Astrophysics · Physics & Astronomy
High Energy Astrophysical Phenomena
The newest papers in High Energy Astrophysical Phenomena that ReadSearch has read, newest first. Each links to its own page, with its authors, date, where it was published and the original.
189 papers, from 21 September 2026 to 5 November 2026: 189 arXiv preprints.
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Newest papers, page 8
Detection of kilosecond hard lags in the new pulsating ULX candidate NGC 7456 ULX-1
Ultraluminous X-ray sources (ULXs) are thought to be powered, in many cases, by super-Eddington accretion onto compact objects.The Impact of a Clumpy Ambient Medium on the Dynamics and Synchrotron Emission of AGN Jets
Relativistic jets from AGN are expected to propagate through an inhomogeneous ISM, but the role of small-scale gas inhomogeneities in shaping their early evolution remains uncertain.Neutrino flavor instabilities intermediate between slow and fast
The neutrino flavor composition in supernovae and neutron star mergers is shaped by flavor instabilities, which are commonly classified into three types: slow (SFI), fast (FFI), and collisional (CFI).Separating the Optical to Near-Infrared Light of AGN and Their Host Galaxies
The properties of galaxies that host active galactic nuclei (AGNs) offer clues to the conditions that enable accretion onto supermassive black holes.Deep radio characterization of the supernova remnant G343.1-00.7
Supernova remnants (SNRs) are extended radio sources whose morphology and evolution are shaped by the interaction of strong shocks with the surrounding medium.Gaia neutron stars: demographics, birth rates, and connections to other neutron star populations
Gaia DR3 revealed a new class of neutron stars (NSs) in au-scale orbits with solar-type companions.XClass: An Automated Multiwavelength Machine-Learning Pipeline for Classification of Extragalactic X-ray Sources. I. Pipeline Description
Most X-ray sources detected in nearby galaxies by the Chandra X-ray Observatory lack astrophysical classifications.The impact of relativistic AGN jets on realistic galaxy cluster environments
Low-power FRI-like radio jets dominate the AGN population, yet the main mechanism of heating the intracluster medium (ICM) and its efficiency remain a matter of debate.Detecting Extragalactic Exoplanets With Fast Radio Burst Nanolensing
Fast Radio Bursts (FRBs) are spatially and temporally compact sources at cosmological distances.The Irreversible Depletion of Dark Matter Spikes by Extreme-Mass-Ratio Inspirals
Dense dark matter spikes around massive black holes (MBHs) have been widely predicted to produce gravitational-wave dephasing in extreme-mass-ratio inspirals (EMRIs) that are potentially observable…Fooled by mass? Recovering the $Γ-λ_{Edd}$ relation of quasars from their X-ray variability
We measure the relation between the X-ray photon index $Γ$ and the Eddington ratio $λ_{Edd}$ in unobscured type-1 quasars, using as parent sample the cross-match of the SDSS DR16Q catalogue with the…X-ray measurements of the elemental abundances for the diffuse emission in the nuclear starburst galaxy NGC 3079
Outflows driven by feedback leave imprints on a galaxy's diffuse X-ray emission.Not So Heavy Metal I: Low Metallicity Enhances the Rate of high-redshift Superluminous Supernovae
Type-I superluminous supernovae (SLSNe) are extremely luminous stellar explosions originating from the core collapse of massive stars.An X-ray Extremely wide-field Spectroscopic Surveyor (XESS, or "chess")
We propose an X-ray observatory, the X-ray Extremely wide-field Spectroscopic Surveyor (XESS, pronounced "Chess") to bring high energy resolution X-ray spectroscopy into the era of synoptic surveys…Revealing the accretion disc structure in Changing State AGN: NGC1566
NGC1566 is a low mass ($\sim 6\times 10^6M_\odot$) Active Galactic Nuclei (AGN) with unusual large amplitude variabilty in its accretion flow.Cosmic-neighbor-associated distances to VHE and candidate VHE BL Lacs via SDSS photometric redshifts
BL Lac objects have distances that are difficult to estimate because their optical spectra rarely show identifiable emission or absorption lines.NEXUS: Discovery of a Luminous Young Transient at $z=5$
We report the discovery of AT 2026abck, a young transient in a star-forming galaxy at $z=5.017\pm0.001$, identified from Year-2 observations of the NEXUS JWST treasury program.A triple-induced merger in T Ori C, solves the proplyd lifetime problem and the curiously young shell of M42
There has long been a tension between the stellar ages in the Orion Nebula Cluster and the rapid external photoevaporation of its protoplanetary discs.Comment on "Fermi-LAT Galactic Center Excess Morphology of Dark Matter in Simulations of the Milky Way Galaxy"
Muru et al. [Phys.Discovery of over a thousand variable stars in Terzan 5 and Liller 1 with JWST
The Bulge Fossil Fragments Terzan 5 and Liller 1 host some of the densest stellar environments in the Galaxy, yet their variable star populations have remained largely unexplored due to crowding and…