstructing the panorama of our supercluster Laniakea by study ing cosmic flows using type Ia supernovae (SNe Ia) in the near-infrared (N IR). In this talk, I will introduce the topic and summarize the current an d future efforts HOTFLOWS is doing in this regard.\nZoom link: https: //rediris.zoom.us/j/81863823691?pwd=OFM1QW9Qc0dOQjZZVVd5RHAxM3FvQT09\nMeet ing ID: 818 6382 3691\nPasscode: 223140\nYoutube link: http s://youtu.be/uGQPTJCZIfE\n END:VEVENT END:VCALENDAR