Luca Zappacosta

INAF – Astronomical Observatory of Rome

torek, 31. 5. 2011, ob 14h v F5

About half of the ordinary matter is still missing from the census of the baryons in the local universe. Cosmological simulations show that they should be hidden in the large-scale filamentary distribution of the cosmic web as warm-hot (logT=5-7 K) tenuous (10^-6 – 10^-5 cm^-3) intergalactic gas (WHIM) weakly emitting in the Far UV/X-rays and therefore very difficult to detect with current instruments. Focusing on the X-rays, where the majority of the missing baryons can be identified, I will show and discuss the most promising WHIM detections.