Results 111 to 120 of about 264,395 (306)
The Astrophysical Journal, 2023 The early evolution of the quasar luminosity function (QLF) and black hole mass function (BHMF) encodes key information on the physics determining the radiative and accretion processes of supermassive black holes (BHs) in high- z quasars.
Wenxiu Li +3 more
doaj +1 more source
Detection of Coronal Magnetic Activity in nearby Active Supermassive Black Holes [PDF]
Astrophysical Journal, 2018 Central supermassive black holes of active galactic nuclei host hot plasma with a temperature of 109 K, namely coronae. Like the Sun, black hole coronae are theoretically believed to be heated by their magnetic activity, which have not been observed yet.
Y. Inoue, A. Doi
semanticscholar +1 more source
A NEARLY NAKED SUPERMASSIVE BLACK HOLE [PDF]
The Astrophysical Journal, 2017 ABSTRACT During a systematic search for supermassive black holes (SMBHs) not in galactic nuclei, we identified the compact, symmetric radio source B3 1715+425 with an emission-line galaxy offset ≈ 8.5
James J. Condon +4 more
openaire +4 more sources
Primordial seeds of supermassive black holes
, 2012 Supermassive black holes exist in the centers of galaxies, including Milky Way, but there is no compelling theory of their formation. Furthermore, observations of quasars imply that supermassive black holes have already existed at some very high ...
Kawasaki, Masahiro +2 more
core +1 more source
Stochastic Quantum Mechanics in Curved Spaces: Application to Schwarzschild Black Holes
Astronomische Nachrichten, EarlyView.ABSTRACT In this work, we start from the hypothesis that the universe lives in a Gravitational Wave Background (GWB). From this hypothesis, it follows that space–time is not locally flat because we have to take into account the fluctuations of the GWB in space–time. This implies that sufficiently small particles will feel these oscillations, preventing
Juan S. Jerez‐Rodriguez +1 more
wiley +1 more source
The Astrophysical JournalAccretion supermassive black holes in the center of active galaxies usually produce “jet”-collimated bipolar outflows of relativistic particles. Magnetic fields near the black hole event horizon may play a crucial role in the formation of jets/outflows ...
Yongyun Chen +6 more
doaj +1 more source
Probing supermassive black hole mergers and stalling with pulsar timing arrays [PDF]
Nature Astronomy, volume 3, pages 8-10 (2019), 2019 The observation of gravitational-waves from merging supermassive black holes will be transformative: the detection of a low-frequency gravitational-wave background can tell us if and how supermassive black holes merge, inform our knowledge of galaxy merger rates and supermassive black hole masses, and enable the possibility of detecting new physics at ...
arxiv +1 more source
The GLEAMing of the first supermassive black holes
Publications of the Astronomical Society of Australia, 2020 AbstractWe present the results of a new selection technique to identify powerful ($L_{\rm 500\,MHz} \gt 10^{27}\,\text{WHz}^{-1}$) radio galaxies towards the end of the Epoch of Reionisation. Our method is based on the selection of bright radio sources showing radio spectral curvature at the lowest frequency (${\sim}100\,\text{MHz}$) combined with the ...
Guillaume Drouart +9 more
openaire +6 more sources
Starburst-AGN Connection: A Lesson from High-z Powerful Radio Galaxies
, 2004 Powerful radio galaxies at high redshift are highly useful in studies of early evolution of AGN-hosting galaxies because their observed optical and near infrared light are dominated by their stellar population rather than the nonthermal continuum emitted
Taniguchi, Yoshiaki
core +2 more sources
Interplay of Magnetic Reconnection and Current Sheet Kink Instability in the Earth's Magnetotail
Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.Abstract Magnetic reconnection and current sheet kink instability often develop concurrently in current sheets, yet their dynamic interplay remains unclear. We investigate their interaction in the magnetotail of a 3D global magnetospheric hybrid‐Vlasov simulation. We identify the instability growth and saturation phase and estimate the evolution of the
G. Cozzani +12 more
wiley +1 more source