Showing 321 - 340 results of 373 for search '"active galactic nucleus"', query time: 0.11s Refine Results
  1. 321
  2. 322

    THE RISE OF AN IONIZED WIND IN THE NARROW-LINE SEYFERT 1 GALAXY Mrk 335 OBSERVED BY by Longinotti, Anna Lia, Krongold, Y., Kriss, Gerard A., Ely, J., Gallo, Luigi C., Grupe, D., Komossa, S., Mathur, Savita, Pradhan, A.

    Published 2015
    “…In the Cosmic Origins Spectrograph (COS) spectra obtained a few months after the X-ray observations, we found broad absorption in C IV lines intrinsic to the active galactic nucleus and blueshifted by a velocity roughly comparable to the X-ray outflow. …”
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    Article
  3. 323
  4. 324

    Revisiting a Core–Jet Laboratory at High Redshift: Analysis of the Radio Jet in the Quasar PKS 2215+020 at <i>z</i> = 3.572 by Sándor Frey, Judit Fogasy, Krisztina Perger, Kateryna Kulish, Petra Benke, Dávid Koller, Krisztina Éva Gabányi

    Published 2024-02-01
    “…While the presence of an X-ray jet could not be confirmed later, this active galactic nucleus is still unique at high redshift with its long VLBI jet. …”
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    Article
  5. 325

    FAST Discovery of a Fast Neutral Hydrogen Outflow by Renzhi Su, Minfeng Gu, S. J. Curran, Elizabeth K. Mahony, Ningyu Tang, James R. Allison, Di Li, Ming Zhu, J. N. H. S. Aditya, Hyein Yoon, Zheng Zheng, Zhongzu Wu

    Published 2023-01-01
    “…In this letter, we report the discovery of a fast neutral hydrogen outflow in SDSS J145239.38+062738.0, a merging radio galaxy containing an optical type I active galactic nucleus (AGN). This discovery was made through observations conducted by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) using redshifted 21 cm absorption. …”
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    Article
  6. 326

    Absorption of Millimeter-band CO and CN in the Early Universe: Molecular Clouds in the Radio Galaxy B2 0902+34 at Redshift 3.4 by Bjorn H. C. Emonts, Steve J. Curran, George K. Miley, Matthew D. Lehnert, Chris L. Carilli, Ilsang Yoon, Raffaella Morganti, Reinout J. van Weeren, Montserrat Villar-Martín, Pierre Guillard, Cristina M. Cordun, Tom A. Oosteroo

    Published 2024-01-01
    “…We discuss the scenario that the absorption components originate from collections of small and dense molecular clouds that are embedded in a region with more diffuse gas and high turbulence, possibly within the influence of the central active galactic nucleus or a starburst region. The degree of reddening in B2 0902+34, with rest-frame color B − K ∼ 4.2, is lower than the very red colors ( B − K > 6) found among other known redshifted CO absorption systems at z < 1. …”
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    Article
  7. 327

    A Candidate for the Least-massive Black Hole in the First 1.1 Billion Years of the Universe by Masafusa Onoue, Kohei Inayoshi, Xuheng Ding, Wenxiu Li, Zhengrong Li, Juan Molina, Akio K. Inoue, Linhua Jiang, Luis C. Ho

    Published 2023-01-01
    “…We report a candidate of a low-luminosity active galactic nucleus (AGN) at z = 5 that was selected from the first near-infrared images of the JWST CEERS project. …”
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    Article
  8. 328

    Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448 by Megan Masterson, Michael McDonald, Behzad Ansarinejad, Matthew Bayliss, Bradford A. Benson, Lindsey E. Bleem, Michael S. Calzadilla, Alastair C. Edge, Benjamin Floyd, Keunho J. Kim, Gourav Khullar, Taweewat Somboonpanyakul

    Published 2023-01-01
    “…The high-redshift cluster shows clear signs of being relaxed with well-regulated feedback from the active galactic nucleus (AGN) in the brightest cluster galaxy (BCG). …”
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    Article
  9. 329

