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We present the detection of the kinetic Sunyaev-Zeldovich effect (kSZE) signals from groups of galaxies as a function of halo mass down to $log (M_{500}/{rm M_odot}) sim 12.3$, using the {it Planck} CMB maps and stacking about $40,000$ galaxy systems with known positions, halo masses, and peculiar velocities. The signals from groups of different mass are constrained simultaneously to take care of projection effects of nearby halos. The total kSZE flux within halos estimated implies that the gas fraction in halos is about the universal baryon fraction, even in low-mass halos, indicating that the `missing baryons are found. Various tests performed show that our results are robust against systematic effects, such as contamination by infrared/radio sources and background variations, beam-size effects and contributions from halo exteriors. Combined with the thermal Sunyaev-Zeldovich effect, our results indicate that the `missing baryons associated with galaxy groups are contained in warm-hot media with temperatures between $10^5$ and $10^6,{rm K}$.
We present the detection of the kinetic Sunyaev-Zeldovich effect (kSZE) signals from groups of galaxies as a function of halo mass down to $log (M_{500}/{rm M_odot}) sim 12.3$, using the {it Planck} CMB maps and stacking about $40,000$ galaxy systems
We estimate the amount of the {it missing baryons} detected by the Planck measurements of the cosmic microwave background in the direction of Central Galaxies (CGs) identified in the Sloan galaxy survey. The peculiar motion of the gas inside and arou
We report the direct detection of the kinetic Sunyaev-Zeldovich (kSZ) effect in galaxy clusters with a 3.5 sigma significance level. The measurement was performed by stacking the Planck map at 217 GHz at the positions of galaxy clusters from the Wen-
The nature and energetics of feedback from thermal winds in quasars can be constrained via observations of the Sunyaev-Zeldovich Effect (SZE) induced by the bubble of thermal plasma blown into the intergalactic medium by the quasar wind. In this lett
Motivated by the observed shortfall of baryons in the local universe, we investigate the ability of high resolution cosmic microwave background (CMB) experiments to detect hot gas in the outer regions of nearby group halos. We construct hot gas model