Seminário de Astro-tecnologia

Indiana Jones and where to find relic galaxies

Sala 1.4.14, FCUL, Lisboa

Por Fernando Buitrago Alonso (IA).

Abstract: There are galaxies that remain untouched since the high-z Universe. These objects, the so-called relic galaxies, are several times more massive than our Milky Way but with much smaller sizes, and containing very old (>10 Gyr) stellar populations. For the very few of them already found and analysed, they seem to host "too heavy" central super massive black holes, also displaying an overabundance of low mass vs high mass stars and retaining their primeval morphologies and kinematics. How did they survive until the present day? Simulations predict that they live in galaxy overdensities whose large internal random motions prevent galaxies from merging. However, we have not yet determined observationally neither the environments these galaxies inhabit nor how many there are (their number densities). I am participating in the GAMA survey, that allows us to conduct a complete census of this elusive galaxy population, because of its large area and spectroscopy. After inspecting hundreds of square degrees of the sky using the deepest photometric images, we have identified 29 of these unique relics in the nearby Universe (up to 1500 Mpc distance), that are true windows to the ancient Universe. I will present the first paper about this exceptional sample, describing its properties and highlighting the fact that while some of galaxies seem to be satellites of bigger objects, others do not reside in clusters, at odds with the theoretical expectations.

15h30
Departamento de Física / CENTRA-Ciências - Centro de Astrofísica e Gravitação

Cancelamento motivado pela aplicação do plano de contingência da Faculdade de Ciências da Universidade de Lisboa, na sequência das orientações da Direção-Geral de Saúde e das recomendações por parte da Reitoria da Universidade de Lisboa, relativamente ao novo Coronavírus (CO

Apresentações de Andreia Figueiredo (Ciências ULisboa) e Paula Silva (ICBAS.UPorto / Science & Wine).

Speaker: Pavel Exner (Doppler Institute for Mathematical Physics and Applied Mathematics, Prague).

Candidaturas a decorrer até ao dia 15 de julho de 2020.

IN3+  | Um Milhão para a Inovação.

O prémio IN3+ destina-se a todos os investigadores pertencentes às entidades que integram a Rede Inovação INCM.

Cancelamento motivado pela aplicação do plano de contingência da Faculdade de Ciências da Universidade de Lisboa, na sequência das orientações da Direção-Geral de Saúde e das recomendações por parte da Reitoria da Universidade de Lisboa, relativamente ao novo Coronavírus (COVID-1

Speaker: Gonçalo Tabuada (FCTUNL).

New date: September 14th-16th, 2020.

O principal objetivo desta iniciativa centra-se em atrair fotógrafos profissionais e amadores a submeter trabalhos de excelência produzidos em Portugal e nos países africanos de língua oficial portuguesa (PALOP) e fomentar práticas de observação, conhecimento e registo através

Ciências ULisboa associa-se ao maior evento mundial sobre inovação para a sustentabilidade - “The Planetiers World Gathering” - que terá lugar no Altice Arena entre 21 e 23 de outubro de 2020, sob os auspícios da

Programa de Formação Contínua de Professores do Ensino Básico (3.º ciclo) e Secundário, grupos 420 e 520.

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