Pizza lunch talks

The API pizza lunch talks are informal, weekly meetings where people give a half hour overview of their work (or perhaps a totally different topic), in an informal atmosphere. Pizza meeting is not a colloquium, but is intended to inform and stimulate discussion about the topic.

More information (including tips for speakers, contact points and the latest API articles & circulars).

Past lunch talks

Neutron Star Mass-Radius Constraints using Evolutionary Optimization

Abigail Stevens — API -- UvA

The equation of state of cold supra-nuclear-density matter, such as in neutron stars, is an open question in astrophysics. A promising method for constraining the neutron star equation of state is modelling pulse profiles of thermonuclear X-ray burst oscillations from hotspots on accreting neutron stars.

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Thursday 24 November 2016, 12:00. Location: C4.174

A new semi-analytical model for black hole jets

Chiara Ceccobello — API -- UvA

Collimated outflows are one of the most common features observed in astrophysical sources, because they are associated with a variety of objects, including X-ray binaries, active galactic nuclei, young stellar objects, and gamma ray bursts. Emission from such jets extends over the whole electromagnetic spectrum and is a proxy of the nature and activity of the central engine.

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Thursday 17 November 2016, 12:00. Location: G3.10

Probing the Inner Disk and Corona in AGN with X-ray Spectroscopy

Laura Brenneman — Harvard University

Supermassive black holes (SMBHs) are the most powerful engines in the Universe, but much about their inner workings close to the event horizon remains unknown. I will review our present knowledge of the inner accretion disk/corona system in actively accreting SMBHs.

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Thursday 10 November 2016, 12:00. Location: H331 (Nikhef, third floor)

Making Close Double Neutron Stars and Black Holes by Spiral-in without Common-Envelope Evolution

Ed van den Heuvel — API -- UvA

When the donor star in a High-Mass X-ray Binary (HMXB) has a radiative envelope when it begins to overflow its Roche lobe, a Common-Envelope (CE) phase will in most cases be avoided. I will show that making close double black holes by regular binary evolution does not require wide initial binaries.

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Thursday 3 November 2016, 12:00. Location: G.005

Particle Acceleration in Mildy Relativistic Plasmas

Patrick Crumley — API/GRAPPA -- UvA

I will discuss the physics of particle acceleration in shocks in a regime largely ignored in the literature, the transition between relativistic and Newtonian shocks, presenting preliminary results of particle-in-cell simulations of mildly relativistic shocks that show non-thermal acceleration in both electrons and ions.

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Thursday 27 October 2016, 12:00. Location: C4.174

Direct probe of the inner accretion flow around the supermassive black hole in NGC 2617

Margherita Giustini — SRON

Active Galactic Nuclei (AGN) are powered by mass accretion onto supermassive black holes (SMBHs) residing at the center of galaxies, and are thought to be the main manifestation of the co-evolving phase between SMBHs growth and host galaxy formation.

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Thursday 20 October 2016, 12:00. Location: C4.174

AGN jets and neutrinos

Felicia Krauss — API/GRAPPA -- UvA

Active galaxies harbor a supermassive black hole at their center. They often show perpendicular outflows of matter, called jets, which might contribute to the observed cosmic rays and neutrinos.

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Thursday 13 October 2016, 12:00. Location: C4.174

Anton Pannekoek: A lifetime of Astronomy and Marxism

Chaokang Tai — UvA/ Descartes Centre -- Utrecht University

In my talk, I will give a brief biography of the complex life of Anton Pannekoek, founder of our astronomical institute. Pannekoek (1873 – 1960) was one of the most fascinating astronomers of the early twentieth century.

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Thursday 6 October 2016, 12:00. Location: C4.174

AstroSat and ​prospects for multi-wavelength studies of blazars

Sunil Chandra — Tata Institute of Fundamental Research, Mumbai

AstroSat is India's first space based multi-wavelength astronomical observatory, providing access over a broad energy band of the electromagnetic spectrum with unprecedented sensitivity. In this talk I will present some preliminary results and mention the prospects for blazar studies with AstroSat.

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Thursday 22 September 2016, 12:00. Location: C4.174

Well-being on the job

PhD/PD Council and Director — API -- UvA

In recent times, some surveys have shown that young academics (PhD candidates and postdocs) are at greater risk of having problems related to mental well-being than the average person.

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Thursday 15 September 2016, 12:00. Location: C4.174