output
19992026
most citedThe Seventh Data Release of the Sloan Digital Sky Survey

5.4k citations

Showing 2026 · astro-ph.HEShow all

25 papers · 2 filters

astro-ph.HE2026

Shortening the Baseline: Characterising Type Ia Supernovae Using

Joel M. Velasco, Paolo A. Mazzali, Christopher Ashall +8

An explorative study of Type Ia Supernovae (SNe Ia) light curves is presented. decline-rate metrics are used to evaluate alternative characterisations of light curve di…

astro-ph.HE2026

Constraints on the VHE counterpart of two binary black hole mergers observed by the MAGIC and CTAO LST-1 telescopes

K. Abe, S. Abe, J. Abhir +358

We present very-high-energy gamma-ray observations of two binary black hole merger candidates, GW240615_113620 and GW241125_010116, performed with the Major Atmospheric Gamma Imagi…

astro-ph.HE2026

SN 2022erq: A Superluminous Thermonuclear Supernova with Escalating Preexplosion Mass Loss

Qian Zhai, Jujia Zhang, Xiaofeng Wang +51

We present a photometric and spectroscopic study of the superluminous Type Ia supernova SN 2022erq. Its early spectra, dominated by iron-group elements with weak intermediate-mass…

astro-ph.HE2026

Magnetorotational instabilities in solids: Application to neutron-star crusts

Arthur G. Suvorov, Thomas Celora, Kostas D. Kokkotas

The magnetorotational instability can generate strong, turbulent substructure within magnetized shear flows. The efficacy of the mechanism as a function of microphysical aspects of…

astro-ph.HE2026★ 2 cited

Population synthesis of Galactic middle-aged pulsar wind nebulae I. Detection prospects for current and future instruments

A. De Sarkar, D. F. Torres, B. Olmi +2

Pulsar wind nebulae (PWNe) constitute the largest population of Galactic very-high-energy (VHE; GeV) -ray sources and are key laboratories for studying particle accele…

astro-ph.HE2026

Late-time evolution of the interacting stripped-envelope supernova 2017dio

C. Humina, C. P. Gutiérrez, H. Kuncarayakti +14

The discovery of stripped-envelope supernovae (SNe) interacting with dense circumstellar medium (CSM) challenges our current understanding of massive star evolution. We present lat…

astro-ph.HE2026

The X-ray emission of the long-period transient and accreting cataclysmic variable ASKAP J174508.9-505149

M. Imbrogno, M. Veresvarska, Y. L. Wang +8

Long-period transients (LPTs) challenge our knowledge of the mechanism producing radio periodic pulsations in compact objects. Some LPTs have been associated with systems hosting a…

astro-ph.HE2026

Detection of persistent helium absorption in the 91bg-like type Ia Supernova 2022an

Ping Chen, Avishay Gal-Yam, Subo Dong +14

We present optical and near-infrared observations of the fast-declining Type Ia supernova (SN Ia) 2022an. The photometric and spectroscopic properties identify it as a standard 91b…

astro-ph.HE2026

Exploring the nature of Galactic unassociated sources detected by the Fermi-LAT

F. Acero, A. Acharyya, A. Adelfio +120

We investigate the nature of the unassociated sources detected by the Fermi-LAT close (|b|<10°) to the Galactic plane, representing 16% of all sources in the 4FGL-DR4 catalog. The…

astro-ph.HE2026★ 3 cited

Periodic Radio and X-ray Emission from an Accreting White Dwarf Binary

Kovi Rose, Joshua Pritchard, Tara Murphy +26

Long period radio transients (LPTs) are coherent bursts of polarised radio emission that repeat periodically on timescales of minutes to hours. Little is known about the physical o…

astro-ph.HE2026

Fast radio bursts, magnetars and earthquakes: their "family feud"?

