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ARRAKIHS
@arrakihs-mission.eu
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ARRAKIHS Mission Consortium official account

A new light on dark matter 🌌🔭 | #ARRAKIHSMission🚀 |

https://arrakihs-mission.taplink.ws/
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arrakihs-mission.eu
How do we prepare a space mission before it observes the Universe? 🤔
With simulations.

ARTEMIS simulations + machine learning help predict the properties of faint galaxy halos, preparing us for future ARRAKIHS observations 🌌

🔗 Read it here: www.arrakihs-mission.eu/2026/01/13/e...
Visualisation of one galaxy, but simulated many times assuming different parameters that control the detailed way in which massive stars explode at the end of their lives.
January 27, 2026 at 12:32 PM
arrakihs-mission.eu
🚀 Exciting Opportunity Alert!

We're expanding our team and looking for a Postdoctoral Position in the detector Characterization Group, at
IFAE.

➡️ Click here to apply: ifae.es/careers/jobs...

#hiring #joboffer
January 23, 2026 at 1:12 PM
arrakihs-mission.eu
✨How many galaxies should #ARRAKIHS observe?

Simulations suggest ~80–84 gives a strong chance of capturing the diverse range of stellar halos needed for significant science, a smart balance of ambition and feasibility 🚀🌌

🔗 arrakihs-mission.eu/2025/12/19/h...
January 9, 2026 at 1:34 PM
Reposted by ARRAKIHS
science.esa.int
In 2022, #Arrakihs was selected as a fast mission under #CosmicVision.

By imaging Milky Way-type galaxies in the nearby Universe, Arrakihs will provide important measurements to address key questions in galaxy formation theory. 

1/ #CM25 🔭
A 4 x 4 collage of ground-based images of nearby galaxy halos with stellar streams. Arrakihs will observe stellar streams 10 times fainter than these halo features.
November 19, 2025 at 1:03 PM
arrakihs-mission.eu
The ARRAKIHS Mission Consortium wishes you a happy 2️⃣0️⃣2️⃣6️⃣!! 🎉🎊
#HappyNewYear
December 31, 2025 at 1:35 PM
arrakihs-mission.eu
🔭 New research shows that AI models like SAM can measure galaxy sizes with ~1% accuracy.

This could be key for ARRAKIHS, helping detect faint halos, tidal streams, and other low–surface-brightness features that trace galactic evolution and dark matter.

📲 bit.ly/4pZR113

@cefca-oaj.bsky.social
A New AI Tool to Map the Outskirts of Galaxies - ARRAKIHS Mission
Determining the size of a galaxy requires identifying the point at which its light distribution shows a clear decline, a feature often referred to as its truncation. This boundary offers valuable info...
www.arrakihs-mission.eu
December 12, 2025 at 9:22 AM
arrakihs-mission.eu
A major boost for ARRAKIHS: The HARKONENS Project 💫

Led by Santi Roca Fábrega (Lund Univ.) and Corentin Cadiou (@iap.fr), has been awarded 234M CPU hours on @eurohpc-ju.bsky.social to run next-gen cosmological simulations supporting our mission.

🔗 www.arrakihs-mission.eu/2025/11/17/a...
A major boost for ARRAKIHS: The HARKONENS Project - ARRAKIHS Mission
We’re thrilled to announce a major milestone for the ARRAKIHS Project. The HARKONENS Project is led by Santi Roca Fábrega (Lund University, Sweden) in close collaboration with Corentin Cadiou (IAP, Fr...
www.arrakihs-mission.eu
November 17, 2025 at 10:08 AM
arrakihs-mission.eu
Our colleague Raúl Infante (@cefca-oaj.bsky.social ), contributor to the Data Analysis (DAT), Coordination with other Surveys (CDR) and Data Reduction (RED-SCI) work packages, gave a talk at a #UNED course on November 4th 🤗
cefca-oaj.bsky.social Centro de Estudios de Física del Cosmos de Aragón (CEFCA) @cefca-oaj.bsky.social · Nov 4
🔭 El curso de Iniciación a la #Astronomía de #UNED ha empezado mirando al espacio… desde #Teruel 💫

