I am a radioastronomer and the Operations Scientist of the SKA Regional Centre (SRC) Spanish prototype, where I coordinate the scientific operations, resource allocation, user support and training activities. I am also contributing to the design of the Global Network of SRCs at the international and national levels.

My research covers some of the most energetic phenomena in the Universe, from binaries emitting very-high-energy gamma-rays to bursts of star formation in nuclear regions of active galaxies, regulating galaxy evolution, with contributions to exoplanets and multimessenger astronomy.

For my research, I use a great variety of radio interferometers all around the world, including VLBI arrays. I have technical experience commissioning and operating radio interferometers and developing data processing workflows with an emphasis on reproducibility and Open Science values.

Javier Moldon


  • Binary stars


    I measured the morphology of the outflow of relativistic particles with milliarcsecond resolutions of the known population of gamma-ray binaries using radio VLBI techniques to achieve milliarcsecond spatial resolution. I also studied transitional millisecond pulsars and superluminal ejecta from other types of X-ray binaries

  • Galaxy evolution


    I'm interested in understanding the physics in the nuclear regions of local Luminous (and Ultraluminous) Infrared Galaxies aiming to characterise high-redshift star-forming galaxies. Additionally, low-frequency observations are ideal to unveil the relativistic particles ejected from supermassive black holes, and LOFAR provides subarcsecond resolution sharp images of relativistic outflows to study relativistic jet knots, spectral ageing of radio lobes or high-redshift blazars

  • Neutral hydrogen

    Neutral Hydrogen

    I am the technical lead of a proposal of the SKA precursor MeerKAT to unravel the gas content of a sample of gas-deficient Hickson Compact Groups in advanced evolutionary phases, as well as the role of HI gas in galaxy evolution and star formation

  • Supernovae, Tidal Disruption Events and transients


    I'm interested in using state-of-the-art instrumentation to organize multi-epoch and multifrequency campaigns to track elusive transient events, such as supernova Ia, tidal disruption events, GRBs

  • Exoplanets


    From the IAA we are coordinating extensive radio campaigns to probe the interaction between M-dwarf stars and their planets through highly circularly polarized, coherent, periodic enhancement of the radio emission. We aim to open the avenue for detection and confirmation of exoplanets using radio observations, which is relevant to assessing the habitability of planets around M-dwarf stars

  • Multimessenger astronomy


    I am committed to contributing to multi-messenger astronomy: I coordinated the response from the e-MERLIN observatory to the historical first and only up to now detection of a binary neutron star merger detected as a gravitational wave event. Also, I contribute to an international team that aims to associate neutrino events detected by IceCube with potential blazar candidates

Impact of my research

  • 185 Bibliographic entries
  • 105 Refereed publications
  • 7430 Total citations
  • 106850 Reads
  • 5 Book chapters
  • 19 ATels/GCNs

SKAO and the Spanish SKA Regional Centre Prototype

The Square Kilometre Array Observatory (SKAO) is an international effort to build the world’s largest radio telescope. The Global Network of SKA Regional Centres is where the SKA Science will be done.

Credit: SKA Organisation

With Spain becoming a member of the SKA Observatory (SKAO) in 2018, the IAA-CSIC incorporated into its Severo Ochoa program (2018-2026) the development of a Spanish Prototype of a SKA Regional Centre (SPSRC). My primary responsibility is the management of the SPSRC operations, where I oversee the scientific operations as well as the platform's training initiatives, resource allocation, and technical and scientific user support. Beyond being merely a computer cluster, the platform gains distinctive value thanks to the scientific assistance and the training programs.
I play a substantial role in a number of technological and scientific projects that are creating the Global Network of SKA Regional Centers. As a core member of the SRC Steering Committee's Operations Working Group since 2020 and as a prototype developer since 2022, I am enabling the development of the Global SRC Network. I am serving as the Spanish scientific representative in the SKA-NREN (the European National Research and Education Network providers). I took part in the Innoglobal project "Supporting Open Science in the SKA by Gathering Provenance" in 2020 with the company GMV.

Open Science and Training

At the IAA-CSIC, I am one of the co-coordinators of the Severo Ochoa training program. I plan and organize training events and participate as a tutor as well. I am firmly committed to the adoption of Open Science and FAIR methodologies because I believe these are essential for reliably disseminating and building upon research results.

  • Open Science training

    Open Science Droplets

    A series of short demonstrations and online materials on tools and methods that make our research analyses more organised, automatic and reproducible

  • Interferometry


    I was invited as a lecturer in the 3rd LOFAR School in 2014, the 4th LOFAR School in 2016, the data processing workshop on e-MERLIN and ALMA in 2018 in Dublin, and the CASA-VLBI workshop in 2020

  • docker and singularity containers

    SKA Regional Centre Training Event “Hands-on Containerization”

    I was a tutor for the first SKA Regional Centre Training Event focused on version control, software repositories and containers (Docker/singularity) with more than 250 registered participants.

  • python training


    Hands-on tutorials on Astrophysical Python Packages. Topics cover astropy, matplotlib, astronomical tables, astroquery, SPISEA, data exploration, etc.

  • Reproducibility

    Tools for the reproducibility of the scientific analysis

    I coordinated this CSIC course covering: git, Github, collaborative science, FAIR principles, conda, Singularity, workflow management systems, Jupyter notebooks, Binder, Open Science policies, data repositories, Zenodo, etc.

  • Machine Learning training

    Machine Learning

    I discussed potential approaches to the Big Data problem of the future SKA in two lectures I gave in two editions of the school “Machine Learning, Big Data, and Deep Learning in Astronomy”, SOMACHINE 2020 and 2021. I represented the IAA-CSIC in the outreach event "Talking about Artificial Intelligence", #TAI Granada 2022 [talk]


I am committed to promoting collaborative science through the practical dissemination of Open Science principles and reproducibility best practices, always willing to share my knowledge to benefit the community.
Collaboration in science is crucial, in my opinion. I have always prioritised problems that require coordination, joint international efforts and, sometimes, decade-long teamwork.