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Discovery of a Featureless Tidal Disruption Event at z ∼ 1 with the Wide Field Survey Telescope

Jiazheng Zhu et al 2026 ApJL 1004 L10
Discovered just 6 billion years after the Big Bang, AT2025wet is the highest-redshift non-jetted tidal disruption event known, allowing researchers to probe the missing-energy puzzle.

The post Discovery of a Featureless Tidal Disruption Event at <em>z</em> ∼ 1 with the Wide Field Survey Telescope appeared first on AAS Nova.

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Disk Lifetime Distribution as a Function of the Mass of Host Star

Susanne Pfalzner et al 2026 ApJ 1003 119
The disks around young high-mass stars survive for roughly 3.72 million years, and those around low-mass stars survive for 7.20 million years, though the distributions for both populations are quite broad.

The post Disk Lifetime Distribution as a Function of the Mass of Host Star appeared first on AAS Nova.

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A Natural ≳100Γ— Telescope: Discovery of the Strongly Lensed Type II SN 2025mkn at z = 1.37

Cameron Lemon et al 2026 ApJL 1003 L47
Researchers have discovered a supernova that occurred when the universe was roughly 5 billion years old; if the supernova’s luminosity is similar to that of nearby events, it must have been magnified by a factor of 250.

The post A Natural ≳100Γ— Telescope: Discovery of the Strongly Lensed Type II SN 2025mkn at <em>z</em> = 1.37 appeared first on AAS Nova.

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Magnetic Activity in X-Ray Stars from eROSITA: Insights from the TESS and LAMOST Surveys

Lulu Xu et al 2026 ApJS 284 54
Of 7,229 flares from 1,430 stars, most came from stars with temperatures below 4000K and rotation periods shorter than 4 days; most flares lasted less than 2 hours.

The post Magnetic Activity in X-Ray Stars from eROSITA: Insights from the TESS and LAMOST Surveys appeared first on AAS Nova.

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Trends in the Population of Binary Black Holes Following the Fourth Gravitational-Wave Transient Catalog: A Data-Driven Analysis

Nir Guttman et al 2026 ApJ 996 144
An analysis of the fourth gravitational wave catalog supports the existence of a gap at 45 solar masses in the secondary black hole mass distribution, among other findings.

The post Trends in the Population of Binary Black Holes Following the Fourth Gravitational-Wave Transient Catalog: A Data-Driven Analysis appeared first on AAS Nova.

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