The temperature and metallicity distributions of the ICM: insights with TNG-Cluster for XRISM-like observations

01/04/2026 - High-Energy

The new era of high-resolution X-ray spectroscopy will significantly improve our understanding of the intracluster medium (ICM) by providing precise constraints on its underlying physical properties. However, spectral fitting requires reasonable assumptions on the thermal and chemical distributions of the gas. We use the output of TNG-Cluster, the newest addition to the IllustrisTNG suite of…

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Asymmetric Distribution of Fe-peak Elements in Cassiopeia A Revealed by XRISM

01/04/2026 - High-Energy

The elemental abundances of the Fe-peak elements (such as Cr, Mn, Fe, and Ni) and Ti are important for understanding the environment of explosive nuclear burning for the core-collapse supernovae (CCSNe). In particular, the supernova remnant Cassiopeia A (Cas A), which is well known for its asymmetric structure, contains three “Fe-rich blobs,” and the composition…

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A JWST Transit of a Jupiter Analog. I. Constraints on the Oblateness of Kepler-167 e

01/03/2026 - Exoplanets

In 2024 October, JWST observed a transit of Kepler-167 e, a Jupiter-analog planet on a 1000+ day orbit. These observations, recorded over a long baseline of nearly 60 hr, were designed to search for signatures of planetary oblateness and/or exomoons comparable to Ganymede. In this first in a series of studies analyzing these data, we…

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