Kostas Migkas
@kmigkas.bsky.social
Oort fellow at Leiden Observatory. Working on X-ray galaxy clusters and observational cosmology. Dad and husband.
Finally, Astronomy & Astrophysics made us their Featured Image 🙂 www.aanda.org/2025-highlig...
Astronomy & Astrophysics (A&A)
Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics
www.aanda.org
June 19, 2025 at 8:39 AM
Finally, Astronomy & Astrophysics made us their Featured Image 🙂 www.aanda.org/2025-highlig...
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!
June 19, 2025 at 8:38 AM
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!
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:
June 19, 2025 at 8:37 AM
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:
Several press releases from @esa.int @unileiden.bsky.social @unibonn.bsky.social @sronspace.bsky.social and others are out!
www.esa.int/Science_Expl...
www.esa.int/Science_Expl...
“The models were right”: astronomers find ‘missing’ matter
Astronomers have discovered a huge filament of hot gas bridging four galaxy clusters. At 10 times as massive as our galaxy, the thread could contain some of the Universe’s ‘missing’ matter, addressing...
www.esa.int
June 19, 2025 at 8:35 AM
Several press releases from @esa.int @unileiden.bsky.social @unibonn.bsky.social @sronspace.bsky.social and others are out!
www.esa.int/Science_Expl...
www.esa.int/Science_Expl...