output
19932026
most citedThe Gaia mission

7.1k citations

Showing 2018 · astro-ph.HEShow all

34 papers · 2 filters

astro-ph.HE2018★ 9 cited

Relativistic X-ray jets at high redshift

Daniel A Schwartz, Aneta Siemiginowska, Diana M Worrall +6

Powerful radio sources and quasars emit relativistic jets of plasma and magnetic fields that travel hundreds of kilo-parsecs, ultimately depositing energy into the intra- or inter-…

astro-ph.HE2018★ 9 cited

Simulations of the merging cluster of galaxies Cygnus A

Timo Halbesma, Julius Donnert, Martijn de Vries +1

The archetype FR-II galaxy Cygnus A lies in a moderately rich cluster about to undergo a major merger. We study the pre-merger Cygnus cluster environment using smoothed particle hy…

astro-ph.HE2018★ 72 cited

Observatory science with eXTP

Jean J. M. in 't Zand, Enrico Bozzo, Jinlu Qu +181

In this White Paper we present the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies related to Observatory Science targets. These include flaring s…

astro-ph.HE2018★ 46 cited

Accretion in Strong Field Gravity with eXTP

Alessandra De Rosa, Phil Uttley, Lijun Gou +99

In this paper we describe the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies related to accretion flows in the strong field gravity regime around…

astro-ph.HE2018★ 36 cited

The Impact of the Environment on the Early Stages of Radio Source Evolution

Malgosia Sobolewska, Aneta Siemiginowska, Matteo Guainazzi +4

Compact Symmetric Objects (CSOs) show radio features such as jets, lobes, hot spots that are contained within the central 1 kpc region of their host galaxy. Thus, they are thought…

astro-ph.HE2018★ 173 cited

A -ray determination of the Universe's star-formation history

LAT Collaboration, M. Ajello, K. Helgason +4

The light emitted by all galaxies over the history of the Universe produces the extragalactic background light (EBL) at ultraviolet, optical, and infrared wavelengths. The EBL is a…

astro-ph.HE2018★ 37 cited

Unresolved Gamma-Ray Sky through its Angular Power Spectrum

M. Ackermann, M. Ajello, L. Baldini +107

The gamma-ray sky has been observed with unprecedented accuracy in the last decade by the Fermi large area telescope (LAT), allowing us to resolve and understand the high-energy Un…

astro-ph.HE2018★ 56 cited

Radio observations of the merging galaxy cluster Abell 520

D. N. Hoang, T. W. Shimwell, R. J. van Weeren +13

We examine the possible acceleration mechanisms of the relativistic particles responsible for the extended radio emission in Abell 520. We used new LOFAR 145 MHz, archival GMRT 323…

astro-ph.HE2018★ 22 cited

Characterizing the radio emission from the binary galaxy cluster merger Abell 2146

D. N. Hoang, T. W. Shimwell, R. J. van Weeren +8

Collisions of galaxy clusters generate shocks and turbulence in the intra-cluster medium (ICM). The presence of relativistic particles and magnetic fields is inferred through the d…

astro-ph.HE2018★ 18 cited

Blazars in the LOFAR Two-Metre Sky Survey First Data Release

S. Mooney, J. Quinn, J. R. Callingham +13

Historically, the blazar population has been poorly understood at low frequencies because survey sensitivity and angular resolution limitations have made it difficult to identify m…

astro-ph.HE2018★ 68 cited

The intergalactic magnetic field probed by a giant radio galaxy

S. P. O'Sullivan, J. Machalski, C. L. Van Eck +27

Cosmological simulations predict that an intergalactic magnetic field (IGMF) pervades the large scale structure (LSS) of the Universe. Measuring the IGMF is important to determine…

astro-ph.HE2018★ 8 cited

AGILE, Fermi, Swift, and GASP-WEBT multi-wavelength observations of the high-redshift blazar 4C 71.07 in outburst

S. Vercellone, P. Romano, G. Piano +56

The flat-spectrum radio quasar 4C 71.07 is a high-redshift (), -loud blazar whose optical emission is dominated by the thermal radiation from accretion disc. 4C 7…

astro-ph.HE2018★ 148 cited

A long-lived neutron star merger remnant in GW170817: constraints and clues from X-ray observations