Como la misión espacial @arrakihs-mission.eu , la primera de la @esa.int liderada desde #España 🇪🇸

Nuestro compañero Raúl Infante, investigador del #CEFCA, fue el encargado de contarlo 🌌
November 6, 2025 at 1:42 PM
Reposted by ARRAKIHS
cefca-oaj.bsky.social
🔭 Nuestro compañero Raúl Infante, investigador del #CEFCA, abrirá el Curso de #Astronomía de la @uneduniv.bsky.social en #Teruel

Presentará @arrakihs-mission.eu , liderada por #España, cuya cámara binocular se prueba en el #OAJ ahora 🌠

ℹ️ Más info: extension.uned.es/actividad/id...
INICIACIÓN A LA ASTRONOMÍA: LA OBSERVACIÓN Y EL ESTUDIO DEL CIELO (2ª Edición). (Nueva edición) | Extensión Universitaria en Teruel | UNED
Página web de Actividades y cursos de la UNED
extension.uned.es
October 24, 2025 at 5:18 PM
arrakihs-mission.eu
Our PI, Rafael Guzmán ( @ifca.es ), presented the #ARRAKIHSmission at the Spanish Space Agency (AEE) .

We thank Juan Carlos Cortés (AEE), and Isabel Pérez Grande (AEE) , for their support and for fostering collaboration within Spain’s growing space ecosystem.

🔗 sl1nk.com/Sc443
October 29, 2025 at 9:09 AM
arrakihs-mission.eu
When small galaxies meet big ones 💫

The #AGORA project explores how dwarf satellite galaxies stop forming stars , a process called “quenching”. What #ARRAKIHS will help us uncover.

📌 Ramón Rodríguez Cardoso (@ucm.es, GMV)

🔗 goo.su/R0s4d
Gas density of the same subhalo across the different models during their infall to the host halo. Each column represents a different model, while each row indicates the same infall stage: (a) first snapshot at a distance to the host lower than , (b) at , (c) during the first apocenter, and (d) during the second infall, slightly before the second pericenter. From the time evolution we can distinguish how gas is stripped during infall and how virial radius is decreasing due to tidal stripping. Efficiency of stripping mechanisms is highly sensitive to the model.
October 20, 2025 at 8:16 AM
arrakihs-mission.eu
Last Friday, some of our @ifca.es researchers took part in the #ERN2025 in Santander.

They were with the little ones, doing #ARRAKIHS puzzles as part of the science challenge 🧩

Thank you for your collaboration! 🙌🏼

@univcantabria.bsky.social @csic.es @csicdivulga.bsky.social
October 3, 2025 at 9:39 AM
arrakihs-mission.eu
🔭📜🌌
Fossil Archives of the Universe

Joanna Sakowska ( @iaacsic.bsky.social ) explains how galactic halos reveal the history of galaxies

📹: youtu.be/3qIq8QJ3aYk
Fossil Archives of the Universe ~ How galactic halos reveal the history of galaxies
YouTube video by ARRAKIHS Mission
youtu.be
September 10, 2025 at 9:16 AM
arrakihs-mission.eu
🚀 Exciting Opportunity Alert!

We're expanding our team and looking for a Product/Quality Assurance Engineer to join ARRAKIHS Mission at Satlantis.

➡️ Click here to apply: www.satlantis.com/job/product-...

#hiring #JobAlert #JobOffer
September 5, 2025 at 9:49 AM
arrakihs-mission.eu
A map of the sky!
🟢 Green = higher sensitivity
🔵 Blue = harder to see faint details
🔴 Red dots = sample galaxies (not the final list, but an example of the #ARRAKIHS selection process).

Credit: J. Román (@ucm.es)‬
A map of the sky with sample galaxies, not the final list, but an example of how scientists build a clean selection for study.
September 1, 2025 at 11:12 AM
arrakihs-mission.eu
ARRAKIHS prepares for orbit! 🛰️

A technical training campaign at Javalambre Observatory ( #CEFCA ) tested the iSIM-170 camera, a key instrument for the mission to study dark matter from space.
🔗 bit.ly/45AxiOa

#ARRAKIHS #ESA #DarkMatter #iSIM170 #Astrophysics #OAJ
August 6, 2025 at 11:59 AM
arrakihs-mission.eu
How faint can we go? With #ARRAKIHS + VIS2, we can detect #galaxy features as dim as 31 mag/arcsec² 🌌

Using mock images, we subtracted stars, cleaned backgrounds, and applied astnoisechisel to extract even the faintest signals.

