Showing 341 - 360 results of 373 for search '"active galactic nucleus"', query time: 0.11s Refine Results
  1. 341

    Robust Field-level Likelihood-free Inference with Galaxies by Natalí S. M. de Santi, Helen Shao, Francisco Villaescusa-Navarro, L. Raul Abramo, Romain Teyssier, Pablo Villanueva-Domingo, Yueying Ni, Daniel Anglés-Alcázar, Shy Genel, Elena Hernández-Martínez, Ulrich P. Steinwandel, Christopher C. Lovell, Klaus Dolag, Tiago Castro, Mark Vogelsberger

    Published 2023-01-01
    “…More importantly, by testing the models on galaxy catalogs from thousands of hydrodynamic simulations, each having a different efficiency of supernova and active galactic nucleus feedback, run with five different codes and subgrid models—IllustrisTNG, SIMBA, Astrid, Magneticum, SWIFT-EAGLE—we find that our models are robust to changes in astrophysics, subgrid physics, and subhalo/galaxy finder. …”
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  2. 342

    SPT-CL J2215−3537: A Massive Starburst at the Center of the Most Distant Relaxed Galaxy Cluster by Michael S. Calzadilla, Lindsey E. Bleem, Michael McDonald, Michael D. Gladders, Adam B. Mantz, Steven W. Allen, Matthew B. Bayliss, Anna-Christina Eilers, Benjamin Floyd, Julie Hlavacek-Larrondo, Gourav Khullar, Keunho J. Kim, Guillaume Mahler, Keren Sharon, Taweewat Somboonpanyakul, Brian Stalder, Antony A. Stark, SPT collaboration

    Published 2023-01-01
    “…The detection of a weak radio source (2.0 ± 0.8 mJy at 0.8 GHz) suggests ongoing feedback from an active galactic nucleus (AGN), though the implied jet power is less than half the cooling luminosity of the hot gas, consistent with cooling overpowering heating. …”
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  3. 343

    Shock Excitation in Narrow-line Regions Powered by AGN Outflows by Misaki Mizumoto, Hiroaki Sameshima, Naoto Kobayashi, Noriyuki Matsunaga, Sohei Kondo, Satoshi Hamano, Chikako Yasui, Kei Fukue, Akira Arai, Hideyo Kawakita, Shogo Otsubo, Giuseppe Bono, Ivo Saviane

    Published 2023-01-01
    “…Outflows in an active galactic nucleus (AGN) are considered to play a key role in the evolution of the host galaxy through transfer of a large amount of energy. …”
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  4. 344

    Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XVIII. The Dark Matter Halo Mass of Quasars at z ∼ 6 by Junya Arita, Nobunari Kashikawa, Yoshiki Matsuoka, Wanqiu He, Kei Ito, Yongming Liang, Rikako Ishimoto, Takehiro Yoshioka, Yoshihiro Takeda, Kazushi Iwasawa, Masafusa Onoue, Yoshiki Toba, Masatoshi Imanishi

    Published 2023-01-01
    “…Our results supporting a significant increasing bias with redshift are consistent with the bias evolution model with inefficient active galactic nucleus feedback at z ∼ 6. The duty cycle ( f _duty ) is estimated as 0.019 ± 0.008 by assuming that DMHs in some mass interval can host a quasar. …”
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  5. 345

    Identification and Characterization of a Large Sample of Distant Active Dwarf Galaxies in XMM-SERVS by Fan Zou, W. N. Brandt, Qingling Ni, Shifu Zhu, David M. Alexander, Franz E. Bauer, Chien-Ting J. Chen, Bin Luo, Mouyuan Sun, Cristian Vignali, Fabio Vito, Yongquan Xue, Wei Yan

    Published 2023-01-01
    “…Our sources are generally less obscured than predictions based on the massive-AGN (active galactic nucleus) X-ray luminosity function and have a low radio-excess fraction. …”
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  6. 346
  7. 347
  8. 348

    An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Physical Properties of z = 2–5 Ultra- and Hyperluminous Infrared Galax... by Cheng-Lin Liao, Chian-Chou Chen, Wei-Hao Wang, Ian Smail, Y. Ao, S. C. Chapman, U. Dudzevičiūtė, M. Frias Castillo, Minju M. Lee, Stephen Serjeant, A. M. Swinbank, Dominic J. Taylor, Hideki Umehata, Y. Zhao

    Published 2024-01-01
    “…We also find that AS2COSPEC SMGs have one of the highest dust-to-stellar mass ratios, with a median of 0.02 ± 0.01, significantly higher than model predictions, possibly due to too-strong active galactic nucleus feedback implemented in the model. …”
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  9. 349

