Speaker
Description
The warm/hot intergalactic medium (WHIM) within cosmic filaments is one of the least well-characterized baryon repositories in the local Universe. The extremely weak signals in either X-rays or the Sunyaev-Zeldovich effect challenge its robust detection. We utilize SRG/eROSITA All-Sky Survey data to examine X-ray emission from >20 Mpc long cosmic filaments. We detect the total X-ray emission spatially coincident with cosmic filaments traced by galaxy distribution with a high significance. With a further modeling of undetected active nuclei and circumgalactic medium X-ray emission, we disentangle the WHIM emission from the emission that is associated with galaxies. We also stack a broadband 100-eV resolution spectrum of cosmic filaments and probe the physical properties of the detected WHIM.
