Hadronic origin of multi-TeV gamma rays and neutrinos from low-luminosity active galactic nuclei: Implications of past activities of the Galactic center [PDF]
, 2015 Radiatively inefficient accretion flows (RIAFs) in low-luminosity active galactic nuclei (LLAGNs) have been suggested as cosmic-ray and neutrino sources that may largely contribute to the observed diffuse neutrino intensity.
Y. Fujita, S. Kimura, K. Murase
semanticscholar +1 more source
Evidence of a Forming Nucleus in the Fourcade–Figueroa Galaxy
The Astrophysical JournalWe analyze data from the IRAS, Wide-field Infrared Survey Explorer, and Planck satellites, revealing an unresolved dust condensation at the center of the Fourcade–Figueroa galaxy (ESO270-G017), which may correspond to a forming nucleus.
H. Dottori, R. J. Díaz
doaj +1 more source
The Astrophysical Journal, 2023 The variability of submillimeter emission provides a useful tool to probe the accretion physics in low-luminosity active galactic nuclei. We accumulate four years of observations using the Submillimeter Array for Centaurus A, NGC 4374, NGC 4278, and NGC ...
Bo-Yan Chen +7 more
doaj +1 more source
Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei
Astronomische Nachrichten, EarlyView.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
Investigating Model Dependencies for Obscured Active Galactic Nuclei: A Case Study of NGC 3982
The Astrophysical JournalX-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
Cytoskeleton, EarlyView.ABSTRACT Cells sense the stiffness of their extracellular matrix (ECM) and adapt their behavior accordingly. We investigated how ECM stiffness affects the spatial organization of talin1, a key mechanosensitive focal adhesion protein. Using polyacrylamide (PA) hydrogels with tunable stiffnesses (0.2–188 kPa), we analyzed cell morphology, migration ...
Joanna Hajduk +5 more
wiley +1 more source
ON THE DISAPPEARANCE OF THE BROAD-LINE REGION IN LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI [PDF]
, 2009 The disk-wind scenario for the broad-line region (BLR) and toroidal obscuration in active galactic nuclei (AGNs) predicts the disappearance of the BLR at low luminosities.
M. Elitzur, L. Ho
semanticscholar +1 more source
Triggering Active Galactic Nuclei in Hierarchical Galaxy Formation: Disk instability vs. Interactions [PDF]
, 2014 Using a semi analytic model for galaxy formation we investigate the effects of Black Hole accretion triggered by disk instabilities (DI) in isolated galaxies on the evolution of AGN. Specifically, we took on, developed and expanded the Hopkins & Quataert
Fiore, F. +3 more
core +1 more source
X-Ray Variability as a Probe of Advection-dominated Accretion in Low-Luminosity Active Galactic Nuclei [PDF]
, 1998 As a class, LINERs and low-luminosity active galactic nuclei (LLAGNs) tend to show little or no significant short-term variability (i.e., with timescales less than a day).
A. Ptak +5 more
semanticscholar +1 more source
Anhydrous minerals in asteroid Bennu: Evidence for well‐preserved primordial components
Meteoritics &Planetary Science, EarlyView.Abstract Aqueously altered carbonaceous astromaterials are dominated by secondary minerals, but a minor fraction of primary, anhydrous silicates and oxides escape alteration, offering insight into the original composition of asteroid parent bodies. We report the mineralogy, petrology, mineral chemistry, and oxygen isotopes of anhydrous minerals—50 ...
S. S. Russell +23 more
wiley +1 more source