output
20082026
most citedFirst M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

4.3k citations

Showing 2020 · astro-ph.HEShow all

22 papers · 2 filters

astro-ph.HE2020★ 7 cited

An X-ray study for white dwarf binary AR Scorpii

J. Takata, X. F. Wang, H. H. Wang +4

We report a study of the X-ray emission from the white dwarf/M-type star binary system AR Scorpii using archival data taken in 2016-2020. It has been known that the X-ray emission…

astro-ph.HE2020★ 51 cited

Diving below the spin-down limit: Constraints on gravitational waves from the energetic young pulsar PSR J0537-6910

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1589

We present a search for continuous gravitational-wave signals from the young, energetic X-ray pulsar PSR J0537-6910 using data from the second and third observing runs of LIGO and…

astro-ph.HE2020★ 47 cited

The Cosmic-Ray Composition between 2 PeV and 2 EeV Observed with the TALE Detector in Monocular Mode

Telescope Array Collaboration

We report on a measurement of the cosmic ray composition by the Telescope Array Low-Energy Extension (TALE) air fluorescence detector (FD). By making use of the Cherenkov light sig…

astro-ph.HE2020★ 39 cited

Search for Gravitational Waves Associated with Gamma-Ray Bursts Detected by Fermi and Swift During the LIGO-Virgo Run O3a

The LIGO Scientific Collaboration, the Virgo Collaboration, R. Abbott +1250

We search for gravitational-wave transients associated with gamma-ray bursts detected by the Fermi and Swift satellites during the first part of the third observing run of Advanced…

astro-ph.HE2020★ 9 cited

A multi-wavelength study of PSR J11196127 after 2016 outburst

H. -H. Wang, L. C. -C. Lin, S. Dai +4

PSR~J11196127, a high-magnetic field pulsar detected from radio to high-energy wavelengths, underwent a magnetar-like outburst beginning on July 27, 2016. In this paper, we stud…

astro-ph.HE2020★ 13 cited

Modeling of Cosmic-Ray Production and Transport and Estimation of Gamma-Ray and Neutrino Emissions in Starburst Galaxies

Ji-Hoon Ha, Dongsu Ryu, Hyesung Kang

Starburst galaxies (SBGs) with copious massive stars and supernova (SN) explosions are the sites of active cosmic-ray production. Based on the predictions of nonlinear diffusive sh…

astro-ph.HE2020★ 28 cited

Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment

Telescope Array Collaboration, R. U. Abbasi, M. Abe +141

Motivated by the detection of a significant dipole structure in the arrival directions of ultrahigh-energy cosmic rays above 8 EeV reported by the Pierre Auger Observatory (Auger),…

astro-ph.HE2020★ 4 cited

Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-High Energy Cosmic Rays

Telescope Array Collaboration, R. U. Abbasi, M. Abe +140

Evidence for a large-scale supergalactic cosmic ray multiplet (arrival directions correlated with energy) structure is reported for ultra-high energy cosmic ray (UHECR) energies ab…

astro-ph.HE2020★ 99 cited

Gravitational-wave constraints on the equatorial ellipticity of millisecond pulsars

The LIGO Scientific Collaboration, the Virgo Collaboration, R. Abbott +1333

We present a search for continuous gravitational waves from five radio pulsars, comprising three recycled pulsars (PSR J0437-4715, PSR J0711-6830, and PSR J0737-3039A) and two youn…

astro-ph.HE2020★ 10 cited

Accretion Flow Properties of GRS 1915+105 During Its Class Using AstroSat Data

Anuvab Banerjee, Ayan Bhattacharjee, Debjit Chatterjee +4

The Galactic microquasar GRS 1915+105 shows rich variability which is categorized into different classes. In this paper, we report temporal and spectral analysis of GRS 1915+105 to…

astro-ph.HE2020★ 1.8k cited

GW190814: Gravitational Waves from the Coalescence of a 23 M Black Hole with a 2.6 M Compact Object

The LIGO Scientific Collaboration, the Virgo Collaboration, R. Abbott +1254

We report the observation of a compact binary coalescence involving a 22.2 - 24.3 black hole and a compact object with a mass of 2.50 - 2.67 (all measuremen…

astro-ph.HE2020★ 7 cited

On the influence of supra-thermal particle acceleration on the morphology of low-Mach, high- shocks

