Results 121 to 130 of about 189,366 (258)

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

The AGN/Normal Galaxy Connection : Summary [PDF]

, 1999
The connection between normal and active galaxies is reviewed, by summarizing our progress on answering nine key questions. (1) Do all galaxies contain massive dark objects (MDOs)? (2) Are these MDOs actually supermassive black holes? (3) Why are the dark objects so dark? (4) Do all galaxies contain an Active Galactic Nucleus (AGN)?
arxiv   +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

Physical properties of the CDFS X-ray sources through fitting spectral energy distributions [PDF]

, 2019
The physical parameters of galaxies and/or AGNs can be derived by fitting their multi-band spectral energy distributions (SEDs). By using CIGALE code, we perform multi-band SED fitting (from ultraviolet to infrared) for 791 X-ray sources (518 AGNs and 273 normal galaxies) in the 7 Ms Chandra Deep Field-south survey (CDFS). We consider the contributions
arxiv   +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

Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. II. Evidence for Tidally Enhanced Star Formation and Black Hole Accretion

, 2011
Active galactic nuclei (AGNs) are occasionally seen in pairs, suggesting that tidal encounters are responsible for the accretion of material by both central supermassive black holes (BHs). In Paper I of this series, we selected a sample of AGN pairs with
Abazajian, Abazajian, Adelman-McCarthy, Adelman-McCarthy, Adelman-McCarthy, Aihara, Bahcall, Balogh, Barth, Barton, Blanton, Blanton, Brinchmann, Ciotti, Ciotti, Coil, Cole, Comerford, Conselice, Daddi, Davis, Djorgovski, Drory, Ellison, Elvis, Ferrarese, Fu, Förster Schreiber, Gebhardt, Graham, Grogin, Hao, Heckman, Heckman, Hennawi, Hennawi, Ho, Holmberg, Hopkins, Hopkins, Kauffmann, Kaviraj, Kewley, Kochanek, Kormendy, Koss, Lauer, Lilly, Liu, Liu, Liu, Liu, Lotz, Lotz, López-Sanjuan, McGurk, Merritt, Michael A. Strauss, Miller, Myers, Noguchi, Petrosian, Reyes, Salim, Schawinski, Schlegel, Schmitt, Scoville, Serber, Shen, Shen, Shimasaku, Silverman, Silverman, Smith, Springel, Strateva, Strauss, Struck, Tacconi, Tremaine, Tremonti, Ueda, Vorontsov-Velyaminov, Wang, Woods, Woods, Worthey, Xin Liu, York, Yue Shen, Zhou   +91 more
core   +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

Recent Results from the SAFIR Project

Acta Polytechnica CTU Proceedings, 2014
The "Seyfert and star formation Activity in the Far-Infrared" (SAFIR) project is aimed at studying the physical nature of the nuclear IR emission and star formation properties of a small sample of nearby Seyfert galaxies observed with the PACS and SPIRE ...
M. Sánchez-Portal, M. Castillo-Fraile, C. Ramos Almeida, P. Esquej, A. Alonso-Herrero, A. M. Pérez García, J. Acosta-Pulido, B. Altieri, A. Bongiovanni, J. M. Castro Céron, J. Cepa, D. Coia, L. Conversi, J. Fritz, J. I. Gonzalez-Serrano, E. Hatziminaoglou, M. Povic, J. M. Rodrguez Espinosa, I. Valtchanov   +18 more
doaj   +1 more source

A Radio View of the Sky: the Cosmic History of Star-Forming and AGN Galaxies [PDF]

, 2009
We explore the cosmic evolution of radio detected star forming (SF) galaxies and active galactic nuclei (AGN), drawn from the VLA-COSMOS survey, out to z = 1.3.
Schinnerer, E., Smolčić, V., Zamorani, G.   +2 more
core  

Structures of Dusty and AGN Host Galaxies

, 2019
I will present a study of connection between star formation, active galactic nucleus (AGN), and galaxy morphology. By fitting optical to far-IR photometry with state-of-the-art spectral energy distribution (SED) techniques, we derive stellar masses, star formation rates, dust properties, and AGN contribution in galaxies over the whole COSMOS field. Our
openaire   +2 more sources