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Variability is a main property of active galactic nuclei (AGN) and it was adopted as a selection criterion using multi epoch surveys conducted for the detection of supernovae (SNe). We have used two SN datasets. First we selected the AXAF…

Astrophysics of Galaxies · Physics 2010-03-03 K. Boutsia , B. Leibundgut , D. Trevese , F. Vagnetti

Changing-look active galactic nuclei (CL-AGN) exhibit spectroscopic and photometric changes on timescales of months to years, making them powerful laboratories for studying accretion variability onto supermassive black holes. Motivated by…

Astrophysics of Galaxies · Physics 2026-03-20 Mariangella Camus , Swayamtrupta Panda

We assess the influence of different Eulerian geophysical input fields on Lagrangian drift simulations using DriftNet, a learning-based method designed to simulate Lagrangian drift on the sea surface. Two experiments are conducted: a fully…

Atmospheric and Oceanic Physics · Physics 2026-04-07 Daria Botvynko , Carlos Granero-Belinchon , Simon Van Gennip , Abdesslam Benzinou , Ronan Fablet

Telescopes to be launched over the next decade-and-a-half, such as JWST, EUCLID, ATHENA and Lynx, promise to revolutionise the study of the high redshift Universe and greatly advance our understanding of the early stages of galaxy…

We are using the Australia Telescope Compact Array to image about six square degrees surrounding the Chandra Deep Field South and European Large Area ISO Survey - South 1 regions, with the aim of producing the widest deep radio survey ever…

Astrophysics · Physics 2007-05-23 Ray P. Norris , Enno Middelberg , Brian J. Boyle

We present a description of the Dragonfly Wide Field Survey (DWFS), a deep photometric survey of a wide area of sky. The DWFS covers 330 $\mathrm{deg}^2$ in the equatorial GAMA fields and the Stripe 82 fields in the SDSS $g$ and $r$ bands.…

When dealing with deep neural network (DNN) applications on edge devices, continuously updating the model is important. Although updating a model with real incoming data is ideal, using all of them is not always feasible due to limits, such…

Machine Learning · Computer Science 2023-03-23 Yuya Senzaki , Christian Hamelain

Identifying active galactic nuclei (AGN) is extremely important for understanding galaxy evolution and its connection with the assembly of supermassive black holes (SMBH). With the advent of deep and high angular resolution imaging surveys…

Astrophysics of Galaxies · Physics 2026-02-18 Berta Margalef-Bentabol , Lingyu Wang , Antonio La Marca , Vicente Rodriguez-Gomez

Recent advances in observations have provided a wealth of measurements of the expansions of outflows in galactic discs out to large radii in a variety of galactic hosts. To provide an updated baseline for the interpretation of such data,…

Astrophysics of Galaxies · Physics 2019-04-17 N. Menci , F. Fiore , C. Feruglio , A. Lamastra , F. Shankar , E. Piconcelli , E. Giallongo , A. Grazian

The presence of absorbing gas around the central engine of Active Galactic Nuclei (AGN) is a common feature of these objects. Recent work has looked at the effect of the dust component of the gas, and how it enhances radiation pressure such…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 S. I. Raimundo , A. C. Fabian , F. E. Bauer , D. M. Alexander , W. N. Brandt , B. Luo , R. V. Vasudevan , Y. Q. Xue

A catalog of 8472 white dwarf (WD) candidates is presented, selected using reduced proper motions from the deep proper motion catalog of Munn et al. 2014. Candidates are selected in the magnitude range 16 < r < 21.5 over 980 square degrees,…

We study the properties of 56 massive (M$_{\rm{\star}}$ > 10$^{10}$ M$_{\odot}$) galaxies at $z<1$ that host AGN, detected via their broadband optical variability in the VST-COSMOS survey. VST-COSMOS provides a nearly-identical single visit…

Astrophysics of Galaxies · Physics 2026-02-18 B. Bichang'a , D. De Cicco , S. Kaviraj , I. Lazar , A. Watkins , G. Martin , D. Kakkad

We review the latest attempts to determine the accretion geometry in radio-loud active galactic nuclei (AGN). These objects, which comprise ~10-20% of the AGN population, produce powerful collimated radio jets that can extend thousands of…

Astrophysics · Physics 2008-11-26 D. R. Ballantyne

We introduce a novel machine learning dataset tailored for the classification of bent radio active galactic nuclei (AGN) in astronomical observations. Bent radio AGN, distinguished by their curved jet structures, provide critical insights…

Active visual SLAM finds a wide array of applications in GNSS-Denied sub-terrain environments and outdoor environments for ground robots. To achieve robust localization and mapping accuracy, it is imperative to incorporate the perception…

Robotics · Computer Science 2024-01-18 Suchetan Saravanan , Corentin Chauffaut , Caroline Chanel , Damien Vivet

Active galactic nuclei (AGNs) in the high-redshift Universe are thought to reside in overdense environments. However, recent works provide controversial results partly due to the use of different techniques and possible suppression of…

Astrophysics of Galaxies · Physics 2017-06-21 Satoshi Kikuta , Masatoshi Imanishi , Yoshiki Matsuoka , Yuichi Matsuda , Kazuhiro Shimasaku , Fumiaki Nakata

To establish the connection between galaxies and UV-detected absorption systems in the local universe, a deep ($g\leq20$) and wide ($\sim20^{\prime}$ radius) galaxy redshift survey is presented around 47 sight lines to UV-bright AGN…

Galaxy-scale strong gravitational lensing is not only a valuable probe of the dark matter distribution of massive galaxies, but can also provide valuable cosmological constraints, either by studying the population of strong lenses or by…

Instrumentation and Methods for Astrophysics · Physics 2017-12-06 Francois Lanusse , Quanbin Ma , Nan Li , Thomas E. Collett , Chun-Liang Li , Siamak Ravanbakhsh , Rachel Mandelbaum , Barnabas Poczos

Accurate distances to celestial objects are key to establishing the age and energy density of the Universe and the nature of dark energy. A distance measure using active galactic nuclei (AGN) has been sought for more than forty years, as…

Cosmology and Nongalactic Astrophysics · Physics 2011-10-05 D. Watson , K. D. Denney , M. Vestergaard , T. M. Davis

We investigate the differences in the stellar population properties, the structure, and the environment between massive compact star-forming galaxies (cSFGs) with or without active galactic nucleus (AGN) at $2<z<3$ in the five…

Astrophysics of Galaxies · Physics 2022-08-10 Shiying Lu , Yizhou Gu , Guanwen Fang , Qirong Yuan , Min Bao , Xiaotong Guo
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