    Galaxy Quenching at the High Redshift Frontier: A Fundamental Test of Cosmological Models in the Early Universe with JWST-CEERS by Asa F. L. Bluck, Christopher J. Conselice, Katherine Ormerod, Joanna M. Piotrowska, Nathan Adams, Duncan Austin, Joseph Caruana, K. J. Duncan, Leonardo Ferreira, Paul Goubert, Thomas Harvey, James Trussler, Roberto Maiolino

    Published 2024-01-01
    “…This connection is explained in cosmological models via massive black holes forming and growing in deep potential wells, and subsequently quenching galaxies through a mix of ejective and preventative active galactic nucleus feedback.…”
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  10. 330

    Probing the Heart of Active Narrow-line Seyfert 1 Galaxies with VERA Wideband Polarimetry by Mieko Takamura, Kazuhiro Hada, Mareki Honma, Tomoaki Oyama, Aya Yamauchi, Syunsaku Suzuki, Yoshiaki Hagiwara, Monica Orienti, Filippo D’Ammando, Jongho Park, Minchul Kam, Akihiro Doi

    Published 2023-01-01
    “…Our results are in accordance with the scenario that NLSy1s are in an early stage of active galactic nucleus evolution with their central black hole masses being smaller than those of more evolved FSRQs.…”
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  11. 331

    Pure Spectroscopic Constraints on UV Luminosity Functions and Cosmic Star Formation History from 25 Galaxies at z spec = 8.61–13.20 Confirmed with JWST/NIRSpec by Yuichi Harikane, Kimihiko Nakajima, Masami Ouchi, Hiroya Umeda, Yuki Isobe, Yoshiaki Ono, Yi Xu, Yechi Zhang

    Published 2023-01-01
    “…Our results indicate possibilities of high star formation efficiency (>5%), a hidden active galactic nucleus, a top-heavy initial mass function (possibly with Population III), and large scatter/variance. …”
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    Article
  12. 332

    Powerful Yet Lonely: Is 3C 297 a High-redshift Fossil Group? by Valentina Missaglia, Juan P. Madrid, Mischa Schirmer, Francesco Massaro, Alberto Rodríguez-Ardila, Carlos J. Donzelli, Martell Valencia, Alessandro Paggi, Ralph P. Kraft, Chiara Stuardi, Belinda J. Wilkes

    Published 2022-01-01
    “…In addition, a radio map obtained with the Very Large Array shows a bright hotspot in the northwestern direction, created by the interaction of the active galactic nucleus (AGN) jet arising from 3C 297 with its environment. …”
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    Article
  13. 333

    Hard X-Ray to Radio Multiwavelength SED Analysis of Local U/LIRGs in the GOALS Sample with a Self-consistent AGN Model including a Polar-dust Component by Satoshi Yamada, Yoshihiro Ueda, Martín Herrera-Endoqui, Yoshiki Toba, Takamitsu Miyaji, Shoji Ogawa, Ryosuke Uematsu, Atsushi Tanimoto, Masatoshi Imanishi, Claudio Ricci

    Published 2023-01-01
    “…Adopting the torus parameters obtained by the X-ray fitting, we estimate the properties of the host galaxies, active galactic nucleus (AGN) tori, and polar dust. The star formation rates (SFRs) become larger with merger stage and most of them are above the main sequence. …”
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    Article
  14. 334
  15. 335

    The Way of Water: ALMA Resolves H2O Emission Lines in a Strongly Lensed Dusty Star-forming Galaxy at z ∼ 3.1 by Francesca Perrotta, Marika Giulietti, Marcella Massardi, Giovanni Gandolfi, Tommaso Ronconi, Maria Vittoria Zanchettin, Quirino D’ Amato, Meriem Behiri, Martina Torsello, Francesco Gabrielli, Lumen Boco, Vincenzo Galluzzi, Andrea Lapi

    Published 2023-01-01
    “…We discuss the possibility of J1135 hosting an active galactic nucleus in its accretion phase. Finally, we determine the relation between the water emission lines and the total IR luminosity of J1135, as well as the star formation rate as a function of water emission intensities, comparing the outcomes to local and high- z galactic samples from the literature.…”
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  16. 336

    THE STATE OF THE WARM AND COLD GAS IN THE EXTREME STARBURST AT THE CORE OF THE PHOENIX GALAXY CLUSTER (SPT-CLJ2344-4243) by McDonald, Michael A., Swinbank, Mark, Edge, Alastair C., Wilner, David J., Veilleux, Sylvain, Benson, Bradford A., Hogan, Michael T., Marrone, Daniel P., McNamara, Brian R., Wei, Lisa H., Bayliss, Matthew B., Bautz, Marshall W.