Credit: Helena Domínguez Sánchez
July 18, 2025 at 12:12 PM
arrakihs-mission.eu
Dark matter ≠ Dark energy
But what’s the difference?🤔
Alex Riley (@durham-university.bsky.social), member of WP COS and GAL, breaks it down.
📹: youtu.be/unN_h1VhbjQ
Dark matter vs Dark energy
YouTube video by ARRAKIHS Mission
youtu.be
July 7, 2025 at 11:43 AM
arrakihs-mission.eu
📻🎙️ If you missed it live, here it is: rtve.es/play/audios/...
(The #interview starts at minute 29)

#ARRAKIHS #radio #rne #neudc
Rafael Guzmán being interviewed by Pepa Fernández on "No es un día cualquiera (RNE)"
June 30, 2025 at 9:18 AM
arrakihs-mission.eu
🎙️This Sunday at 11 AM, ARRAKIHS goes on air!

Pepa Fernández interviews our Principal Investigator, Rafael Guzmán, on Spanish national radio at "No es un día cualquiera".
#rne #neudc
June 27, 2025 at 5:27 PM
arrakihs-mission.eu
🛰️ How will #ARRAKIHS reveal the invisible #universe?
Hugo Rosado (DEIMOS), Mission Planning Coordinator, explains how the mission will observe faint galaxies and uncover the structure of #darkmatter once in orbit.

🎥 youtu.be/a3IbBdOHY04
#ESA #telescope #spacemission
How will ARRAKIHS reveal the invisible universe?
YouTube video by ARRAKIHS Mission
youtu.be
June 17, 2025 at 7:43 AM
arrakihs-mission.eu
Great week at #SATLANTIS for the #ARRAKIHS Instrument Intermediate Design and Analyses Review (IIDAR) workshop 🛰️
Key step ahead of PDR, with progress, collaboration & good conversations in Leioa.
Thanks to all involved!🤗

🔗 www.arrakihs-mission.eu/2025/06/13/a...
@esa.int #SpaceMission #workshop
ARRAKIHS consortium members at the IIDAR workshop held at Satlantis.
June 13, 2025 at 12:27 PM
Reposted by ARRAKIHS
rtvenoticias.rtve.es
Arrakihs, la primera misión espacial española, busca desvelar los secretos del universo oscuro dozz.es/stleg1
Arrakihs, la primera misión espacial española, busca desvelar los secretos del universo oscuro
dozz.es
May 23, 2025 at 11:31 PM
arrakihs-mission.eu
💫 First observations with the Ground Demonstrator (OGD) at the Javalambre Astrophysical Observatory! 💫

1️⃣ M101, Pinwheel Galaxy
2️⃣ M42, Orion Nebula
3️⃣ M81, Bode’s Galaxy

#astrophysics #groundobservations #ARRAKIHS #OGD
@cefca-oaj.bsky.social #Satlantis @ifca.es
#space #mission
M101, Pinwheel Galaxy Larger than our Milky Way and bursting with star-forming regions—like cosmic fireworks in deep space. M42, Orion Nebula A stellar nursery just 1,344 light-years away, where hundreds of new stars are being born right now. M81, Bode’s Galaxy A beautiful spiral glowing with the energy of a supermassive black hole—70 million times the mass of our Sun.
May 23, 2025 at 6:15 PM
Reposted by ARRAKIHS
ieec.cat
The ground-based demonstrator of @arrakihs-mission.eu is already capturing images! 🌌

The @esa.int mission, led by @ifca.es, will provide key information about dark matter.

Researchers from #IEEC at @ice-csic.bsky.social are taking part 🔝

@cefca-oaj.bsky.social

👉 www.ieec.cat/en/arrakihs-...
May 23, 2025 at 1:52 PM