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Observations of emission lines in Active Galactic Nuclei (AGN) often find fast (~1000 km s^-1) outflows extending to kiloparsec scales, seen in ionised, neutral atomic and molecular gas. In this work we present radiative transfer…

星系天体物理 · 物理学 2021-03-10 Alexander J. Richings , Claude-Andre Faucher-Giguere , Jonathan Stern

Galactic outflows are now commonly observed in starburst and active galactic nuclei (AGN) host galaxies. Yet, there is no clear consensus on their physical driving mechanism(s). We have previously shown that AGN radiative feedback, driven…

星系天体物理 · 物理学 2018-10-17 W. Ishibashi , A. C. Fabian

Active Galactic Nuclei (AGN) are sources of high-energy gamma-rays and are considered to be promising candidates to be sources of high-energy cosmic rays and neutrinos as well. We present and discuss various models for ion acceleration and…

高能天体物理现象 · 物理学 2023-11-13 Kohta Murase , Floyd W. Stecker

Jet feedback from active galactic nuclei (AGN) harboured by brightest cluster galaxies is expected to play a fundamental role in regulating cooling in the intracluster medium (ICM). While observations and theory suggest energy within jet…

星系天体物理 · 物理学 2019-10-17 Martin A. Bourne , Debora Sijacki , Ewald Puchwein

We consider simple semi-analytic models that relate the active galactic nuclei (AGN) evolution to the merging history of their host dark matter haloes and quantify their ability of matching the AGN luminosity function and its spatial…

天体物理学 · 物理学 2008-11-26 F. Marulli , E. Branchini , L. Moscardini , M. Volonteri

We present an analytical model for the evolution of extended active galactic nuclei (AGNs) throughout their full lifecycle, including the initial jet expansion, lobe formation, and eventual remnant phases. A particular focus of our…

高能天体物理现象 · 物理学 2022-10-26 Ross J. Turner , Patrick M. Yates-Jones , Stanislav S. Shabala , Benjamin Quici , Georgia S. C. Stewart

This paper introduces $\textit{arfpy}$, a python implementation of Adversarial Random Forests (ARF) (Watson et al., 2023), which is a lightweight procedure for synthesizing new data that resembles some given data. The software…

机器学习 · 统计学 2023-11-14 Kristin Blesch , Marvin N. Wright

Active galactic nuclei (AGN) are typically identified through radio, mid-infrared, or X-ray emission or through the presence of broad and/or narrow emission lines. AGN can also leave an imprint on a galaxy's spectral energy distribution…

X-ray spectroscopy offers an opportunity to study the complex mixture of emitting and absorbing components in the circumnuclear regions of active galactic nuclei, and to learn about the accretion process that fuels AGN and the feedback of…

高能天体物理现象 · 物理学 2009-11-13 T. J. Turner , L. Miller

Energetic feedback from active galactic nuclei (AGN) is an important ingredient for regulating the star-formation history of galaxies in models of galaxy formation, which makes it important to study how AGN feedback actually occurs in…

Outflows in active galactic nuclei (AGN) are considered a promising candidate for driving AGN feedback at large scales. However, without information on the density of these outflows, we cannot determine how much kinetic power they are…

高能天体物理现象 · 物理学 2023-02-01 Daniele Rogantini , Missagh Mehdipour , Jelle Kaastra , Elisa Costantini , Anna Juráňová , Erin Kara

We collect data at all frequencies for the new sources classified as unknown active galactic nuclei (AGNs) in the latest Burst Alert Telescope (BAT) all-sky hard X-ray catalog. Focusing on the 36 sources with measured redshift, we compute…

高能天体物理现象 · 物理学 2021-04-07 Luca Giuliani , Gabriele Ghisellini , Tullia Sbarrato

Low-metallicity active galactic nuclei (AGNs) are interesting to study the early phase of the AGN evolution. However most AGNs are chemically matured and accordingly low-metallicity AGNs are extremely rare. One approach to search for…

星系天体物理 · 物理学 2017-07-28 Kota Kawasaki , Tohru Nagao , Yoshiki Toba , Koki Terao , Kenta Matsuoka

Ionization cones and relativistic jets give us one of the most large-scale example of active galactic nuclei (AGN) influence on the surrounding gas environment in galaxies and beyond. The study of ionization cones makes it possible not only…

星系天体物理 · 物理学 2023-12-05 Alexei V. Moiseev , Aleksandrina A. Smirnova

A thorough study of radio emission in Active Galactic Nuclei (AGN) is of fundamental importance to understand the physical mechanisms responsible for the emission and the interplay between accretion and ejection processes. High frequency…

星系天体物理 · 物理学 2020-05-27 E. Chiaraluce , F. Panessa , G. Bruni , R. D. Baldi , E. Behar , F. Vagnetti , F. Tombesi , I. McHardy

Under the unified model for active galactic nuclei (AGNs), narrow-line (Type 2) AGNs are, in fact, broad-line (Type 1) AGNs but each with a heavily obscured accretion disk. We would therefore expect the optical continuum emission from Type…

ArchNEMESIS is an open-source Python package developed for the analysis of remote sensing spectroscopic observations of planetary atmospheres. It is based on the widely used NEMESIS radiative transfer and retrieval tool, which has been…

天体物理仪器与方法 · 物理学 2025-07-29 Juan Alday , Joseph Penn , Patrick G. J. Irwin , Jonathon P. Mason , Jingxuan Yang

Reionization marks one of the most important phase transitions in the history of the Universe, during which neutral baryonic matter was transformed into ionized plasma. While star-forming galaxies are widely regarded as the primary drivers…

星系天体物理 · 物理学 2026-01-12 Tong Su , Qi Guo , Wenxiang Pei , Linhua Jiang

It is suggested that the outflowing plasma in the jets of active galactic nuclei (AGNs) is inhomogeneous and consists of separate clouds. These clouds are strongly magnetized and move away from the central engine at relativistic speeds. The…

天体物理学 · 物理学 2010-12-03 V. V. Usov , M. V. Smolsky

Large-scale structure surveys measure the shapes and positions of millions of galaxies in order to constrain the cosmological model with high precision. The resulting large data volume poses a challenge for the analysis of the data, from…

宇宙学与河外天体物理 · 物理学 2025-10-28 Silvan Fischbacher , Beatrice Moser , Tomasz Kacprzak , Joerg Herbel , Luca Tortorelli , Uwe Schmitt , Alexandre Refregier , Adam Amara