Results 51 to 60 of about 585 (184)
Ultrafast Variability in AGN Jets: Intermittency and Lighthouse Effect
The Astrophysical Journal Letters, 2023 Gamma-ray flares from active galactic nuclei (AGNs) show substantial variability on ultrafast timescales (i.e., shorter than the light-crossing time of the AGN’s supermassive black hole).
Emanuele Sobacchi +2 more
doaj +1 more source
The role of jets in the formation of planets, stars and galaxies [PDF]
, 2009 To appear in the proceedings for "Structure Formation in the Universe: Galaxies, Stars and Planets", ed. G.
Pudritz, Ralph E. +2 more
openaire +2 more sources
Jet–Accretion System in the Nearby mJy Radio Galaxies
The Astrophysical Journal, 2021 Abstract It is generally thought that FRII radio galaxies host thin optically thick disks, while FRIs are powered by advection-dominated accretion flows. Sources with an efficient engine are optically classified as high-excitation radio galaxies (HERGs) and those with an inefficient motor as low-excitation radio galaxies (LERGs ...
Paola Grandi +4 more
openaire +3 more sources
Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.ABSTRACT The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE).
Diego Calderón +4 more
wiley +1 more source
Spectral Structure in FR II Radio Galaxies and Jets [PDF]
The Astrophysical Journal, 2001 Using spectral tomography to separate overlapping spectral features in a sample of FRII radio galaxies, we find a variety of spatial/spectral features that are not easily described in the context of current models. In particular, we find mixtures of flat and steep spectrum features in the hot spot regions, and non-monotonic spectral index gradients ...
Treichel, K +3 more
openaire +3 more sources
Can the Symmetric Fermi and eROSITA Bubbles Be Produced by Tilted Jets?
The Astrophysical JournalThe Fermi Gamma-Ray Space Telescope reveals two large bubbles in the Galaxy, extending nearly symmetrically ∼50° above and below the Galactic center (GC).
Po-Hsun Tseng +4 more
doaj +1 more source
Survey on AI‐Enabled Computer Vision Technologies and Applications for Space Robotic Missions
Journal of Field Robotics, Volume 43, Issue 4, Page 2553-2584, June 2026.ABSTRACT This survey provides a comprehensive overview of recent advancements and challenges in Artificial Intelligence (AI)‐enabled computer vision (CV) techniques for space robotic missions, spanning critical phases such as Entry, Descent, and Landing (EDL), orbital operations, and planetary surface exploration.
Maciej Quoos +6 more
wiley +1 more source
Galaxies, 2021 The radiative and jet power in active galactic nuclei is generated by accretion of material on to supermassive galactic-centre black holes. For quasars, where the radiative power is by definition very high, objects with high radio luminosities form 10 ...
Gülay Gürkan +5 more
doaj +1 more source
Predicting Nitrogen Isotope Fractionation in Nitrate Deposition on Early Mars
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Noachian and early Hesperian Mars were likely warm and wet, with an atmosphere abundant in molecular nitrogen. The recent discovery of nitrate deposits in the Yellowknife Bay mudstones at Gale Crater confirm the existence of nitrogen oxides (NOX) on Noachian Mars. The processes responsible for the production of these nitrates would fractionate
J. Shawcross +4 more
wiley +1 more source
The Astrophysical JournalOur understanding of large-scale radio jets in merger systems has been drastically improved in the era of the Very Large Array, Very Long Baseline Array/European VLBI Network, upgraded Giant Metrewave Radio Telescope, and MeerKAT.
Santanu Mondal +5 more
doaj +1 more source