Results 101 to 110 of about 260,947 (301)

Observing supermassive black holes in virtual reality [PDF]

Computational Astrophysics and Cosmology, 2018
We present a 360∘ (i.e., 4π steradian) general-relativistic ray-tracing and radiative transfer calculations of accreting supermassive black holes. We perform state-of-the-art three-dimensional general-relativistic magnetohydrodynamical simulations using ...
J. Davelaar, T. Bronzwaer, Daniel Kok, Z. Younsi, M. Mościbrodzka, H. Falcke   +5 more
semanticscholar   +1 more source

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

Gravitational waves from binary supermassive black holes missing in pulsar observations [PDF]

Science, 2015
Placing bounds on gravitational wave detection Gravitational waves are expected to be generated by the interaction of the massive bodies in black-hole binary systems.
R. Shannon, Ravi, L. Lentati, P. Lasky, G. Hobbs, M. Kerr, R. Manchester, W. Coles, Y. Levin, M. Bailes, N. Bhat, S. Burke-Spolaor, Shi Dai, M. Keith, S. Osłowski, D. Reardon, W. V. Strateni, L. Toomey, J. Wang, L. Wen, J. Wyithe, Xiaoshuai Zhu   +21 more
semanticscholar   +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, Nick Seymour, Tim J. Galvin, Jose Afonso, Joseph R. Callingham, Carlos De Breuck, Melanie Johnston-Hollitt, Anna D. Kapińska, Matthew D. Lehnert, Joël Vernet   +9 more
openaire   +6 more sources

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, Yuri Y. Kovalev, Yuri Y. Kovalev, Leonid Petrov, Jeremy Darling   +4 more
openaire   +4 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, M. Alho, I. Zaitsev, H. Zhou, S. Hoilijoki, L. Turc, M. Grandin, K. Horaites, M. Battarbee, Y. Pfau‐Kempf, U. Ganse, K. Papadakis, M. Palmroth   +12 more
wiley   +1 more source

Observational Evidence for a Correlation between the Magnetic Field of Jets and Star Formation Rate in Host Galaxies

The Astrophysical Journal
Accretion 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, Qiusheng Gu, Junhui Fan, Xiaotong Guo, Xiaoling Yu, Nan Ding, Dingrong Xiong   +6 more
doaj   +1 more source

A Radio Census of Binary Supermassive Black Holes

, 2010
Using archival VLBI data for 3114 radio-luminous active galactic nuclei, we searched for binary supermassive black holes using a radio spectral index mapping technique which targets spatially resolved, double radio-emitting nuclei.
Beasley, Begelman, Boroson, Britzen, Colpi, Comerford, De Lucia, De Propris, Decarli, Detweiler, Dunlop, Enoki, Ferrarese, Fomalont, Frank, Giovannini, Gualandris, Haring, Jaffe, Jenet, Komossa, Komossa, Kovalev, Lacey, Lister, Lovell, Mason, Mauch, McLure, Merritt, Merritt, Myers, Owsianik, Padovani, Peterson, Petrov, Petrov, Petrov, Pollack, Rajagopal, Rodriguez, S. Burke-Spolaor, Saripalli, Sault, Sesana, Sesana, Slee, Springel, Sudou, Valtonen, Volonteri, Walker, Wang, Wen, Wilkinson, Wyithe, Yu   +56 more
core   +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

Detection of Supermassive Black Holes in Two Virgo Ultracompact Dwarf Galaxies [PDF]

, 2017
We present the detection of supermassive black holes (BHs) in two Virgo ultracompact dwarf galaxies (UCDs), VUCD3 and M59cO. We use adaptive optics assisted data from the Gemini/NIFS instrument to derive radial velocity dispersion profiles for both ...
Christopher P. Ahn, A. Seth, M. D. Brok, J. Strader, H. Baumgardt, R. V. D. van den Bosch, I. Chilingarian, M. Frank, M. Hilker, R. McDermid, S. Mieske, A. Romanowsky, L. Spitler, J. Brodie, N. Neumayer, J. Walsh   +15 more
semanticscholar   +1 more source