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
The contact person for the regular API colloquia is
Selma de Mink.
The contact person for the joint GRAPPA/API colloquia is
Richard de Grijs
Wednesday 6 September 2017, 11:00
Wednesday 13 September 2017,
Wednesday 27 September 2017,
Leen Decin — Leuven
Wednesday 4 October 2017, 11:00
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.
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.
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.
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.
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.
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.
Wednesday 22 February 2017, 11:00. Location: C4.174