Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Leiden Observatory3.6k papers
- Centre National de la Recherche ScientifiqueFR2.4k papers
- Max Planck Institute for AstronomyDE1.4k papers
- European Southern ObservatoryCL1.4k papers
- Max Planck Institute for Extraterrestrial PhysicsDE1.3k papers
- California Institute of TechnologyUS1.1k papers
- University of GroningenNL1.1k papers
- Center for Astrophysics Harvard & SmithsonianUS1k papers
- Royal ObservatoryGB942 papers
- University of AmsterdamNL941 papers
- University College LondonGB886 papers
- University of CambridgeGB870 papers
40 papers · 2 filters
Probing the origin of diffuse radio emission in the cool-core of the Phoenix galaxy cluster
Ramij Raja, Majidul Rahaman, Abhirup Datta +7
Cool core galaxy clusters are considered to be dynamically relaxed clusters with regular morphology and highly X-ray luminous central region. However, cool core clusters can also b…
How do atomic code uncertainties affect abundance measurements in the intracluster medium?
F. Mernier, N. Werner, K. Lakhchaura +6
Accurate chemical abundance measurements of X-ray emitting atmospheres pervading massive galaxies, galaxy groups, and clusters provide essential information on the star formation a…
Low-frequency radio absorption in Tycho's supernova remnant
Maria Arias, Jacco Vink, Ping Zhou +3
Tycho's SNR is the remnant of the type Ia supernova explosion SN1572. In this work we present new low-frequency radio observations with the LOFAR Low-Band and High-Band Antennae, c…
Incoherent fast variability of X-ray obscurers. The case of NGC 3783
B. De Marco, T. P. Adhikari, G. Ponti +22
Context. Obscuration events caused by outflowing clumps or streams of high column density, low ionisation gas, heavily absorbing the X-ray continuum, have been witnessed in a numbe…
New mysteries and challenges from the Toothbrush relic: wideband observations from 550 MHz to 8 GHz
K. Rajpurohit, M. Hoeft, F. Vazza +10
Radio relics are diffuse extended synchrotron sources that originate from shock fronts induced by galaxy cluster mergers. The actual particle acceleration mechanism at the shock fr…
Merger rates in primordial black hole clusters without initial binaries
Valeriya Korol, Ilya Mandel, M. Coleman Miller +2
Primordial black holes formed through the collapse of cosmological density fluctuations have been hypothesised as contributors to the dark matter content of the Universe. At the sa…
The nature of the broadband X-ray variability in the dwarf Seyfert galaxy NGC 4395
E. S. Kammoun, E. Nardini, A. Zoghbi +14
We present a flux-resolved X-ray analysis of the dwarf Seyfert 1.8 galaxy NGC 4395, based on three archival and one archival observations. The source is known…
First M87 Event Horizon Telescope Results and the Role of ALMA
Ciriaco Goddi, Geoff Crew, Violette Impellizzeri +41
In April 2019, the Event Horizon Telescope (EHT) collaboration revealed the first image of the candidate super-massive black hole (SMBH) at the centre of the giant elliptical galax…
Chandra Observations of the Spectacular A3411-12 Merger Event
Felipe Andrade-Santos, Reinout J. van Weeren, Gabriella Di Gennaro +17
We present deep Chandra observations of A3411-12, a remarkable merging cluster that hosts the most compelling evidence for electron re-acceleration at cluster shocks to date. Using…
LOFAR early-time search for coherent radio emission from GRB 180706A
A. Rowlinson, K. Gourdji, K. van der Meulen +12
The nature of the central engines of gamma-ray bursts (GRBs) and the composition of their relativistic jets are still under debate. If the jets are Poynting flux dominated rather t…
Hot disk of the Swift J0243.6+6124 revealed by Insight-HXMT
V. Doroshenko, S. N. Zhang, A. Santangelo +113
We report on analysis of observations of the bright transient X-ray pulsar \src obtained during its 2017-2018 giant outburst with Insight-HXMT, \emph{NuSTAR}, and \textit{Swift} ob…
