output
19962026
most citedPlanck 2013 results. XVI. Cosmological parameters

6.6k citations

Showing 2021 · astro-ph.HEShow all

26 papers · 2 filters

astro-ph.HE2021★ 27 cited

The intrinsic structure of Sagittarius A* at 1.3 cm and 7 mm

Ilje Cho, Guang-Yao Zhao, Tomohisa Kawashima +63

Sagittarius A* (Sgr A*), the Galactic Center supermassive black hole (SMBH), is one of the best targets to resolve the innermost region of SMBH with very long baseline interferomet…

astro-ph.HE2021★ 36 cited

Collimation of the relativistic jet in the quasar 3C 273

Hiroki Okino, Kazunori Akiyama, Keiichi Asada +32

The collimation of relativistic jets launched from the vicinity of supermassive black holes (SMBHs) at the centers of active galactic nuclei (AGN) is one of the key questions to un…

astro-ph.HE2021★ 14 cited

Forbidden Line Emission from Type Ia Supernova Remnants Containing Balmer-Dominated Shells

Chuan-Jui Li, You-Hua Chu, John C. Raymond +3

Balmer-dominated shells in supernova remnants (SNRs) are produced by collisionless shocks advancing into a partially neutral medium, and are most frequently associated with Type Ia…

astro-ph.HE2021★ 18 cited

The Variability of the Black-Hole Image in M87 at the Dynamical Time Scale

Kaushik Satapathy, Dimitrios Psaltis, Feryal Ozel +235

The black-hole images obtained with the Event Horizon Telescope (EHT) are expected to be variable at the dynamical timescale near their horizons. For the black hole at the center o…

astro-ph.HE2021★ 5 cited

Measuring lens dimensionality in extreme scattering events through wave optics

Dylan L. Jow, Ue-Li Pen

Compact radio sources have been observed to undergo large, frequency dependent changes in intensity due to lensing by structures in the interstellar medium, in so-called "extreme s…

astro-ph.HE2021★ 28 cited

Investigating the Nature of the Luminous Ambiguous Nuclear Transient ASASSN-17jz

Thomas W. -S. Holoien, Jack M. M. Neustadt, Patrick J. Vallely +31

We present observations of the extremely luminous but ambiguous nuclear transient (ANT) ASASSN-17jz, spanning roughly 1200 days of the object's evolution. ASASSN-17jz was discovere…

astro-ph.HE2021★ 25 cited

Burst properties of the highly active FRB 20201124A using uGMRT

V. R. Marthi, S. Bethapudi, R. A. Main +7

We report the observations of the highly active FRb20201124A with the upgraded Giant Metrewave Radio Telescope at 550-750~MHz. These observations in the incoherent array mode simul…

astro-ph.HE2021

A revised view of the linear polarization in the subparsec core of M87 at 7 mm

Jongho Park, Keiichi Asada, Masanori Nakamura +5

The linear polarization images of the jet in the giant elliptical galaxy M87 have previously been observed with Very Long Baseline Array at 7 mm. They exhibit a complex polarizatio…

astro-ph.HE2021★ 88 cited

Sub-second periodicity in a fast radio burst

FRB Collaboration, Bridget C. Andersen, Kevin Bandura +59

Fast radio bursts (FRBs) are millisecond-duration flashes of radio waves that are visible at distances of billions of light-years. The nature of their progenitors and their emissio…

astro-ph.HE2021★ 13 cited

The eROSITA Final Equatorial-Depth Survey (eFEDS): The first archetypal Quasar in the feedback phase discovered by eROSITA

M. Brusa, T. Urrutia, Y. Toba +18

Theoretical models of galaxy-AGN co-evolution ascribe an important role for the feedback process to a short, luminous, obscured, and dust-enshrouded phase during which the accretio…

astro-ph.HE2021★ 99 cited

The eROSITA Final Equatorial-Depth Survey (eFEDS): The AGN Catalogue and its X-ray Spectral Properties

Teng Liu, Johannes Buchner, Kirpal Nandra +23

Context: After the successful launch of the Spectrum-Roentgen-Gamma (SRG) mission in July 2019, eROSITA, the soft X-ray instrument aboard SRG, performed scanning observations of a…

astro-ph.HE2021★ 122 cited

The eROSITA Final Equatorial-Depth Survey (eFEDS): Identification and characterization of the counterparts to the point-like sources

