Wednesday colloquia

The API colloquia are weekly meetings where people give a 45 minute overview of their work. Afterwards there is time for discussion. At the end of each month the colloquia are jointly held with GRAPPA.

The contact person for the regular API colloquia is Selma de Mink.
The contact person for the joint GRAPPA/API colloquia is Jacco Vink.

Past colloquia

Hits from Space Asteroseismology: Stellar Evolution, Exoplanets, and Galactic Archeology

Conny Aerts — KU, Leuven

We start the talk with a basic introduction into asteroseismology for the non-expert. We show how detected and identified oscillation modes allow to deduce details of the interior physics of stars that are impossible to unravel in any other way.

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Wednesday 15 February 2017, 11:00. Location: C4.174

How galaxies grow and die: Disk and Bulge Formation, Quenching and Environment

Marcella Carollo — Extragalactic Astrophysics Research Group, Zurich

I will discuss how stellar mass builds up with time inside galaxies, and present the perspective that emerges. I will conclude with a perspective on the role of super-galactic environment in shaping galactic physics.

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Wednesday 8 February 2017, 11:30. Location: C4.174

Dust and Molecules in SN1987A

Mikako Matsuura — School of Physics and Astronomy, Cardiff University

Supernovae (SNe) play a crucial role in the chemical evolution of galaxies by enriching their interstellar media (ISM) with heavy elements. There is a decade debate whether SNe can be also important source of dust in the ISM, by condensing newly synthesized elements into dust in SNe.

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Wednesday 1 February 2017, 11:30. Location: C4.174

Chasing and Characterizing Electromagnetic Counterparts to Gravitational Waves

Wen-Fai Fong — Steward Observatory, University of Arizona

Thanks to the advent of the Advanced LIGO/VIRGO network, the era of gravitational wave discovery is upon us. Their continued discovery will bring unprecedented information about the basic properties of compact object mergers.

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Wednesday 25 January 2017, 11:30. Location: C4.174

Intensity Interferometry and Imaging of Stellar Surfaces

Dainis Dravins — Lund Observatory, Sweden

Optical imaging with microarcsecond resolution will reveal details on and around stellar surfaces but requires kilometer-scale interferometers. Intensity interferometry, electronically connecting independent telescopes, has an error budget that relates to electronic time resolutions of nanoseconds and light-travel distances of centimeters or meters, circumventing issues of atmospheric turbulence.

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Wednesday 18 January 2017, 11:30. Location: C4.174

Christmas Colloquium: Climate change — where science meets society

Gerard van der Steenhoven — KNMI, de Bilt

We will discuss the science of climate change: the observations, the physical mechanism, future scenarios and the future impact. We will address what needs to be done to reduce the risks associated with climate change; how much time is left, what kind of research is needed, and what measures can be taken.

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Friday 16 December 2016, 16:30. Location: A1.10

The Importance of being Eccentric

Ann-Marie Madigan — University of Colorado Boulder

Disks composed of eccentric orbits undergo rich gravitational dynamics and experience new instabilities not available to their circular counterparts. I will review this emerging field of gravitational dynamics and will discuss implications ranging from the solar system to stars orbiting supermassive black holes.

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Wednesday 14 December 2016, 11:30. Location: C4.174

The gamma-ray view on interstellar gas and dust

Isabelle Grenier — AIM, Université Paris Diderot & CEA Saclay

The structure of the interstellar gas into different chemical and thermodynamical phases is well established, but improving our understanding of their interrelationships and time evolutions still requires observational and theoretical efforts. The gamma rays produced by cosmic-ray interactions with interstellar gas can shed light on these matters by tracing the total gas in each phase.

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Wednesday 7 December 2016, 11:30. Location: C4.174

Exploring the near-Earth plasma environment using widefield radio interferometers

Shyeh Tjing (Cleo) Loi — University of Cambridge

A new generation of widefield, low-frequency radio telescopes is rapidly coming into operation around the world. Their novel properties, compared with the old generation of dish-based instruments, impart them with the ability to probe the Earth's plasma environment in unprecedented breadth and detail.

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Wednesday 30 November 2016, 11:30. Location: C4.174

Moving Mesh Simulations of Binary Black Hole Accretion and Relativistic Jets

Andrew MacFadyen — New York University

I will discuss novel "moving mesh" techniques for numerical hydrodynamics and present recent simulations exploring the dynamics and observational signatures of two topics: 1) accretion onto binary black holes and 2) relativistic jets.

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Wednesday 23 November 2016, 11:00. Location: C4.174