    JWST Identification of Extremely Low C/N Galaxies with [N/O] ≳ 0.5 at z ∼ 6–10 Evidencing the Early CNO-cycle Enrichment and a Connection with Globular Cluster Formation by Yuki Isobe, Masami Ouchi, Nozomu Tominaga, Kuria Watanabe, Kimihiko Nakajima, Hiroya Umeda, Hidenobu Yajima, Yuichi Harikane, Hajime Fukushima, Yi Xu, Yoshiaki Ono, Yechi Zhang

    Published 2023-01-01
    “…Among the 70 galaxies, we have pinpointed two galaxies, CEERS_01019 at z = 8.68 and GLASS_150008 at z = 6.23, with extremely low C/N ([C/N] ≲ −1), evidenced with C iii ] λλ 1907,1909, N iii ] λ 1750, and N iv ] λλ 1483,1486, which show high N/O ratios ([N/O] ≳ 0.5) comparable with the one of GN-z11, regardless of whether stellar or active galactic nucleus radiation is assumed. Such low C/N and high N/O ratios found in CEERS_01019 and GLASS_150008 (additionally identified in GN-z11) are largely biased toward the equilibrium of the CNO cycle, suggesting that these three galaxies are enriched by metals processed by the CNO cycle. …”
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  10. 350

    Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. XIII. Ultraviolet Time Lag of Hβ Emission in Mrk 142 by Viraja C. Khatu, Sarah C. Gallagher, Keith Horne, Edward M. Cackett, Chen Hu, Sofia Pasquini, Patrick Hall, Jian-Min Wang, Wei-Hao Bian, Yan-Rong Li, Jin-Ming Bai, Yong-Jie Chen, Pu Du, Michael Goad, Bo-Wei Jiang, Sha-Sha Li, Yu-Yang Songsheng, Chan Wang, Ming Xiao, Zhe Yu

    Published 2023-01-01
    “…We performed a rigorous reverberation-mapping analysis of the broad-line region (BLR) in a highly accreting ( L / L _Edd = 0.74–3.4) active galactic nucleus, Markarian 142 (Mrk 142), for the first time using concurrent observations of the inner accretion disk and the BLR to determine a time lag for the H β λ 4861 emission relative to the ultraviolet (UV) continuum variations. …”
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  11. 351

    Resolved CO(1–0) Emission and Gas Properties in Luminous Dusty Star-forming Galaxies at z = 2–4 by F. Stanley, B. M. Jones, D. A. Riechers, C. Yang, S. Berta, P. Cox, T. J. L. C. Bakx, A. Cooray, H. Dannerbauer, S. Dye, D. H. Hughes, R. J. Ivison, S. Jin, M. Lehnert, R. Neri, A. Omont, P. van der Werf, A. Weiss

    Published 2023-01-01
    “…Lastly, four sources are detected in the continuum, three have radio emission consistent with their infrared-derived star formation rates, while HerBS-70E requires an additional synchrotron radiation component from an active galactic nucleus. Overall, we find that even though the sample is similarly luminous in the infrared, by tracing the CO(1−0) emission a diversity of galaxy and excitation properties are revealed, demonstrating the importance of CO(1−0) observations in combination to higher- J transitions.…”
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  12. 352

    Early Results from GLASS-JWST. XVI. Discovering a Bluer z ∼ 4–7 Universe through UV Slopes by Themiya Nanayakkara, Karl Glazebrook, Colin Jacobs, Andrea Bonchi, Marco Castellano, Adriano Fontana, Charlotte Mason, Emiliano Merlin, Takahiro Morishita, Diego Paris, Michele Trenti, Tommaso Treu, Antonello Calabrò, Kristan Boyett, Marusa Bradac, Nicha Leethochawalit, Danilo Marchesini, Paola Santini, Victoria Strait, Eros Vanzella, Benedetta Vulcani, Xin Wang, Lilian Yang

    Published 2023-01-01
    “…Therefore, it is likely that stellar population models with a higher amount of Lyman continuum leakage, active galactic nucleus effects, and/or Population III contributions are required to accurately reproduce the rest-UV and optical properties of some of our bluest galaxies. …”
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  13. 353
  14. 354

    Redshift Evolution of the Feedback–Cooling Equilibrium in the Core of 48 SPT Galaxy Clusters: A Joint Chandra–SPT–ATCA Analysis by F. Ruppin, M. McDonald, J. Hlavacek-Larrondo, M. Bayliss, L. E. Bleem, M. Calzadilla, A. C. Edge, M. D. Filipović, B. Floyd, G. Garmire, G. Khullar, K. J. Kim, R. Kraft, G. Mahler, R. P. Norris, A. O’Brien, C. L. Reichardt, T. Somboonpanyakul, A. A. Stark, N. Tothill

    Published 2023-01-01
    “…Assuming that the scaling relation between the radio power and active galactic nucleus (AGN) cavity power P _cav observed at low redshift does not evolve with redshift, we use these measurements in order to estimate the expected AGN cavity power in the core of each system. …”
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  15. 355
  16. 356
  17. 357

