iiinova — where your digital self keeps evolving

Kostas Migkas @kmigkas.bsky.social · 04/11/2025

Galaxy clusters and cosmology are coming together in Leiden and our upcoming Lorentz Workshop! Contact us if wishing to join! Cosmology at the Crossroads: Galaxy Clusters in the Era of Large Surveys 📅 8–12 Dec 2025 👉 www.lorentzcenter.nl/cosmology-at... #Astrophysics #Cosmology #GalaxyClusters

020

Reposted by Kostas Migkas

Scott Horton @robertscotthorton.bsky.social · 20/06/2025

Another clue about the whereabouts of the missing matter in the Universe has just emerged from amid the largest local cosmic structure. X-ray observations have revealed a massive filament of hot gas in the enormous, 8,000-galaxy strong Shapley Supercluster. www.aanda.org/articles/aa/...

aanda.org

Detection of pure warm-hot intergalactic medium emission from a 7.2 Mpc long filament in the Shapley supercluster using X-ray spectroscopy | Astronomy & Astrophysics (A&A)Mendeley

Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics

0101

Kostas Migkas @kmigkas.bsky.social · 20/06/2025

The excellent press release by ESA regarding our latest work and the first unambiguous detection of the missing baryons and warm-hot intergalactic medium in a single filament!

020

Reposted by Kostas Migkas

Astronomy & Astrophysics @aanda-journal.bsky.social · 19/06/2025

NOVA press release: Astronomers analyse huge, hot filament of missing normal matter www.astronomie.nl/nieuws/en/as... Article by Migkas et al. www.aanda.org/10.1051/0004...

astronomie.nl

Astronomers analyse huge, hot filament of missing normal matter

011

Reposted by Kostas Migkas

Astronomy & Astrophysics @aanda-journal.bsky.social · 19/06/2025

Featured image: X-ray emitting filament connecting galaxy cluster (Migkas, K., et al., 2025, A&A, 698, A270) www.aanda.org/component/is...

011

Kostas Migkas @kmigkas.bsky.social · 19/06/2025

The cosmic filament is 7.2 Mpc long, exhibits ~20% excess emission compared to the background, has a temperature of ~1 keV, gas particle density of ~10^-5/cm^3, and a baryon overdensity of ~35, making it the first pristine single filament ever detected in Xrays!

110

Kostas Migkas @kmigkas.bsky.social · 19/06/2025

We apply a novel method to isolate the missing baryons/WHIM emission from surrounding clusters and X-ray bright black holes thanks to Suzaku's sensitivity to diffuse, faint sources and XMM's power for studying black hole emission. Using X-ray spectroscopy, we find:

100

Kostas Migkas @kmigkas.bsky.social · 19/06/2025

📢Paper and press releases day! We report the first-ever unambiguous detection of WHIM/missing baryons in a single cosmic filament using @ESA_XMM and @JAXA_en Suzaku data! It's the first time observations agree with LCDM simulations for the nature of WHIM www.aanda.org/articles/aa/...

aanda.org

Detection of pure warm-hot intergalactic medium emission from a 7.2 Mpc long filament in the Shapley supercluster using X-ray spectroscopy | Astronomy & Astrophysics (A&A)Mendeley

Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics

121

Kostas Migkas @kmigkas.bsky.social · 29/05/2025

Delighted to share that I got yet another research grant from @unileiden.bsky.social and the Fonds Rijke-Hamaker fund! 🥳 This grant will support my analysis of new X-ray data of galaxy clusters that will eventually help us further refine our understanding of the uniformity of cosmic expansion!

010

Kostas Migkas @kmigkas.bsky.social · 15/05/2025

🚀 Exciting news! Our proposal for the Lorentz Workshop, focusing on Cosmology with Galaxy Clusters is approved for 8–12 Dec 2025 🎉 @lorentzcenter.bsky.social , @unileiden.bsky.social We'll bring together cluster enthusiasts and dive into the latest in cluster cosmology! tinyurl.com/lorentzclust...

lorentzcenter.nl

Center for Scientific Workshops in All Disciplines - Cosmology at the Crossroads: Galaxy Clusters in the Era of Large Surveys

010

Kostas Migkas @kmigkas.bsky.social · 14/05/2025

(My first post) I'm thrilled to receive an NWO Open Competition grant to test the uniformity of cosmic expansion at local and distant cosmic scales, using eROSITA and @esa.int XMM-Newton data of X-ray galaxy clusters! This means I get to stay longer at Leiden Observatory 🥳 tinyurl.com/NWOgrant

universiteitleiden.nl

Three NWO Open Competition grants for Leiden scientists

Smart drug carriers, uneven cosmic expansion, and solar energy storage in molecules. These are the topics of three newly awarded NWO-XS grants to researchers at the Faculty of Science.

021