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agosto de 2019

Dark matter and the status of a peculiar acceleration scale – Davi Cabral Rodrigues (UFES)

14 de agosto: 12:30 - 13:30
Anfiteatro Antonio Cabral,

This talk is about dark matter, with emphasis on its properties in galaxies. I will comment on what is expected from the standard dark matter model and what is observationally found, including the emergence of a peculiar correlation that depends on an acceleration scale.

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A journey through Data science: From astrophysics to neuroscience – Rafael Garcia-Dias

21 de agosto: 12:30 - 13:30
Anfiteatro Antonio Cabral,

The power of collecting, storing, and processing data is revolutionizing science. The continuous growth of datasets drives the demand for scientists that can deal complex and maintainable code. In this talk, I will discuss some key aspects in the challenges of big data, the replicability of science, and my personal journey from astrophysics to neuroscience.

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First Light: Stars, galaxies and black holes in the epoch of reionization (alunos de extragaláctica)

28 de agosto: 12:30 - 13:30
Anfiteatro Antonio Cabral,
setembro de 2019

LSST: the construction of a discovery machine – Ângelo Fausti (LIneA-LSST)

4 de setembro: 12:30 - 13:30
Anfiteatro Antonio Cabral,

When science operations begin in 2022, the Large Synoptic Survey Telescope (LSST) will conduct a 10-year survey of the southern sky with the world's largest digital camera. LSST will produce 500 petabytes of image data and a variety of data products to address the most pressing questions about the structure and evolution of the Universe and its content. While science collaborations are getting organized to analyze this unprecedented dataset, these are exciting times for the project as LSST construction approaches…

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BRAMON: Uma Rede Baseada na “Ciência Cidadã” – Carlos Fernando Jung (FACCAT)

18 de setembro: 12:30 - 13:45
Anfiteatro Antonio Cabral,

Nesse seminário, serão abordados os seguintes tópicos: Ciência Cidadã, Funcionamento da Rede Brasileira de Monitoramento da Meteoros, Principais descobertas científicas e desenvolvimentos, Registro e Análise de Meteoros e o Centro de Monitoramento de Meteoros, Satélites e TLEs no RS.

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Radiation Line-driven Winds in B Supergiants – Lydia Cidale (Universidade Nacional de La Plata)

25 de setembro: 12:30 - 13:30
Anfiteatro Antonio Cabral,

The theory of radiatively driven stellar winds has been successful in describing the wind properties (mass-loss and terminal velocity) of massive supergiants. Inclusion of rotation in the models brought a remarkable progress in the development of this theory. Three types of stationary wind regimes are currently known; the classical fast solution, the Omega--slow solution that arises for fast rotators, and the delta--slow solution that takes place in highly ionized winds. We discuss the properties of these hydrodynamical solutions and their…

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outubro de 2019

TBA – Carmela Lardo (Laboratoire d’ Astrophysique, Ecole Polytechnique Fédérale de Lausanne, Observatoire de Sauvern)

2 de outubro: 12:30 - 13:30
Anfiteatro Antonio Cabral,

Carving out the low surface brightness universe – Mohammad Akhlaghi (Instituto de Astrofísica de Canarias)

9 de outubro: 12:30 - 13:30
Anfiteatro Antonio Cabral,

Astronomical instrumentation has greatly advanced over the last 40 years: with digital detectors, space telescopes and +8m class ground-based telescopes for example. However, in the methods/software regime, the signal-based detection paradigm from the 1970s (for example from Petrosian or Kron, mostly used as implemented in SExtractor from the mid-1990s) is still the dominant method of extracting high-level catalogs from the low-level image pixels. In this talk, after reviewing the major systematic biases regarding astronomical object detection that is inherent to…

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Dynamical effects of an eccentric giant planet on outer small body reservoirs – Gonzalo C. de Elía (Universidade Nacional de La Plata)

16 de outubro: 12:30 - 13:30
Anfiteatro Antonio Cabral,

The last 25 years of investigations concerning planetary sciences have led to a real explosion of new discoveries in extra-solar planets. In fact, the number of confirmed planets discovered to date outside the solar system amounts to about 4000, which show a wide diversity of physical and dynamical properties. In particular, giant gaseous exoplanets exist on diverse orbits with small, moderate, and high eccentricities, which even reach values of up to 0.97. The dynamical structure of planetary systems that host…

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Two decades of eyes wide open – The Gemini Observatory (Ricardo Salinas, Gemini South – La Serena)

17 de outubro: 13:30 - 15:10
Sala O207,

2019 marks the 20th anniversary of the first light at Gemini North in Hawai'i, which was quickly followed the next year by Gemini South in Chile. Since then, the Geminis have been serving the astronomy communities of a large partnership, including Brazil. In this talk I will review the pros and cons of the telescopes design; and its current and future instrumentation, with an emphasis on some new capabilities at Gemini South as speckle interferometry and high resolution spectroscopy. I…

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