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The Christiaan Huygens wetenschapsprijs honours innovative scientific research and is awarded yearly for outstanding PhD theses. Once every three years it is awarded to doctoral theses in the Space Sciences. This year's winner Martijn Oei (Leiden) won for his thesis "Giant galactic outflows and shocks in the Cosmic Web".

There were also two honourable mentions awarded, one to Pavel Mancera Piña (RUG/ASTRON) for his thesis "Dark matter and angular momentum in nearby disc galaxies" and the other to former ASTRON/UvA PhD candidate Kenzie Nimmo for her thesis "Zooming-in on the sources of fast radio transients". In fact, all three awardees did a PhD on radio astronomy!

The awards were given out by Gouke Moes (Minister van Onderwijs, Cultuur en Wetenschap) and the prize committee chair Amina Helmi in a festive ceremony at the Oude Kerk in Voorburg. Because Kenzie was not able to travel to the Netherlands, and I was in South Africa for a MeerKAT review, Ziggy Pleunis and Omar Ould-Boukattine were there to accept the trophy and certificate on her behalf, and on behalf of our AstroFlash research group.

Gefeliciteerd, Kenzie!

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May 1, 2022

The Commensal Radio Astronomy FAST Survey (CRAFTS)

The Five-hundred-meter Aperture Spherical radio Telescope (FAST) has released its first call for proposal and will be open to the international community next year. Based on a novel technique of high-cadence CAL injection, we have realized the world's first calibrated commensal survey mode, simultaneously taking data for pulsar search, HI galaxies, HI imaging, and FRBs. I introduce here one of the major survey plans, namely, the Commensal Radio Astronomy FAST Survey (CRAFTS, Li et al. 2018), which has discovered more than 100 new pulsars, including a few dozen MSPs, 5 new FRBs, including one new repeater. I will also briefly describe recent FAST results from CRAFTS and other dedicated programs, including new insights into the characteristic energy of FRBs, the formation process of neutron stars, the evolution of interstellar medium, etc.

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May 14, 2022

Extreme UV Emission: Bridging Galaxy Evolution Across Cosmic Time

In the last few years, our first glimpse of the spectral properties of z∼5−7 galaxies has emerged. Deep UV spectra have revealed prominent high-ionization nebular emission lines (i.e., C IV, He II, C III]) indicating that extreme radiation fields may be characteristic of reionization-era systems. While such strong high-ionization emission lines are atypical of the well-studied z∼0−3 galaxy samples, our recent UV spectral campaigns have revealed several galaxies with analogous emission-line features to reionization-era systems. I will discuss the recent detection of extremely strong UV emission in nearby galaxies and the potential sources of their very hard ionizing radiation fields. Such strong detections of high-ionization emission lines have been linked to the leakage of Lyman continuum (LyC) photons (necessary for reionization) both theoretically and observationally. These extreme UV emission-line dwarf galaxies provide a template for the extreme conditions that are important for reionization, however their features are still poorly understood. In preparation for the coming UV window onto the early universe with the advent of ELTs and JWST, I will introduce the COS Legacy Archival Spectroscopic SurveY - an upcoming large HST program designed to disentangle the stellar and nebular spectral signatures of 45 star-forming galaxies. This program will calibrate new UV diagnostics that will allow us to trace galaxy evolution to the distant universe, unveiling the properties of reionization-era galaxies.

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The Commensal Radio Astronomy FAST Survey (CRAFTS)

Extreme UV Emission: Bridging Galaxy Evolution Across Cosmic Time

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News & Events

News

Events

Daily image

Colloquia

The Commensal Radio Astronomy FAST Survey (CRAFTS)

Extreme UV Emission: Bridging Galaxy Evolution Across Cosmic Time

Subscribe to the ASTRON newsletter. For previous editions, click here.

Subscribe to the LOFAR newsletter:

For previous editions, click here.

To view the current and previous editions of the LOFAR2.0 newsletter, click here.

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