    JWST's TEMPLATES for Star Formation: The First Resolved Gas-phase Metallicity Maps of Dust-obscured Star-forming Galaxies at z ∼ 4 by Jack E. Birkin, Taylor A. Hutchison, Brian Welch, Justin S. Spilker, Manuel Aravena, Matthew B. Bayliss, Jared Cathey, Scott C. Chapman, Anthony H. Gonzalez, Gayathri Gururajan, Christopher C. Hayward, Gourav Khullar, Keunho J. Kim, Guillaume Mahler, Matthew A. Malkan, Desika Narayanan, Grace M. Olivier, Kedar A. Phadke, Cassie Reuter, Jane R. Rigby, J. D. T. Smith, Manuel Solimano, Nikolaus Sulzenauer, Joaquin D. Vieira, David Vizgan, Axel Weiss

    Published 2023-01-01
    “…While one source shows elevated [N  ii ]/H α ratios and broad H α emission consistent with the presence of an active galactic nucleus in a ≳1 kpc region, we argue that both systems have already undergone significant metal enrichment as a result of their extremely high star formation rates. …”
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  18. 358

    RC100: Rotation Curves of 100 Massive Star-forming Galaxies at z = 0.6–2.5 Reveal Little Dark Matter on Galactic Scales by A. Nestor Shachar, S. H. Price, N. M. Förster Schreiber, R. Genzel, T. T. Shimizu, L. J. Tacconi, H. Übler, A. Burkert, R. I. Davies, A. Dekel, R. Herrera-Camus, L. L. Lee, D. Liu, D. Lutz, T. Naab, R. Neri, A. Renzini, R. Saglia, K. F. Schuster, A. Sternberg, E. Wisnioski, S. Wuyts

    Published 2023-01-01
    “…A combination of stellar or active galactic nucleus feedback, and/or heating due to dynamical friction, may drive the DM from cuspy into cored mass distributions, pointing to an efficient buildup of massive bulges and central black holes at z ∼ 2 SFGs.…”
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  19. 359

    GOALS-JWST: Pulling Back the Curtain on the AGN and Star Formation in VV 114 by J. Rich, S. Aalto, A. S. Evans, V. Charmandaris, G. C. Privon, T. Lai, H. Inami, S. Linden, L. Armus, T. Diaz-Santos, P. Appleton, L. Barcos-Muñoz, T. Böker, K. L. Larson, D. R. Law, M. A. Malkan, A. M. Medling, Y. Song, V. U, P. van der Werf, T. Bohn, M. J. I. Brown, L. Finnerty, C. Hayward, J. Howell, K. Iwasawa, F. Kemper, J. Marshall, J. M. Mazzarella, J. McKinney, F. Muller-Sanchez, E. J. Murphy, D. Sanders, B. T. Soifer, S. Stierwalt, J. Surace

    Published 2023-01-01
    “…Our observations show for the first time spectroscopic evidence that the SW core hosts an active galactic nucleus as evidenced by its very low 6.2 μ m and 3.3 μ m polycyclic aromatic hydrocarbon equivalent widths (0.12 and 0.017 μ m, respectively) and mid- and near-IR colors. …”
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  20. 360

    Extremely Red Galaxies at z = 5–9 with MIRI and NIRSpec: Dusty Galaxies or Obscured Active Galactic Nuclei? by Guillermo Barro, Pablo G. Pérez-González, Dale D. Kocevski, Elizabeth J. McGrath, Jonathan R. Trump, Raymond C. Simons, Rachel S. Somerville, L. Y. Aaron Yung, Pablo Arrabal Haro, Hollis B. Akins, Michaela B. Bagley, Nikko J. Cleri, Luca Costantin, Kelcey Davis, Mark Dickinson, Steve L. Finkelstein, Mauro Giavalisco, Carlos Gómez-Guijarro, Nimish P. Hathi, Michaela Hirschmann, Benne W. Holwerda, Marc Huertas-Company, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Ray A. Lucas, Casey Papovich, Nor Pirzkal, Lise-Marie Seillé, Sandro Tacchella, Stijn Wuyts, Stephen M. Wilkins, Alexander de la Vega, Guang Yang, Jorge A. Zavala

    Published 2024-01-01
    “…We analyze the SEDs of eight of them with MIRI and NIRSpec observations using stellar population models and active galactic nucleus (AGN) templates. We find that dusty galaxies or obscured AGNs provide similarly good SED fits but different stellar properties: massive and dusty, $\mathrm{log}{M}_{\star }/{M}_{\odot }$ ∼ 10 and A _V ≳ 3 mag, or low mass and obscured, $\mathrm{log}{M}_{\star }/{M}_{\odot }$ ∼ 7.5 and A _V ∼ 0 mag, hosting an obscured quasi-stellar object (QSO). …”
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