Results 91 to 100 of about 80,128 (249)

Induced starburst and nuclear activity: Faith, facts, and theory [PDF]

The problem of the origin of starburst and nuclear (nonstellar) activity in galaxies is reviewed. A physical understanding of the mechanism(s) that induce both types of activity requires one to address the following issues: (1) what is the source of fuel
Shlosman, Isaac
core   +1 more source

THE LONG-TERM CENTIMETER VARIABILITY OF ACTIVE GALACTIC NUCLEI: A NEW RELATION BETWEEN VARIABILITY TIMESCALE AND ACCRETION RATE* [PDF]

, 2017
Jongho Park, Sascha Trippe
openalex   +1 more source

VLA FRAMEx. III. Circumnuclear Radio Emission Mechanisms in Hard X-Ray Selected Active Galactic Nuclei

The Astrophysical Journal
We present Stokes I continuum analysis for a volume-limited sample (
Andrew J. Sargent, Alexander J. van der Horst, Megan C. Johnson, Nathan J. Secrest, Travis C. Fischer, Onic I. Shuvo, Macon A. Magno, Luis C. Fernandez   +7 more
doaj   +1 more source

Star formation around active galactic nuclei [PDF]

Active galactic nuclei (Seyfert nuclei and their relatives) and intense star formation can both deliver substantial amounts of energy to the vicinity of a galactic nucleus.
Keel, William C.
core   +1 more source

Mechanism of the Changing Look phenomenon in Active Galactic Nuclei [PDF]

, 2019
Marzena Śniegowska, B. Czerny
openalex   +1 more source

VLA FRAMEx. II. Radio Spectra of Nearby Active Galactic Nuclei at Subarcsecond Resolution

The Astrophysical Journal
We present 4–12 GHz in-band spectral energy distributions with accompanying 6 GHz and 10 GHz imaging results for a volume-complete sample ( 0) spectral indices.
Andrew J. Sargent, Alexander J. van der Horst, Megan C. Johnson, Travis C. Fischer, Nathan J. Secrest, Phil J. Cigan, Onic I. Shuvo, Krista L. Smith   +7 more
doaj   +1 more source

The suppression of star formation by powerful active galactic nuclei [PDF]

, 2012
M. J. Page, M. Symeonidis, J. D. Vieira, B. Altieri, A. Amblard, V. Arumugam, I Tereno, T. Babbedge, A. W. Blain, J. Böck, A. Boselli, V. Buat, N. Castro-Rodríguez, A. Cava, P. Chanial, D. L. Clements, A. Conley, L. Conversi, Asantha Cooray, C. D. Dowell, E. N. Dubois, J. S. Dunlop, E. Dwek, S. Dye, S. Eales, D. Elbaz, D. Farrah, M. Fox, A. Franceschini, W. K. Gear, J. Glenn, M. Griffin, M. Halpern, E. Hatziminaoglou, E. Ibar, K. G. Isaak, R. J. Ivison, G. Lagache, L. Levenson, N. Lu, S. C. Madden, B. Maffei, G Mainetti, L. Marchetti, H. T. Nguyen, B. O’Halloran, S. J. Oliver, A. Omont, P. Panuzzo, Ανδρέας Παπαγεωργίου, C. P. Pearson, I. Pérez-Fournón, M. Pohlen, J. I. Rawlings, D. Rigopoulou, L. Riguccini, D. Rizzo, Laura Bisigello, I. G. Roseboom, M. Rowan-Robinson, M. Sánchez Portal, B. Schulz, D. Scott, N. Seymour, D. L. Shupe, A. J. Smith, J. A. Stevens, M. Trichas, K. E. Tugwell, M. Vaccari, I. Valtchanov, M. Viero, L. Vigroux, L. Wang, R. Ward, Gillian Wright, C. K. Xu, M. Zemcov   +77 more
openalex   +1 more source

Modeling the Reverberation Response of the Broad Line Region in Active Galactic Nuclei [PDF]

, 2023
Sara Rosborough, A. Robinson, Triana Almeyda, Madison Noll   +3 more
openalex   +1 more source

Test for Echo: X-Ray Reflection Variability in the Seyfert-2 Active Galactic Nucleus NGC 4388

The Astrophysical Journal
We report on a study of the narrow Fe K α line and reflection spectrum in the well-known Seyfert-2 active galactic nucleus (AGN), NGC 4388. X-ray spectra summed from two extensive NICER monitoring campaigns, separated by years, show strong evidence of ...
Ben Gediman, Jon M. Miller, Abderahmen Zoghbi, Paul Draghis, Zaven Arzoumanian, W. N. Brandt, Keith Gendreau   +6 more
doaj   +1 more source

Active Galactic Nuclei in polarized light

Open Astronomy, 2019
Due to the compactness active galactic nuclei (AGN) are still unresolved with optical observations. However, structure and physical conditions of the matter in their central parts are especially important to study the processes of the matter accretion to
Shablovinskaya Elena, Afanasiev Viktor
doaj   +1 more source