Astrophysics

I will introduce the Gaia mission and briefly summarize the latest datarelease, Gaia EDR3, including some guidance on the use of the data. Thisis complemented by highlights of the science results from Gaia DR2 and Gaia EDR3.

Observations of type Ia supernovae (SN Ia), a class of exploding stars, ushered in a cosmological revolution: the expansion of the Universe is accelerating, driven by dark energy. I will describe current cosmological applications of SN Ia to measure...

Normalizing Flows (NF) are bijective maps from the data to a Gaussian (normal) distribution or viceversa. In contrast to other generative models they are lossless and provide data likelihood via the Jacobian of the transformation. I will first...

The Event Horizon Telescope (EHT) has produced images of both total intensity and polarized radiation from plasma around the supermassive black hole in M87 on event horizon scales.

In this talk, I will discuss what these images tell us about the...

Abstract 1: Upcoming cosmological surveys will measure the large-scale distribution of galaxies at the subpercent level. In order to extract unbiased cosmological data while retaining valuable small-scale information, we need highly accurate models...

The NASA Kepler mission has provided its final planet candidate catalogue, the K2 mission has contributed another four years’ worth of data, and the NASA TESS mission has been churning out new planet discoveries at a rapid pace. The demographics of...

Each week, we hold a relatively informal seminar/discussion series with an emphasis on extra-galactic and large-scale structure astrophysics.

During Galread a leader/visitor presents a recent paper to the discussion group. The PDF of the paper is...

It was recently proposed that extragalactic fast radio bursts can be produced during magnetic reconnection in a compressed current sheet of the magnetar wind, triggered by the strong fast magnetosonic pulse produced by a magnetar flare. The current...

Direct-imaging surveys are gradually filling in the parameter space of massive substellar objects (brown dwarfs and giant exoplanets) at wide orbital separations (>1 au). As statistically large samples of such objects are built up, we can begin to...