L. Piro, E. Troja, B. Zhang +12

Multi-messenger observations of GW170817 have not conclusively established whether the merger remnant is a black hole (BH) or a neutron star (NS). We show that a long-lived magneti…

astro-ph.HE2018★ 25 cited

The luminosity--volume test for cosmological Fast Radio Bursts

Nicola Locatelli, Michele Ronchi, Giancarlo Ghirlanda +1

We perform the luminosity--volume test, also known as , to Fast Radio Bursts (FRBs). We compare the 23 FRBs, recently discovered by ASKAP, with 20 of the…

astro-ph.HE2018★ 267 cited

An embedded X-ray source shines through the aspherical AT2018cow: revealing the inner workings of the most luminous fast-evolving optical transients

Raffaella Margutti, B. D. Metzger, R. Chornock +41

We present the first extensive radio to gamma-ray observations of a fast-rising blue optical transient (FBOT), AT2018cow, over its first ~100 days. AT2018cow rose over a few days t…

astro-ph.HE2018★ 166 cited

Parabolic Jets from the Spinning Black Hole in M87

Masanori Nakamura, Keiichi Asada, Kazuhiro Hada +18

The M87 jet is extensively examined by utilizing general relativistic magnetohydrodynamic (GRMHD) simulations as well as the steady axisymmetric force-free electrodynamic (FFE) sol…

astro-ph.HE2018★ 10 cited

Faint -ray sources at low-redshift: the radio galaxy IC 1531

T. Bassi, G. Migliori, P. Grandi +6

We present a multi-wavelength study of IC 1531 (z=0.02564), an extragalactic radio source associated with the -ray object 3FGL J0009.9-3206 and classified as a blazar of uncerta…

astro-ph.HE2018★ 10 cited

Stormy weather in 3C 196.1: nuclear outbursts and merger events shape the environment of the hybrid radio galaxy 3C 196.1

F. Ricci, L. Lovisari, R. P. Kraft +8

We present a multi-wavelength analysis based on archival radio, optical and X-ray data of the complex radio source 3C 196.1, whose host is the brightest cluster galaxy of a $z=0.19…

astro-ph.HE2018★ 39 cited

VERITAS and Fermi-LAT observations of new HAWC sources

VERITAS Collaboration, A. U. Abeysekara, A. Archer +280

The HAWC (High Altitude Water Cherenkov) collaboration recently published their 2HWC catalog, listing 39 very high energy (VHE; >100~GeV) gamma-ray sources based on 507 days of obs…

astro-ph.HE2018★ 28 cited

Evidence of jet-clump interaction: a flip of the radio jet head of 3C~84

M. Kino, K. Wajima, N. Kawakatu +6

Radio jets in active galaxies have been expected to interact with circumnuclear environments in their early phase evolutions. By performing the multi-epoch monitoring observation w…

astro-ph.HE2018★ 395 cited

Compact radio emission indicates a structured jet was produced by a binary neutron star merger

G. Ghirlanda, O. S. Salafia, Z. Paragi +33

The binary neutron star merger event GW170817 was detected through both electromagnetic radiation and gravitational waves. Its afterglow emission may have been produced by either a…

astro-ph.HE2018★ 33 cited

The 3CR Chandra snapshot survey: extragalactic radio sources with 0.51.0

F. Massaro, V. Missaglia, C. Stuardi +10

This paper presents the analysis of Chandra X-ray snapshot observations of a subsample of the extragalactic sources listed in the revised Third Cambridge radio catalog (3CR), previ…

astro-ph.HE2018★ 8 cited

The 3CR extragalactic survey at 1.01.5

C. Stuardi, V. Missaglia, F. Massaro +11

The aim of this paper is to present an analysis of newly acquired X-ray observations of 16 extragalactic radio sources, listed in the Third Cambridge Revised (3CR) catalog, and not…

astro-ph.HE2018★ 75 cited

Collimation, Acceleration and Recollimation Shock in the Jet of Gamma-Ray-emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy 1H 0323+342

Kazuhiro Hada, Akihiro Doi, Kiyoaki Wajima +6

We investigated the detailed radio structure of the jet of 1H 0323+342 using high-resolution multi-frequency Very Long Baseline Array observations. This source is known as the near…