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News

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LOFAR Newsletter January 2024
Retirement of Early LOFAR Cycle data (Cycle 0 to Cycle 6)
LOFAR Newsletter October 2023

Events

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Daily image

Opening Open Science Hub Exloo

© Team Communications

Opening of the Open Science Hub ‘De Oerknal’ in Exloo

Last Tuesday, February 11, we officially opened the Open Science Hub ‘De Oerknal’ in Exloo. After years of development, the opening was finally there! The opening ceremony started with Elsbeth Jansen, Mayor Jan Seton of Borger-Odoorn, and the children’s mayor Bibi Wubs.

The Open Science Hub ‘The Big Bang’ has been specially designed for young students aged 10 to 14. In this unique learning environment, they are introduced to (radio) astronomy in a playful way through three escape rooms equipped with interactive technology. In teams of four to six players, participants take on the roles of researcher, philosopher, or engineer and embark on an adventurous journey through time. During their journey of discovery, they seek answers to three major questions:

- Where are we in the universe?

- Where (or when) did the universe begin?

- What does the future of the universe look like?

At the end of the escape room, the students will reflect on an inspiring learning experience in which technology, science, and collaboration are central. Over the coming period, we will continue to refine and optimize the escape room. Any potential improvements will be addressed so that we can officially welcome school classes.

Once the escape room has been fully tested, we will also make this known to you. It will be very exciting to experience this together with your team!

Colloquia

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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