Allard Jan van Marle

When two galaxy clusters encounter each other, the interaction results in a collisionless shock that is characterized by a low (1-4) sonic Mach number, and a high Alfv{é}nic Mach n…

astro-ph.HE2020★ 21 cited

Measurement of the Proton-Air Cross Section with Telescope Array's Black Rock Mesa and Long Ridge Fluorescence Detectors, and Surface Array in Hybrid Mode

R. U. Abbasi, M. Abe, T. Abu-Zayyad +140

Ultra high energy cosmic rays provide the highest known energy source in the universe to measure proton cross sections. Though conditions for collecting such data are less controll…

astro-ph.HE2020★ 7 cited

AstroSat Observation of Non-Resonant Type-C QPOs in MAXI J1535-571

D. Chatterjee, D. Debnath, A. Jana +8

Galactic transient black hole candidate (BHC) MAXI J1535-571 was discovered on 2017 September 02 simultaneously by {\it MAXI}/GSC and {\it Swift}/BAT instruments. It has also been…

astro-ph.HE2020★ 6 cited

A deep X-ray spectral imaging of the bow-shock pulsar wind nebula associated with PSR B1929+10

Sangin Kim, C. Y. Hui, Jongsu Lee +3

In this work, we study the X-ray bow-shock nebula powered by the mature pulsar PSR B1929+10 using data from XMM-Newton, with an effective exposure of 300 ks, offering the de…

astro-ph.HE2020★ 10 cited

Searches for Pulsar-like Candidates from Unidentified Objects in the Third Catalog of Hard Fermi-LAT (3FHL) sources with Machine Learning Techniques

C. Y. Hui, Jongsu Lee, K. L. Li +7

We report the results of searching pulsar-like candidates from the unidentified objects in the Catalog of Hard Fermi-LAT sources (3FHL). Using a machine-learning based…

astro-ph.HE2020★ 25 cited

Limiting the shock acceleration of cosmic-ray protons in the ICM

Denis Wittor, Franco Vazza, Dongsu Ryu +1

Observations of large-scale radio emissions prove the existence of shock accelerated cosmic-ray electrons in galaxy clusters, while the lack of detected -rays limits the acceler…

astro-ph.HE2020★ 683 cited

GW190412: Observation of a Binary-Black-Hole Coalescence with Asymmetric Masses

The LIGO Scientific Collaboration, the Virgo Collaboration, R. Abbott +1254

We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO's and Virgo's third observing run. The signal was recorded…

astro-ph.HE2020★ 21 cited

A Joint Fermi-GBM and LIGO/Virgo Analysis of Compact Binary Mergers From the First and Second Gravitational-wave Observing Runs

ray Burst Monitor Team, the LIGO Scientific Collaboration, the Virgo Collaboration +1262

We present results from offline searches of Fermi Gamma-ray Burst Monitor (GBM) data for gamma-ray transients coincident with the compact binary coalescences observed by the gravit…

astro-ph.HE2020★ 22 cited

Repeated state change of variable gamma-ray pulsar, PSR J2021+4026

J. Takata, H. H. Wang, L. C. C. Lin +6

PSR J2021+4026 is a radio-quiet gamma-ray pulsar and the first pulsar that shows state change of the gamma-ray emission and spin-down rate. The state change of PSR J2021+4026 was f…

astro-ph.HE2020★ 7 cited

A multi-wavelength study of the gamma-ray binary candidate HESS J1832-093

Pak-Hin Thomas Tam, K. K. Lee, Yudong Cui +6

We investigate the nature of the unidentified very-high-energy (VHE) gamma-ray object, HESS J1832-093, in a multi-wavelength context. Based on X-ray variability and spectral index…

astro-ph.HE2020★ 1.6k cited

GW190425: Observation of a Compact Binary Coalescence with Total Mass

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1199

On 2019 April 25, the LIGO Livingston detector observed a compact binary coalescence with signal-to-noise ratio 12.9. The Virgo detector was also taking data that did not contribut…