output
19932026
most citedPrimordial Black Hole Scenario for the Gravitational-Wave Event GW150914

934 citations

Showing 2021 · astro-ph.HEShow all

21 papers · 2 filters

astro-ph.HE2021★ 15 cited

H.E.S.S. follow-up observations of Binary Black Hole Coalescence events during the second and third Gravitational Waves observing runs of Advanced LIGO and Advanced Virgo

H. E. S. S. collaboration, :, H. Abdalla +151

We report on the observations of four well-localized binary black hole (BBH) mergers by the High Energy Stereoscopic System (H.E.S.S.) during the second and third observing runs of…

astro-ph.HE2021★ 41 cited

Search for Gravitational Waves Associated with Gamma-Ray Bursts Detected by Fermi and Swift During the LIGO-Virgo Run O3b

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1632

We search for gravitational-wave signals associated with gamma-ray bursts detected by the Fermi and Swift satellites during the second half of the third observing run of Advanced L…

astro-ph.HE2021★ 96 cited

All-sky search for gravitational wave emission from scalar boson clouds around spinning black holes in LIGO O3 data

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1669

This paper describes the first all-sky search for long-duration, quasi-monochromatic gravitational-wave signals emitted by ultralight scalar boson clouds around spinning black hole…

astro-ph.HE2021★ 74 cited

Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1694

We present a targeted search for continuous gravitational waves (GWs) from 236 pulsars using data from the third observing run of LIGO and Virgo (O3) combined with data from the se…

astro-ph.HE2021★ 38 cited

High-entropy ejecta plumes in Cassiopeia A from neutrino-driven convection

Toshiki Sato, Keiichi Maeda, Shigehiro Nagataki +6

Recent multi-dimensional simulations suggest that high-entropy buoyant plumes help massive stars to explode. Outwardly protruding iron-rich fingers in the galactic supernova remnan…

astro-ph.HE2021★ 13 cited

Searching for TeV gamma-ray emission from SGR\,1935+2154 during its 2020 X-ray and radio bursting phase

H. E. S. S. Collaboration, :, H. Abdalla +251

Magnetar hyperflares are the most plausible explanation for fast radio bursts (FRB) -- enigmatic powerful radio pulses with durations of several milliseconds and high brightness te…

astro-ph.HE2021★ 24 cited

Observation of the gamma-ray binary HESS J0632+057 with the H.E.S.S., MAGIC, and VERITAS telescopes

C. B. Adams, W. Benbow, A. Brill +409

The results of gamma-ray observations of the binary system HESS J0632+057 collected during 450 hours over 15 years, between 2004 and 2019, are presented. Data taken with the atmosp…

astro-ph.HE2021★ 61 cited

Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1634

Results are presented of searches for continuous gravitational waves from 20 accreting millisecond X-ray pulsars with accurately measured spin frequencies and orbital parameters, u…

astro-ph.HE2021★ 13 cited

LMC N132D: A mature supernova remnant with a power-law gamma-ray spectrum extending beyond 8 TeV

H. E. S. S. Collaboration, :, H. Abdalla +233

We analyzed 252 hours of High Energy Stereoscopic System (H.E.S.S.) observations towards the supernova remnant (SNR) LMC N132D that were accumulated between December 2004 and March…

astro-ph.HE2021★ 14 cited

Search for dark matter annihilation signals from unidentified Fermi-LAT objects with H.E.S.S

