Results 131 to 140 of about 50,755 (263)

The optical/near-infrared broad-line emission and hard X-ray continuum of active galactic nuclei and ultraluminous infrared galaxies [PDF]

, 1999
Masatoshi Imanishi, Shiro Ueno
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XRISM Spectroscopy of Accretion-driven Wind Feedback in NGC 4151

The Astrophysical Journal Letters
The hottest, most ionized, and fastest winds driven by accretion onto massive black holes have the potential to reshape their host galaxies. Calorimeter-resolution X-ray spectroscopy is the ideal tool to understand this feedback mode, as it enables ...
Xin Xiang, Jon M. Miller, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Margaret Buhariwalla, Doyee Byun, Chris Done, Luigi Gallo, Dimitra Gerolymatou, Scott Hagen, Jelle Kaastra, Stephane Paltani, Frederick S. Porter, Richard Mushotzky, Hirofumi Noda, Missagh Mehdipour, Takeo Minezaki, Makoto Tashiro, Abderahmen Zoghbi   +19 more
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Redshifted Iron Emission and Absorption Lines in the Chandra X-Ray Spectrum of Centaurus A

The Astrophysical Journal
Cen A hosts the closest active galactic nucleus to the Milky Way, which makes it an ideal target for investigating the dynamical processes in the vicinity of accreting supermassive black holes.
David Bogensberger, Jon Miller, Elias Kammoun, Richard Mushotzky, Laura Brenneman, W. N. Brandt, Edward M. Cackett, Andrew Fabian, Jelle Kaastra, Shashank Dattathri, Ehud Behar, Abderahmen Zoghbi   +11 more
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THENuSTAREXTRAGALACTIC SURVEY: FIRST DIRECT MEASUREMENTS OF THE ≳10 keV X-RAY LUMINOSITY FUNCTION FOR ACTIVE GALACTIC NUCLEI ATz> 0.1 [PDF]

, 2015
J. Aird, D. M. Alexander, D. R. Ballantyne, F. Civano, A. Del-Moro, R. C. Hickox, G. B. Lansbury, J. R. Mullaney, F. E. Bauer, W. N. Brandt, A. Comastri, A. C. Fabian, P. Gandhi, F. A. Harrison, B. Luo, D. Stern, E. Treister, L. Zappacosta, M. Ajello, R. Assef, M. Baloković, S. E. Boggs, M. Brightman, F. E. Christensen, W. W. Craig, M. Elvis, K. Forster, B. W. Grefenstette, C. J. Hailey, M. Koss, S. M. LaMassa, K. K. Madsen, S. Puccetti, C. Saez, C. M. Urry, D. R. Wik, W. Zhang   +36 more
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The SOUX AGN sample: SDSS–XMM-Newton optical, ultraviolet, and X-ray selected active galactic nuclei spanning a wide range of parameter space – sample definition [PDF]

, 2023
Daniel Kynoch, Jake A. J. Mitchell, M. J. Ward, Chris Done, Elisabeta Lusso, Hermine Landt   +5 more
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Revealing an Oscillating and Contracting Compact Corona near the Event Horizon of the Supermassive Black Hole in 1ES 1927+654

The Astrophysical Journal Letters
Dynamic processes in the accretion flow near black holes produce X-ray flux variability, sometimes quasiperiodic. Determining its physical origin is key to mapping the accretion geometry but remains unresolved.
Qing-Cang Shui, Shu Zhang, Shuang-Nan Zhang, Hua Feng, Yu-Peng Chen, Long Ji, Ling-Da Kong, Liang Zhang, Jing-Qiang Peng, Peng-Ju Wang   +9 more
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A strategy to measure the dark energy equation of state using the H ii galaxy Hubble function and X-ray active galactic nuclei clustering: preliminary results [PDF]

, 2011
M. Plionis, R. Terlevich, Spyros Basilakos, Fabio Bresolin, E. Terlevich, J. Melnick, Ricardo Chávez   +6 more
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First Observational Evidence for an Interconnected Evolution between Time Lag and QPO Frequency among AGNs

The Astrophysical Journal Letters
Quasiperiodic oscillations (QPOs) have been widely observed in black hole X-ray binaries (BHBs), which often exhibit significant X-ray variations. Extensive research has explored the long-term evolution of the properties of QPOs in BHBs.
Ruisong Xia, Hao Liu, Yongquan Xue
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On the occupation of X-ray-selected galaxy groups by radio active galactic nuclei since z = 1.3 [PDF]

, 2011
V. Smolčić, A. Finoguenov, G. Zamorani, E. Schinnerer, M. Tanaka, S. Giodini, N. Scoville   +6 more
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Nature of Compton-thick Active Galactic Nuclei in “Nonmerging” Luminous Infrared Galaxies UGC 2608 and NGC 5135 Revealed with Broadband X-Ray Spectroscopy [PDF]

, 2020
Satoshi Yamada, Yoshihiro Ueda, Atsushi Tanimoto, Saeko Oda, Masatoshi Imanishi, Yoshiki Toba, Claudio Ricci   +6 more
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