Results 81 to 90 of about 8,662 (194)

Science of active galactic nuclei with the GTC and CanariCam [PDF]

, 2008
CanariCam is the facility mid-infrared (MIR) instrument for the Gran Telescopio Canarias (GTC), a 10.4m telescope at the Observatorio del Roque de los Muchachos on La Palma. One of the science drivers for CanariCam is the study of active galactic nuclei (
ITZIAR ARETXAGA MENDEZ
core  

UNCOVER: A NIRSpec Census of Lensed Galaxies at z = 8.50–13.08 Probing a High-AGN Fraction and Ionized Bubbles in the Shadow

The Astrophysical Journal
We present JWST NIRSpec prism spectroscopy of lensed galaxies at z ≳ 9 found behind the massive galaxy cluster Abell 2744 in the UNCOVER Cycle 1 Treasury Program.
Seiji Fujimoto, Bingjie Wang, John R. Weaver, Vasily Kokorev, Hakim Atek, Rachel Bezanson, Ivo Labbe, Gabriel Brammer, Jenny E. Greene, Iryna Chemerynska, Pratika Dayal, Anna de Graaff, Lukas J. Furtak, Pascal A. Oesch, David J. Setton, Sedona H. Price, Tim B. Miller, Christina C. Williams, Katherine E. Whitaker, Adi Zitrin, Sam E. Cutler, Joel Leja, Richard Pan, Dan Coe, Pieter van Dokkum, Robert Feldmann, Yoshinobu Fudamoto, Andy D. Goulding, Gourav Khullar, Danilo Marchesini, Michael Maseda, Themiya Nanayakkara, Erica J. Nelson, Renske Smit, Mauro Stefanon, Andrea Weibel   +35 more
doaj   +1 more source

The Effects of Carbonate Precipitation on the Physical Properties of Basalt

AGU Advances, Volume 7, Issue 2, April 2026.
Abstract To avoid the negative consequences of climate change, there is an urgent need to remove carbon dioxide from the atmosphere. Carbon mineralization—the conversion of injected CO2 into stable carbonate minerals—offers a promising pathway for large‐scale, permanent geologic storage. While projects such as CarbFix have demonstrated its feasibility,
Jonathan Simpson, Matěj Peč, Hoagy O’Ghaffari, Sharath Chandra Mahavadi, Jean E. Elkhoury   +4 more
wiley   +1 more source

Do All the Quasars and High-excitation Radio Galaxies (HERGs) in the 3CRR Catalog Contain a Magnetically Arrested Disk (MAD)?

The Astrophysical Journal
Based on the magnetization, an accretion disk with a large-scale magnetic field can be separated into either standard and normal evolution or magnetically arrested disk (MAD), which are difficult to identify from observations. It is still unclear whether
Shuang-Liang Li, Wenwen Zuo, Xinwu Cao
doaj   +1 more source

Monitoring the Extragalactic High Energy Sky

Galaxies, 2019
Blazars are jetted active galactic nuclei with a jet pointing close to the line of sight, hence enhancing their intrinsic luminosity and variability. Monitoring these sources is essential in order to catch them flaring and promptly organize follow-up ...
Jean-Philippe Lenain
doaj   +1 more source

Relation between radio core length and black hole mass for active galactic nuclei [PDF]

, 2002
We explore the relation between the linear length of radio core and the central black hole mass for a sample of radio-loud active galactic nuclei (AGNs). An empirical relation between the size of the broad line region (BLR) and optical luminosity is used
Jiang, DR, Cao, XW
core  

The 'harder when brighter' X-ray behaviour of the low-luminosity active galactic nucleus NGC 7213 [PDF]

, 2012
We present the first robust evidence of an anticorrelation between the X-ray photon index, Γ, and the X-ray luminosity in a single low-luminosity active galactic nucleus (LLAGN), NGC 7213.
Uttley, P., Arévalo, P., Papadakis, I.E., Calvelo, D.E., Emmanoulopoulos, D., McHardy, I.M.   +5 more
core   +1 more source

Quenching Black Hole Accretion by Active Galactic Nuclei Feedback [PDF]

, 2019
Observations of many dim galactic nuclei in the local universe give good estimations of gas density and temperature at the Bondi radius. If we assume the black hole accretes at the Bondi accretion rate and radiates at the efficiency of a low-luminosity ...
Yang, Xiao-Hong, Bu, De-Fu
core   +1 more source

Scattering of Stellar Mass Black Holes and Gravitational-wave Bremsstrahlung Radiation in Active Galactic Nucleus Disks

The Astrophysical Journal
The dynamics of stellar mass black holes (sBHs) embedded in active galactic nuclei (AGNs) could produce highly eccentric orbits near the central supermassive black hole, leading to repeated close encounters that emit gravitational waves in the Laser ...
Peter Lott, Christian Faulhaber, Joshua Brandt, Gongjie Li, Hareesh Bhaskar, Laura Cadonati   +5 more
doaj   +1 more source

Active galactic nuclei dust tori at low and high luminosities [PDF]

Monthly Notices of the Royal Astronomical Society, 2007
S. F. Hönig, T. Beckert
openaire   +1 more source