Discovery of a pulse-phase-transient cyclotron line in the X-ray pulsar GROJ2058+42
S. Molkov, A. Lutovinov, S. Tsygankov +2
We report the discovery of absorption features in the X-ray spectrum of the transient X-ray pulsar GROJ2058+42. The features are detected around , and keV…
Radio constraints on dark matter annihilation in Canes Venatici I with LOFAR
Martin Vollmann, Volker Heesen, Timothy Shimwell +4
Dwarf galaxies are dark matter-dominated and therefore promising targets for the search for weakly interacting massive particles (WIMPs), which are well-known candidates for dark m…
The connection between merging double compact objects and the Ultraluminous X-ray Sources
Samaresh Mondal, Krzysztof Belczyński, Grzegorz Wiktorowicz +2
We explore the different formation channels of merging double compact objects (DCOs: BH-BH/BH-NS/NS-NS) that went through a ultraluminous X-ray phase (ULX: X-ray sources with appar…
Gravitational Waves from Holographic Neutron Star Mergers
Christian Ecker, Matti Järvinen, Govert Nijs +1
We simulate the merger of binary neutron stars and analyze the spectral properties of their gravitational waveforms. For the stars we construct hybrid equations of state (EoSs) wit…
The impact of improved plasma diagnostics on modeling the X-ray Universe
Junjie Mao, Francois Mernier, Jelle S. Kaastra +3
The high-resolution X-ray spectrum of the Perseus galaxy cluster observed with the Hitomi satellite challenges astrophysical collisional ionized plasma models that are widely used…
Observations of a Pre-Merger Shock in Colliding Clusters of Galaxies
Liyi Gu, Hiroki Akamatsu, Timothy W. Shimwell +10
Clusters of galaxies are the largest known gravitationally-bound structures in the Universe. When clusters collide, they create merger shocks on cosmological scales, which transfor…
Shock acceleration efficiency in radio relics
A. Botteon, G. Brunetti, D. Ryu +1
Radio relics in galaxy clusters are giant diffuse synchrotron sources powered in cluster outskirts by merger shocks. Although the relic-shock connection has been consolidated in re…
Searching for fast extragalactic X-ray transients in Chandra surveys
Guang Yang, W. N. Brandt, S. F. Zhu +4
Recent works have discovered two fast ( ks) extragalactic X-ray transients in the Chandra Deep Field-South (CDF-S XT1 and XT2). These findings suggest that a large popu…
Cyclotron emission, absorption, and the two faces of X-ray pulsar A 0535+262
Sergey S. Tsygankov, Victor Doroshenko, Alexander A. Mushtukov +3
Deep NuSTAR observation of X-ray pulsar A 0535+262, performed at a very low luminosity of erg s, revealed the presence of two spectral components. We ar…
Electron-positron pairs in hot plasma of accretion column in bright X-ray pulsars
Alexander A. Mushtukov, Igor S. Ognev, Dmitrij I. Nagirner
The luminosity of X-ray pulsars powered by accretion onto magnetized neutron stars covers a wide range over a few orders of magnitude. The brightest X-ray pulsars recently discover…
X-ray spectra of the Fe-L complex
Liyi Gu, A. J. J. Raassen, Junjie Mao +7
The Hitomi results on the Perseus cluster lead to improvements in our knowledge of atomic physics which are crucial for the precise diagnostic of hot astrophysical plasma observed…
Evidence for the radiation-pressure dominated accretion disk in bursting pulsar GRO J1744-28 using timing analysis
Juhani Mönkkönen, Sergey S. Tsygankov, Alexander A. Mushtukov +3
The X-ray pulsar GRO J1744-28 is a unique source which shows both pulsations and type-II X-ray bursts, allowing studies of the interaction of the accretion disk with the magnetosph…
The LOFAR Tied-Array All-Sky Survey (LOTAAS): Survey overview and initial pulsar discoveries
S. Sanidas, S. Cooper, C. G. Bassa +20
We present an overview of the LOFAR Tied-Array All-Sky Survey (LOTAAS) for radio pulsars and fast transients. The survey uses the high-band antennas of the LOFAR Superterp, the den…