The Council of Ministers has approved this Tuesday the accession of Spain as a full member of the SKA Observatory (SKAO), an intergovernmental organisation that is building two complementary world-class radiotelescopes that will constitute one of the largest and most ambitious scientific infrastructures on the planet.

The initial construction phase of the SKAO telescopes, covering the period from 2021 to 2030, will cost a total of 2,022 million euros. Spain will contribute a total of 41.4 million euros to this phase of the project, of which 7.9 million euros have already been paid between 2021 and 2022 (5.1 million euros from the Recovery, Transformation and Resilience Plan). In 2023, €2.5 million from the national budget is foreseen.

The formalisation of Spain's incorporation into the SKAO as a full member now allows Spanish companies to participate in the contracts for the construction of the two radiotelescopes, thanks to the principle of return that applies in this international organisation.

The participation of Spanish companies in at least five SKAO construction contracts is currently guaranteed. Spain will be responsible, for example, for the manufacture of the sub-reflectors (secondary mirrors) for the parabolic antennas and the production of the equipment for the time synchronisation of the radiotelescope receivers.

Spanish industry will thus increase its expertise in the many cutting-edge technologies and big data techniques that are indispensable for the operation of the SKAO and that are being developed specifically for this unique project.

Moreover, thanks to this adhesion, Spanish scientists will be able to carry out pioneering radio astronomical observations at the front line, which are destined to lead to transformational discoveries in the study of the universe.

"We are really grateful for the support of our SKAO colleagues over the years. It has been amazing to have reached this point, and we have thoroughly enjoyed the journey to get there working together with the Ministry, the CDTI and the astronomy community. Now we can move forward with even more challenging and exciting activities as part of the SKAO", declare Lourdes Verdes-Montenegro (IAA-CSIC), coordinator of the Spanish participation in SKAO.

SKAO telescopes: two innovative and revolutionary radiotelescopes

During the current construction phase, the member states of this intergovernmental organisation will agree on the contributions and the construction schedule for the next phase of the project.

The SKAO radio telescopes will consist of two arrays of hundreds of thousands of antennas of different types. The first array, dedicated to low-frequency antennas, will be located in the Murchison district of Western Australia, while the second, dedicated to medium and high frequencies, will be distributed in the Karoo Desert of South Africa.

When completed, the SKAO telescopes will be a colossal observatory: they will have tens of times the sensitivity, and thousands of times the observing speed, of the best radio astronomical facilities available today, and their performance will not be surpassed by any other radiotelescope for decades.

In addition to the scientific and technological challenges it will overcome, SKAO also faces an organisational and management challenge that is being addressed through close intergovernmental cooperation on a global scale, cooperation that will serve as a model for other large multinational projects.

Spain's participation in the SKA

Spain has been working on the design and preparatory tasks of the project since the 1990s together with the states that have already ratified the agreement establishing the SKAO - Australia, China, Italy, the Netherlands, Portugal, the United Kingdom, South Africa and Switzerland - and those that are in the process of ratifying it - Germany, Canada, South Korea, France, India, Japan and Sweden.

The technical coordination of the Spanish participation in the project is the responsibility of the Institute of Astrophysics of Andalusia (IAA-CSIC), which belongs to the Consejo Superior de Investigaciones Científicas (Spanish National Research Council), an agency of the Spanish Ministry of Science and Innovation, whose main role is to organise the national scientific community for its participation in the project.

There are currently astrophysicists from Spain involved in almost all the SKA science working teams, as well as in other groups, such as the energy supply options or the coordination of the regional centres.

The Council of Ministers has approved this Tuesday the agreements by which the Ministry of Science and Innovation will allocate 2.5 million euros to the international radiotelescope Square Kilometre Array (SKA), of which 0.7 million euros will come from the European funds of the Recovery, Transformation and Resilience Plan and will be devoted to the development of its instrumentation.

The SKA radiotelescope will consist of hundreds of thousands of antennas of different types, spread over different locations, ranging from the Karoo Desert in South Africa, which will host the core of high and medium frequency dishes, to the Murchison Shire in Australia, which will host the low frequency antennas.

The SKA will be thousands of times faster at observing the sky than the best radioastronomy facilities today and will enable astronomers to make sky observations in great detail, exceeding the image resolution quality of the Hubble space telescope by several orders of magnitude.

In this way, the SKA radio telescope will make ground-breaking contributions to astrophysics, astrobiology, fundamental physics, geophysics and geodesy. Among other functionalities, it will enable progress to be made in the search for signs of life in the galaxy and the observation of pulsars, black holes and gravitational waves.

Spain's participation in SKA

Our country has been participating in SKA since 2011 and has expressed its interest in participating as a full partner in the SKA observatory which, under the legal form of an international body, will be the entity responsible for carrying out the construction of the world's largest radiotelescope.

Part of the amount approved on Tuesday will be recognised by SKA as part of the agreed contribution with which Spain will become a full member.

The technical coordination of the Spanish participation in the project is the responsibility of the Institute of Astrophysics of Andalusia (IAA-CSIC), which belongs to the Consejo Superior de Investigaciones Científicas (Spanish National Research Council), an agency of the Spanish Ministry of Science and Innovation, whose main role is to organise the national scientific community for its participation in the project.

At present, astrophysicists from Spain are involved in almost all the science working teams of the SKA, as well as in other groups, such as the energy supply options or the coordination of the regional centres. In addition, a representative of the CDTI has been appointed to encourage Spanish industrial participation in SKA developments.