H. E. S. S. Collaboration, H. Abdallah, F. Aharonian +226

Cosmological -body simulations show that Milky Way-sized galaxies harbor a population of unmerged dark matter subhalos. These subhalos could shine in gamma-rays and be eventuall…

astro-ph.HE2021★ 24 cited

Evidence of 100 TeV -ray emission from HESS J1702-420: A new PeVatron candidate

H. Abdalla, F. Aharonian, F. Ait Benkhali +232

The identification of PeVatrons, hadronic particle accelerators reaching the knee of the cosmic ray spectrum (few eV), is crucial to understand the origin of cosmic rays…

astro-ph.HE2021★ 172 cited

Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow

H. E. S. S. Collaboration

Gamma-ray bursts (GRBs), which are bright flashes of gamma rays from extragalactic sources followed by fading afterglow emission, are associated with stellar core collapse events.…

astro-ph.HE2021★ 9 cited

Broad-Band High-Energy Emission of the Gamma-ray Binary System LS 5039: Spectral and Temporal Features using NuSTAR and Fermi Observations

Hiroki Yoneda, Dmitry Khangulyan, Teruaki Enoto +4

We report on detailed analysis of the hard X-ray and GeV gamma-ray spectra of LS 5039, one of the brightest gamma-ray binary system in the Galaxy. The NuSTAR observation covering i…

astro-ph.HE2021★ 20 cited

Fast radio bursts by high-frequency synchrotron maser emission generated at the reverse shock of a powerful magnetar flare

Dmitry Khangulyan, Maxim V. Barkov, Sergey B. Popov

We consider a magnetar flare model for fast radio bursts (FRBs). We show that millisecond burst of sufficient power can be generated by synchrotron maser emission ignited at the re…

astro-ph.HE2021★ 91 cited

Search for intermediate mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration

Intermediate-mass black holes (IMBHs) span the approximate mass range --, between black holes (BHs) formed by stellar collapse and the supermassive BHs at the c…

astro-ph.HE2021★ 17 cited

Gamma-ray and Neutrino Signals from Accretion Disk Coronae of Active Galactic Nuclei

Yoshiyuki Inoue, Dmitry Khangulyan, Akihiro Doi

To explain X-ray spectra of active galactic nuclei (AGN), non-thermal activity in AGN coronae such as pair cascade models has been extensively discussed in the past literature. Alt…

astro-ph.HE2021★ 19 cited

Search for dark matter annihilation in the dwarf irregular galaxy WLM with H.E.S.S

H. E. S. S. Collaboration, H. Abdallah, R. Adam +232

We search for an indirect signal of dark matter through very high-energy gamma rays from the Wolf-Lundmark-Melotte (WLM) dwarf irregular galaxy. The pair annihilation of dark matte…

astro-ph.HE2021★ 25 cited

Discovery of the Highly-Neutronized Ejecta Clump with Enhanced Abundances of Titanium and Chromium in the Type Ia Supernova Remnant 3C 397

Yuken Ohshiro, Hiroya Yamaguchi, Shing-Chi Leung +7

The supernova remnant (SNR) 3C 397 is thought to originate from a Type Ia supernova (SN Ia) explosion of a near-Chandrasekhar-mass () progenitor, based on the enhanced…

astro-ph.HE2021★ 21 cited

Spatially Resolved RGS Analysis of Kepler's Supernova Remnant

Tomoaki Kasuga, Jacco Vink, Satoru Katsuda +4

The distribution and kinematics of the circumstellar medium (CSM) around a supernova remnant (SNR) tell us useful information about the explosion of its natal supernova (SN). Keple…

astro-ph.HE2021★ 7 cited

On the origin of the asymmetry of the ejecta structure and explosion of G350.10.3

Tomoya Tsuchioka, Yasunobu Uchiyama, Ryota Higurashi +4

We present X-ray analysis of the ejecta of supernova remnant G350.10.3 observed with Chandra and Suzaku, and clarify the ejecta's kinematics over a decade and obtain a new obser…

astro-ph.HE2021

Machine learning application to Fermi-LAT data: sharpening all-sky map and emphasizing variable sources

Shogo Sato, Jun Kataoka, Soichiro Ito +6

A novel application of machine-learning (ML) based image processing algorithms is proposed to analyze an all-sky map (ASM) obtained using the Fermi Gamma-ray Space Telescope. An at…