News & Events

People of ASTRON: Fanna Lautenbach

In People of ASTRON we share stories about the people at ASTRON. Who are the people behind the discoveries and innovations and also, who are the people that make sure that everything runs smoothly? Software engineer Fanna Lautenbach studied both astronomy and computer science and found her perfect working place here at ASTRON.

ERIS 2022 School inspires next generation of radio astronomers

Over 70 students from all over the world participated in the 9th European Radio Interferometry School (ERIS 2022) hosted by JIVE and ASTRON in Dwingeloo (the Netherlands) on 19-23 September 2022.

TOPIC-led consortium develops CSP-Low for SKA

The SKA telescopes are currently in the construction phase, and with it the central signal processor (CSP) for the SKA Low frequency telescope, called CSP-Low. CSP-Low will be integrated and delivered to site by a consortium led by the Dutch company TOPIC; ASTRON is one of its subcontractors. One of TOPIC’s specializations is designing and developing hardware, firmware, and software for sophisticated systems.

People of ASTRON: Tom Kamphuis

In People of ASTRON we share stories about the people at ASTRON. Who are the people behind the discoveries and innovations and also, who are the people that make sure that everything runs smoothly? Tom Kamphuis is Head Software Delivery and loves that he can contribute to groundbreaking science.

ASTRON lanceert proeftuin voor ondernemers

Om onze kennis over het heelal te vergroten, verlegt ASTRON voortdurend de grenzen van de technologie in haar radiotelescopen. Deze expertise stellen wij nu ter beschikking om de innovatieve kracht van ondernemers te vergroten. Hiertoe lanceren we het Wireless Data Lab (WDL), een proeftuin waarmee ASTRON haar kennis en faciliteiten op het gebied van draadloze dataoverdracht beschikbaar stelt aan het bedrijfsleven en andere instellingen.

ASTRON-led consortium working on SKAO

A consortium led by ASTRON is developing important software components for processing the vast amounts of data that the soon-to-be largest radio telescope in the world will produce.

Events

Mon 07 Nov 2022 - Thu 10 Nov 2022

Applied RF technology course

The RF course is an excellent introduction for Digital / Analog engineers who are or will be involved in the development of RF systems.

Mon 17 Oct 2022 - Wed 19 Oct 2022

Next Generation Space VLBI workshop

The third edition of the Next Generation Space VLBI workshop (ngSVLBI-2022), co-organised by JIVE and ASTRON in Dwingeloo (The Netherlands) will be held on 17-19 October 2022. The ngSVLBI-2022 workshop will focus on the future of high-resolution radio interferometry. Next-generation Space VLBI missions would be natural extensions of advanced Earth-based facilities such as global VLBI networks, (ng)EHT, […]

Daily Image

Colloquium: Dark matter and angular momentum in nearby disc galaxies

© Pavel Mancera Pina

Dark matter and angular momentum are key parameters regulating the evolution of galaxies through cosmic time: they largely control their total mass, size, and morphology. In this thesis, we have exploited exquisite observations and state-of-the-art analysis tools to robustly measure the motions of the cold gas in disc galaxies, which in turn allows us to infer their dark matter and angular momentum.

In the first part of the thesis, we studied six gas-rich ultra-diffuse galaxies (UDGs). UDGs are very peculiar systems: they have similar effective radii as big spirals like the Milky Way but about 1000 times fewer stars, making them very diffuse. We found that our galaxies rotate much slower than other galaxies with similar baryonic mass, making them strong outliers of the baryonic Tully-Fisher relation. Moreover, our UDGs have baryon fractions as high as the cosmological average, and they appear to have dark matter distributions challenging to explain in the Cold Dark Matter model.

In the second part of the thesis, we obtained some of the most detailed measurements of the stellar, gas, and baryonic specific angular momentum of nearby disc galaxies to date. We discovered a new relationship between the baryonic mass, baryonic specific angular momentum, and gas content; this is one of the tightest known scaling relations of disc galaxies.

Finally, in the last part of the thesis, we accurately determined the dark matter content in a sample of nearby galaxies. For the first time, we systematically accounted for the fact that their gaseous discs are not razor-thin but thick and flared, which allowed us to obtain some of the most detailed estimations of the dark matter content in nearby galaxies. We also revisited baryonic and dark matter scaling relations, finding evidence of feedback processes imprinting signatures on them.

Latest tweets

We are moving our Dwingeloo Test Station for LOFAR2.0 for the next series of tests, as part of a big #LOFAR upgrade, which will enable it to collect even more data and increase its accuracy. @RTVDrenthe visited us to take a look themselves.
https://www.rtvdrenthe.nl/nieuws/15009161/nieuwe-lofar-kan-hele-jaar-door-naar-de-sterren-kijken

2 days ago, the Sun emitted a strong solar flare, which might reach Earth today. Last August, @mabrentjens, radio astronomer at ASTRON, explained what effects these solar flares can have on our technologies.
(image credit: NASA/SDO)
https://nos.nl/artikel/2441058-vandaag-kans-op-verstoorde-navigatie-en-communicatiemiddelen-door-geomagnetische-stormen

The upgrade of our #LOFAR telescope is featured in @SKAO's Contact magazine! We are currently working on a major upgrade towards LOFAR2.0, which will give us more data, more accuracy, and simultaneous usage of our LBA and HBA antennas.
https://issuu.com/ska_telescope/docs/contact_-_issue_11

Over 70 students from all over the world participated in the 9th European Radio Interferometry School (#ERIS2022) - hosted by @jivevlbi and ASTRON & funded by the #H2020 @ORP_Astro - in Dwingeloo (the Netherlands) on 19-23 September 2022 @RadioNet_EU

https://www.astron.nl/eris-2022-school-inspires-next-generation-of-radio-astronomers/

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