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.

Upcoming colloquia


Richard de Grijs

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Wednesday 6 September 2017, 11:00


Michael Bonnefoy

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Wednesday 13 September 2017,


Victoria Scowcroft

Wednesday 27 September 2017,


Leen Decin — Leuven

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Wednesday 4 October 2017, 11:00

Past colloquia

The physics of Pulsar Wind Nebulae in the light of 3D MHD simulations

Elena Amato — Arcetri Astrophysical Observatory, Italy

Pulsar Wind Nebulae are highly intriguing astrophysical objects in many respects. They are the brightest and closest class of relativistic sources, and hence the ultimate laboratory for the physics of relativistic plasmas: several processes observed (or inferred to occur) in other classes of relativistic sources can here be studied with unique detail.

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Wednesday 29 March 2017, 11:00. Location: C4.174

Looking for giant rings around a directly imaged exoplanet in 2017 - the bRing Project

Matthew Kenworthy — Leiden University

In 2007, the 20 million year old pre-main sequence star J1407 underwent a complex series of eclipses lasting two months, showing temporal structure down to a timescale of 20 minutes. We interpret this as a giant ring system surrounding an unseen secondary companion, J1407b, that is being sculpted by forming exomoons.

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Wednesday 22 March 2017, 11:00. Location: C4.174

Effective Astronomy Public Engagement and Communication

Stephen Pompea — NOAO

Public engagement and science communication is a key mission of the US National Optical Astronomy Observatory, in Tucson, Arizona and La Serena, Chile. They are experimenting to create broad reaching programs that can improve science education and communicate the excitement of astronomy to the public.

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

From Rorschach to Reality: gaining insight into the local interstellar medium through radio-polarimetry of Galactic synchrotron radiation

Marijke Haverkorn — Nijmegen

Diffuse, polarized radio synchtrotron emission from the Milky Way encodes information about its magnetic field, cosmic ray distribution and thermal electron density. With the advent of the technique of Rotation Measure Synthesis, we can now do Faraday Tomography.

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Wednesday 8 March 2017, 11:00. Location: C4.174

Problem of progenitors of type Ia supernovae

Marat Gilfanov — API -- MPA Garching

Despite the great importance of type Ia supernovae for measuring cosmic distances, there is yet no definitive model for their origin. The key element of the single degenerate scenario - an accreting nuclear burning white dwarf, becomes a powerful source of soft X-ray and UV radiation prior to the supernova explosion.

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Wednesday 1 March 2017, 11:00. Location: C4.174

Measuring gravitational-wave memory with LIGO and Pulsar Timing Arrays

Yuri Levin — Monash University, Australia

Mergers of black holes cause permanent deformation of space, due to the Christodoulou effect. While this gravitational-wave memory signal is weak, I will argue it will be measurable once advanced LIGO reaches its design sensitivity.

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Wednesday 22 February 2017, 11:00. Location: C4.174