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QPE(Quasi Periodic Eruptions) is new type of X-ray transient event first observed in 2018. It's characterized by the periodic X-ray outbursts in contrast to its quiescent radiation. One of the proposed model for QPE events involves a secondary body orbiting around the central massive black hole, generating periodic flares as the mass of the secondary object accretes onto the BH. These systems ...
Planets between the size of Earth and Neptune, also known as sub-Neptunes, pose a conundrum. They are absent in the solar system, but more than half of all Sun-like stars in the Galaxy host a sub-Neptune interior to 1 au. Although the number of sub-Neptunes atmospheres probed so far has been very low, a major breakthrough in exo-atmospheres science is happening right now thanks to the increased...
The cosmic microwave background (CMB) holds valuable information about the early Universe, including an imprint of its mass distribution that overshadows the faint signal from primordial gravitational waves, likely generated during inflation. Removing this imprint is crucial for future CMB observations to tightly constrain the tensor-to-scalar ratio r. This talk focuses on achieving the tightes...
Galaxy clusters, as massive, virialized halos within the cosmic web, serve as ideal laboratories for advancing our understanding of cosmology, plasma physics, and the nature of dark matter. High-resolution spectroscopy in soft X-rays will open a new window to map multiphase gas in galaxy clusters and probe physics of the intracluster medium, including but not limited to chemical enrichment hist...