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Event ID:  48133
Contact Name:  Observatório Nacional
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Organization:  Coordenação de Astronomia e Astrofísica do Observatório Nacional (COAST/ON)
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Dates:  14th October 2021 to 14th October 2021
Physical Event:  No
Type:  Other
Start/End Type:  Both Starts and Ends During WSW
Country:  Brazil
Event Name:  Ciclo de Seminário da Coordenação de Astronomia e Astrofísica 2021
Event Description:  Na quinta-feira, dia 14 de outubro, a Coordenação de Astronomia e Astrofísica do Observatório Nacional (COAST/ON) realizará uma nova edição de seu seminário semanal de interesse da comunidade astronômica. O tema do próximo evento online, que acontecerá às 10h (horário de Brasília), será: “Searching for dark energy off the beaten track”. Para falar sobre o assunto, foi convidado o palestrante Sunny Vagnozzi, do Kavli Institute for Cosmology and Institute of Astronomy, da Universidade de Cambridge, no Reino Unido. Durante este ano, os seminários da COAST estão acontecendo de forma remota pelo canal do youtube do ON. Dependendo da localização do palestrante, os seminários vão acontecer em um dos dois horários: ou às 10:00 ou às 15:00 (horário de Brasília). Title: Searching for dark energy off the beaten track Sunny Vagnozzi - Kavli Institute for Cosmology and Institute of Astronomy, University of Cambridge - UK 14/outubro - 10h Abstract: Most of the efforts in searching for dark energy (DE) have focused on its gravitational signatures, and in particular on constraining its equation of state. However, there is a lot to be learned about DE by getting off the beaten track. I will first focus on non-gravitational interactions of DE with visible matter, leading to the possibility of "direct detection of dark energy" (analogous to direct detection of dark matter): I will argue that such interactions can and potentially may already have been detected in experiments such as XENON1T, while discussing complementary cosmological and astrophysical signatures. I will then discuss early- and late-time consistency tests of LCDM, and how these may shed light on (early and late) DE in relation to the Hubble tension. I will present two such tests based on the early ISW effect and the ages of the oldest astrophysical objects in the Universe.
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