Results 101 to 110 of about 1,281,453 (204)

The Masses of AGN Host Galaxies and the Origin of Radio Loudness

, 2006
We highlight some of the principal results from our recent Hubble Space Telescope studies of quasars and radio galaxies. The hosts of these powerful AGN are normal massive ellipticals which lie on the region of the fundamental plane populated predominantly by massive ellipticals with boxy isophotes and distinct cores.
Dunlop, James S., Mclure, Ross J.
openaire   +2 more sources

Discrepancies between JWST Observations and Simulations of Quenched Massive Galaxies at z > 3: A Comparative Study with IllustrisTNG and ASTRID

The Astrophysical Journal
Recent JWST observations have uncovered an unexpectedly large population of massive quiescent galaxies at z  > 3. Using the cosmological simulations IllustrisTNG and ASTRID , we identify analogous galaxies and investigate their abundance, formation ...
Emma Jane Weller, Fabio Pacucci, Yueying Ni, Lars Hernquist, Minjung Park   +4 more
doaj   +1 more source

PEARLS: Discovery of Point-source Features within Galaxies in the North Ecliptic Pole Time Domain Field

The Astrophysical Journal
The first public 0.9–4.4 μ m NIRCam images of the North Ecliptic Pole Time Domain Field uncovered galaxies displaying point-source features in their cores as seen in the longer-wavelength filters. We visually identified a sample of 66 galaxies (∼1 galaxy
Rafael Ortiz III, Rogier A. Windhorst, Seth H. Cohen, Steven P. Willner, Rolf A. Jansen, Timothy Carleton, Patrick S. Kamieneski, Michael J. Rutkowski, Brent M. Smith, Jake Summers, Cheng Cheng, Dan Coe, Christopher J. Conselice, Jose M. Diego, Simon P. Driver, Jordan C. J. D’Silva, Brenda L. Frye, Hansung B. Gim, Norman A. Grogin, Heidi B. Hammel, Nimish P. Hathi, Benne W. Holwerda, Minhee Hyun, Myungshin Im, William C. Keel, Anton M. Koekemoer, Juno Li, Madeline A. Marshall, Tyler J. McCabe, Noah J. McLeod, Stefanie N. Milam, Rosalia O’Brien, Nor Pirzkal, Aaron S. G. Robotham, Russell E. Ryan Jr., Christopher N. A. Willmer, Haojing Yan, Min S. Yun, Adi Zitrin   +38 more
doaj   +1 more source

SSDSS IV MaNGA - Properties of AGN host galaxies

, 2017
We present here the characterization of the main properties of a sample of 98 AGN host galaxies, both type-II and type-I, in comparison with those of about 2700 non-active galaxies observed by the MaNGA survey. We found that AGN hosts are morphologically early-type or early-spirals.
Sánchez, S., Avila-Reese, V., Hernandez-Toledo, H., Cortes-Súarez, E., Rodríguez-Puebla, A., Ibarra-Medel, H., Cano-Díaz, M., Barrera-Ballesteros, J., Negrete, C., Calette, A., de Lorenzo-Cáceres, A., Ortega-Minakata, R., Aquino, E., Valenzuela, O., Clemente, J., Storchi-Bergmann, T., Riffel, R., Schimoia, J., Riffel, R., Rembold, S., Brownstein, J., Pan, K., Yates, R., Mallmann, N., Bitsakis, T.   +24 more
openaire   +3 more sources

Common Excitation Patterns of Star Formation, Active Galactic Nuclei, and Shocks in Seyfert Galaxies

The Astrophysical Journal
The growth of galaxies and their central supermassive black holes is closely connected, yet the net effect of active galactic nucleus (AGN) feedback on host-galaxy star formation remains uncertain.
Peixin Zhu, Lisa J. Kewley, Dominika Ł. Król, Giuseppina Fabbiano, Lars Hernquist, Ralph S. Sutherland, Anna Trindade Falcão, Martin Elvis, Riccardo Middei   +8 more
doaj   +1 more source

Prevalence of galaxy-galaxy interactions in AGN hosts [PDF]

Proceedings of the International Astronomical Union, 2004
Jeremy Lim, Cheng-Yu Kuo, Ya-Wen Tang, Jenny Greene, Paul T. P. Ho   +4 more
openaire   +1 more source

Deep Chandra Observations of NGC 5728. III. Probing the High-resolution X-Ray Morphology and Multiphase Interstellar Medium Interactions in the Circumnuclear Region

The Astrophysical Journal
We present a detailed imaging analysis of 260 ks of subarcsecond resolution Chandra (ACIS-S) observations of the nearby Seyfert 2 galaxy NGC 5728. Our study focuses on the bright and diffuse soft X-ray emission within the galaxy's inner ∼1 kpc.
Anna Trindade Falcão, G. Fabbiano, M. Elvis, A. Paggi, W. P. Maksym   +4 more
doaj   +1 more source

JWST Insights into Narrow-line Little Red Dots

The Astrophysical Journal
JWST has revealed a population of red and compact objects with unique “V-shaped” spectral energy distributions (SEDs) known as “Little Red Dots” (LRDs). Many LRDs exhibit broad Balmer lines and thus likely host active galactic nuclei (AGNs).
Zijian Zhang, Linhua Jiang, Weiyang Liu, Luis C. Ho, Kohei Inayoshi   +4 more
doaj   +1 more source

A New Approach to Constraining Properties of Active Galactic Nucleus Host Galaxies by Combining Image and Spectral Energy Distribution Decomposition: Testing upon the MBH–M⋆ Relation

The Astrophysical Journal
The outshining light from active galactic nuclei (AGNs) poses significant challenges in studying the properties of AGN host galaxies. To address this issue, we propose a novel approach that combines image decomposition and spectral energy distribution ...
Haoran Yu, Lulu Fan, Yunkun Han, Weibin Sun, Yihang Zhang, Xuheng Ding, Yongquan Xue   +6 more
doaj   +1 more source

The Eddington Ratio Distribution of Narrow-line Active Galactic Nuclei

The Astronomical Journal
We measure the Eddington ratio distribution of local optical narrow-line active galactic nuclei (AGN) as a function of host galaxy properties, as a potential test of galaxy formation theories of AGN feedback. We extract central emission-line fluxes using
Michael R. Blanton, Arjun Suresh, Kyle B. Westfall, Dou Liu, John Moustakas   +4 more
doaj   +1 more source