M. Salvato, J. Wolf, T. Dwelly +41

In November 2019, eROSITA on board of SRG observatory started to map the entire sky in X-rays. After the 4-year survey program, it will reach flux limits about 25 times deeper than…

astro-ph.HE2021★ 15 cited

Profile changes associated with DM events in PSR J1713+0747

Fang Xi Lin, Hsiu-Hsien Lin, Jing Luo +5

Propagation effects in the interstellar medium and intrinsic profile changes can cause variability in the timing of pulsars, which limits the accuracy of fundamental science done v…

astro-ph.HE2021★ 89 cited

The Polarized Image of a Synchrotron Emitting Ring of Gas Orbiting a Black Hole

Ramesh Narayan, Daniel C. M. Palumbo, Michael D. Johnson +237

Synchrotron radiation from hot gas near a black hole results in a polarized image. The image polarization is determined by effects including the orientation of the magnetic field i…

astro-ph.HE2021★ 13 cited

Interferometric Monitoring of Gamma-ray Bright AGNs: Measuring the Magnetic Field Strength of 4C +29.45

S. Kang, S. -S. Lee, J. Hodgson +7

We present the results of multi-epoch, multi-frequency monitoring of a blazar 4C +29.45, which was regularly monitored as part of the Interferometric Monitoring of GAmma-ray Bright…

astro-ph.HE2021★ 683 cited

First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon

The Event Horizon Telescope Collaboration

Event Horizon Telescope (EHT) observations at 230 GHz have now imaged polarized emission around the supermassive black hole in M87 on event-horizon scales. This polarized synchrotr…

astro-ph.HE2021★ 469 cited

First M87 Event Horizon Telescope Results. VII. Polarization of the Ring

The Event Horizon Telescope Collaboration

In 2017 April, the Event Horizon Telescope (EHT) observed the near-horizon region around the supermassive black hole at the core of the M87 galaxy. These 1.3 mm wavelength observat…

astro-ph.HE2021★ 301 cited

A repeating fast radio burst source in a globular cluster

F. Kirsten, B. Marcote, K. Nimmo +63

Fast radio bursts (FRBs) are exceptionally luminous flashes of unknown physical origin, reaching us from other galaxies (Petroff et al. 2019). Most FRBs have only ever been seen on…

astro-ph.HE2021★ 12 cited

Search for gamma rays from SNe with a variable-size sliding-time-window analysis of the Fermi-LAT data

Dmitry Prokhorov, Anthony Moraghan, Jacco Vink

We present a systematic search for gamma-ray emission from supernovae (SNe) in the Fermi Large Area Telescope (LAT) Pass 8 data. The sample of targets consists of 55,880 candidates…

astro-ph.HE2021★ 4 cited

A search for signatures of interactions of X-ray binary outflows with their environments with ALMA

M. Díaz Trigo, D. Petry, E. Humphreys +2

We observed the X-ray binaries CirX-1, ScoX-1, GRS 1915+105, GX13+1, and CygX-1 with the Atacama Large Millimeter/submillimeter Array (ALMA). Unresolved continuum emission is found…

astro-ph.HE2021★ 18 cited

A detailed kinematic study of 3C 84 and its connection to Gamma-rays

Jeffrey A. Hodgson, Bindu Rani, Junghwan Oh +7

3C 84 (NGC 1275) is the bright radio core of the Perseus Cluster. Even in the absence of strong relativistic effects, the source has been detected at Gamma-rays up to TeV energies.…

astro-ph.HE2021★ 17 cited

Discovery of Double-Ring Structure in the Supernova Remnant N103B: Evidence for Bipolar Winds from a Type Ia Supernova Progenitor

Hiroya Yamaguchi, Fabio Acero, Chuan-Jui Li +1

The geometric structure of supernova remnants (SNR) provides a clue to unveiling the pre-explosion evolution of their progenitors. Here we present an X-ray study of N103B (0509-68.…

astro-ph.HE2021★ 11 cited

Physics of Superluminous Supernovae

Ke-Jung Chen

Understanding how massive stars die as supernovae is a crucial question in modern astrophysics. Supernovae are powerful stellar explosions and key drivers in the cosmic baryonic cy…

astro-ph.HE2021★ 10 cited

SALT observations of the supernova remnant MCSNR J0127-7332 and its associated Be X-ray binary SXP 1062 in the SMC

V. V. Gvaramadze, A. Y. Kniazev, J. S. Gallagher +4

We report the results of optical spectroscopy of the Small Magellanic Cloud supernova remnant (SNR) MCSNR J0127-7332 and the mass donor Be star, 2dFS 3831, in its associated high-m…