Si-Lu Xu, Yong-Kun Zhang, Pei Wang +24

Fast radio bursts (FRBs) are millisecond-duration cosmic transients whose origin remains elusive. Competing models invoke either earthquake-like processes or flare-like mechanisms.…

astro-ph.HE2026

Extreme Transients in Gamma Rays

Daniela Hadasch, Dmitriy Khangulyan

Extreme gamma-ray transients represent some of the most energetic and physically constraining phenomena in high-energy astrophysics. They are characterized by rapid, large-amplitud…

astro-ph.HE2026★ 2 cited

Gamma-ray signature of superluminous supernovae: Fermi-LAT GeV detection of SN 2017egm and evidence of a central engine

F. Acero, A. Acharyya, A. Adelfio +116

Superluminous supernovae (SLSNe) are a rare class of transients with peak luminosities 10-100 times greater than those of standard core-collapse supernovae (SNe). The mechanisms po…

astro-ph.HE2026

GRB 260310A / SN 2026fgk: A Multi-Wavelength Study of a Nearby Underluminous Long GRB and SN with a Complex Afterglow

Ramandeep Gill, Rosa L. Becerra, Antonio de Ugarte Postigo +54

We present a comprehensive multi-wavelength study of GRB 260310A / SN 2026fgk, a nearby (), long-duration gamma-ray burst (GRB) with an exceptionally underluminous prompt…

astro-ph.HE2026

Relative frequencies of core-collapse supernovae as a function of metallicity: observations vs theoretical predictions

Claudia P. Gutiérrez, Lluís Galbany, Joseph P. Anderson +4

Understanding supernova (SN) progenitors remains a major challenge in astrophysics, as it involves untangling the complex interplay between stellar physics (e.g., evolution, binari…

astro-ph.HE2026

Chasing Gamma-Ray Signals from Binary Neutron Star Coalescences with the Cherenkov Telescope Array: Prospects and Observing Strategies

S. Abe, J. Abhir, A. Abhishek +457

The detection of gravitational waves (GWs) from a binary neutron star (BNS) merger by Advanced LIGO and Advanced Virgo (GW170817), together with its electromagnetic counterpart, th…

astro-ph.HE2026

A high-resolution X-ray view of the ultra-fast outflow in MAXI J1810-222

C. Pinto, M. Del Santo, A. D'Aì +10

In previous work, it was reported that the Galactic black hole candidate MAXI J1810-222 exhibited a notable absorption spectral feature at around 1 keV in low-resolution X-ray spec…

astro-ph.HE2026

Long Period Transients (LPTs): a comprehensive review

Nanda Rea, Natasha Hurley-Walker, Manisha Caleb

Long Period Transients (LPTs) are a recently identified class of sources characterized by periodic radio bursts lasting seconds to minutes, with flux densities that might reach sev…

astro-ph.HE2026

A MeerKAT search for persistent radio sources towards twenty-five localised Fast Radio Bursts

Lebogang L. Mfulwane, James O. Chibueze, Thulo P. Letsele +17

The discovery of persistent radio sources (PRSs) associated with repeating fast radio bursts (FRBs) has shed light on the immediate environments and possible progenitors of these F…

astro-ph.HE2026

The nearby He-rich superluminous supernova SN 2021bnw during photospheric phases

A. Fiore, A. Kozyreva, L. Yan +40

Aim. We present and interpret the data of the nearby hydrogen-deficient but helium-rich superluminous supernova SN 2021bnw which reached a magnitude of -20.7 at maximum luminosity…

astro-ph.HE2026

ICM-SHOX III. The case of MACS J0018.5+1626, a radio relic that looks like a radio halo?

P. Domínguez-Fernández, J. A. ZuHone, E. M. Silich +9

We present the first detailed numerical modeling of the radio emission from MACS J0018.5+1626 as part of the Improved Constraints on Mergers with SZ, Hydrodynamical simulations, Op…

astro-ph.HE2026

An infrared echo from a circumstellar disk in the hydrogen- and helium-poor SN 2024aecx

Samaporn Tinyanont, Kittipong Wangnok, Jennifer E. Andrews +34

We present near-infrared (NIR) spectroscopy of the hydrogen- and helium-poor (Type Ic) supernova (SN) 2024aecx, which displays a strong NIR excess emerging 32 days post peak. SN 20…

astro-ph.HE2026

Investigating the emission signatures of pulsar halo candidate HESS J1813-126

Agnibha De Sarkar

Extended gamma-ray sources surrounding middle-aged pulsars, primarily observed at teraelectronvolt energies, have been interpreted as pulsar halos, where relativistic diffu…

astro-ph.HE2026

Early results in the search for extreme coronal line emitters with the Dark Energy Spectroscopic Instrument

Peter Clark, Joseph Callow, Or Graur +44

Here we present the results of our search through the Early Data Release (EDR) of the Dark Energy Spectroscopic Instrument (DESI) for extreme coronal line emitters (ECLEs) - a rare…