Low-luminosity active galactic nuclei

Results 61 to 70 of about 6,292 (222)

EMU/GAMA: A Technique for Detecting Active Galactic Nuclei in Low Mass Systems [PDF]

We propose a new method for identifying active galactic nuclei (AGN) in low mass (M∗ ≤ 1010M☉) galaxies. This method relies on spectral energy distribution (SED) fitting to identify galaxies whose radio flux density has an excess over that expected from ...
Robotham, Aaron S.~G. +21 more
core +1 more source

Liquid Metal Nanotransformers for Drug‐Resistant Pan‐Cancer Therapy in Patient‐Derived Organoids

Advanced Science, Volume 13, Issue 36, 29 June 2026.
Pan‐cancer therapies are severely limited in drug‐resistance patients due to genetic mutations and other factors, resulting in poor therapeutic outcomes and constrained clinical benefit. Liquid metal nanotransformers, a new class of shape‐transformable nanomaterials capable of dramatic morphological changes, offer a promising physical strategy to ...
Xiaojie Yuan +19 more
wiley +1 more source

XRISM/Resolve Reveals the Complex Iron Structure of NGC 7213: Evidence for Radial Stratification between Inner Disk and Broad-line Region

The Astrophysical Journal Letters
We present the first high-resolution X-ray spectrum of NGC 7213 obtained with XRISM/Resolve, supported by simultaneous XMM-Newton, NuSTAR, and SOAR optical data.
E. Kammoun +51 more
doaj +1 more source

Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei

Astronomische Nachrichten, Volume 347, Issue 5, June 2026.
ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley +1 more source

Multiwavelength Constraints on the Local Black Hole Occupation Fraction

The Astrophysical Journal
The fraction of dwarf galaxies hosting central, intermediate-mass black holes (IMBHs) at low redshifts is an important observational probe of black hole seeding at high redshift.
Colin J. Burke +3 more
doaj +1 more source

Early evolutionary history of the seed

Biological Reviews, Volume 101, Issue 3, Page 1511-1553, June 2026.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton +2 more
wiley +1 more source

Constraints on radiatively inefficient accretion history from Eddington ratio distribution of active galactic nuclei

, 2007
The transition of a standard thin disc to a radiatively inefficient accretion flow (RIAF) is expected to occur when m similar to m(crit)(m =. M/M-Edd).
Xu, Ya-Di, Cao, Xinwu
core +1 more source

Probing the High-frequency Variability of NGC 5044: The Key to Active Galactic Nucleus Feedback

The Astrophysical Journal
The active galactic nucleus (AGN) feeding and feedback process in the centers of galaxy clusters and groups is still not well understood. NGC 5044 is the ideal system in which to study AGN feedback. It hosts the largest known reservoir of cold gas in any
Gerrit Schellenberger +12 more
doaj +1 more source

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

The 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

Mapping Quartz and Feldspar Areal Abundance and Grain Sizes Using Integrated VTIR Data

AGU Advances, Volume 7, Issue 3, June 2026.
Abstract Mineral dust is sourced from arid regions around the globe, and its composition impacts regional and global environments by affecting radiation balance, cloud formation, nutrient deposition, and snowmelt. As such, mineral dust plays a key role in Earth's energy and biogeochemical budgets.
Kathleen Grant +5 more
wiley +1 more source

active galactic nuclei
fos: physical sciences
supermassive black holes

astrophysics astro-ph
astrophysics
13. climate action

accretion
x-ray active galactic nuclei
radio active galactic nuclei