Results 61 to 70 of about 643 (219)

Investigating Model Dependencies for Obscured Active Galactic Nuclei: A Case Study of NGC 3982

open access: yesThe Astrophysical Journal
X-ray spectroscopy of heavily obscured active galactic nuclei (AGN) offers a unique opportunity to study the circumnuclear environment of accreting supermassive black holes.
Kristína Kallová   +2 more
doaj   +1 more source

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

open access: yesThe Astrophysical Journal Letters, 2021
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 observations revealed a compact asymmetric ring-like source morphology.
The Event Horizon Telescope Collaboration   +240 more
doaj   +1 more source

Mechanistic Understanding of Laser‐Induced Defect Engineering of Anisotropic Cobalt Oxide Spinel Platelets in Water

open access: yesChemCatChem, Volume 18, Issue 1, 15 January 2026.
Pulsed laser defect engineering in liquid (PUDEL) modifies anisotropic Co3O4 platelets by inducing lattice distortions and defects while enriching {111} surfaces with hydroxyl groups and tunes the catalytic activity of the Co3O4 platelets in electrocatalytic oxygen evolution and thermocatalytic selective oxidation reactions.
Dana Schellenburg   +22 more
wiley   +1 more source

Ghost in the Shell: Evidence for Past Active Galactic Nucleus Activities in NGC 5195 from a Newly Discovered Large-scale Ionized Structure

open access: yesThe Astrophysical Journal, 2023
The early-type galaxy NGC 5195 (alternatively known as M51b) possesses extended gas features detected in the multiwavelength, postulated to be associated with previous activities of the central supermassive black hole.
Xiaoyu Xu, Junfeng Wang
doaj   +1 more source

Subgrain and Cavity Development during Creep of Al‐3.85%Mg

open access: yesAdvanced Engineering Materials, Volume 27, Issue 23, December 2025.
Al‐3.85%Mg does form subgrains if crept at very high strains. This fact allows the unification of the creep description in two different alloys such as pure Al and Al–Mg alloys. It is classically considered that the creep mechanisms for type M (e.g., pure Al) and type A alloys (e.g., Al–Mg alloys) are different.
Augusta Isaac   +6 more
wiley   +1 more source

Revealing the Accretion Flow in M87*: Insights from Faraday Rotation

open access: yesThe Astrophysical Journal
The Faraday rotation measure (RM) is a commonly used tool to trace electron number density and magnetic fields in hot accretion flows, particularly in low-luminosity accreting supermassive black holes.
Constanza Echiburú-Trujillo   +1 more
doaj   +1 more source

Detection of a ∼0.1c Radio Knot in M81* Associated with a Moderate X-Ray Flare

open access: yesThe Astrophysical Journal, 2023
Through very long baseline interferometry observations of one of the closest low-luminosity active galactic nuclei, M81*, at multiple frequencies of 8.8, 22, and 44 GHz, a bright discrete knot with an unusual low apparent speed ∼0.1 c was detected ...
Xuezheng Wang   +6 more
doaj   +1 more source

Millikelvin Intracellular Nanothermometry with Nanodiamonds

open access: yesAdvanced Science, Volume 12, Issue 45, December 4, 2025.
Nanothermometry in living cells is crucial for understanding heat diffusion and advancing cellular biology and drug discovery. Previous studies have reported controversial intracellular temperature variations. Using nanodiamond nanothermometry in macrophages, it is found that, in such experimental setting, apparent temperature changes are actually due ...
Maabur Sow   +26 more
wiley   +1 more source

On the Subparsec-scale Core Composition of FR 0 Radio Galaxies

open access: yesThe Astrophysical Journal Letters, 2023
Although Fanaroff–Riley type 0 (FR 0) radio galaxies are known to be the most numerous jet population in the local Universe, they are much less explored than the well-established class of FR type I (FR I) and FR type II galaxies due to their intrinsic ...
Margot Boughelilba, Anita Reimer
doaj   +1 more source

A high-frequency radio survey of low-luminosity active galactic nuclei [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2005
15 pages, 5 figures.
Doi, A.   +4 more
openaire   +2 more sources

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