    Published 2015
    “…In both the center of the galaxy and in a newly discovered highly ionized plume to the north of the galaxy, the ionization ratios are consistent with both shocks and active galactic nucleus (AGN) photoionization. We speculate that this extended plume may be a galactic wind, driven and partially photoionized by both the starburst and central AGN. …”
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  17. 337

    The CAMELS Project: Expanding the Galaxy Formation Model Space with New ASTRID and 28-parameter TNG and SIMBA Suites by Yueying Ni, Shy Genel, Daniel Anglés-Alcázar, Francisco Villaescusa-Navarro, Yongseok Jo, Simeon Bird, Tiziana Di Matteo, Rupert Croft, Nianyi Chen, Natalí S. M. de Santi, Matthew Gebhardt, Helen Shao, Shivam Pandey, Lars Hernquist, Romeel Dave

    Published 2023-01-01
    “…CAMELS-ASTRID employs the galaxy formation model following the ASTRID simulation and contains 2124 hydrodynamic simulation runs that vary three cosmological parameters (Ω _m , σ _8 , Ω _b ) and four parameters controlling stellar and active galactic nucleus (AGN) feedback. Compared to the existing TNG and SIMBA simulation suites in CAMELS, the fiducial model of ASTRID features the mildest AGN feedback and predicts the least baryonic effect on the matter power spectrum. …”
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    Article
  18. 338

    Multiple Shock Fronts in RBS 797: The Chandra Window on Shock Heating in Galaxy Clusters by F. Ubertosi, M. Gitti, F. Brighenti, M. McDonald, P. Nulsen, M. Donahue, G. Brunetti, S. Randall, M. Gaspari, S. Ettori, M. Calzadilla, A. Ignesti, L. Feretti, E. L. Blanton

    Published 2023-01-01
    “…The total energy associated with the shocks is ∼6 × 10 ^61 erg, with the central active galactic nucleus (AGN) driving a pair of weak shocks every 20–30 Myr with a power P _sh ≈ 10 ^46 erg s ^−1 . …”
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    Article
  19. 339

    A New Population of Mid-infrared-selected Tidal Disruption Events: Implications for Tidal Disruption Event Rates and Host Galaxy Properties by Megan Masterson, Kishalay De, Christos Panagiotou, Erin Kara, Iair Arcavi, Anna-Christina Eilers, Danielle Frostig, Suvi Gezari, Iuliia Grotova, Zhu Liu, Adam Malyali, Aaron M. Meisner, Andrea Merloni, Megan Newsome, Arne Rau, Robert A. Simcoe, Sjoert van Velzen

    Published 2024-01-01
    “…These candidates were selected based on the following IR light-curve properties: (1) L _W2 ≳ 10 ^42 erg s ^−1 at peak; (2) fast rise, followed by a slow, monotonic decline; (3) no significant prior variability; and (4) no evidence for active galactic nucleus (AGN) activity in Wide-field Infrared Survey Explorer (WISE) colors. …”
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  20. 340

    NuSTAR Observations of a Heavily X-Ray-obscured AGN in the Dwarf Galaxy J144013+024744 by Shrey Ansh, Chien-Ting J. Chen, W. N. Brandt, Carol E. Hood, E. S. Kammoun, G. Lansbury, Stéphane Paltani, Amy E. Reines, C. Ricci, Douglas A. Swartz, Jonathan R. Trump, F. Vito, Ryan C. Hickox

    Published 2023-01-01
    “…We present a multiwavelength analysis of the dwarf Seyfert 2 galaxy J144013+024744, a candidate obscured active galactic nucleus (AGN) thought to be powered by an intermediate-mass black hole (IMBH, M _• ≈ 10 ^4 −10 ^6 M _⊙ ) of mass M _• ∼ 10 ^5.2 M _⊙ . …”
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