Results 161 to 170 of about 533 (185)

A decade of sub-arcsecond imaging with the International LOFAR Telescope. [PDF]

Astrophys Space Sci
Morabito LK, Jackson N, de Jong J, Escott E, Groeneveld C, Mahatma V, Petley J, Sweijen F, Timmerman R, van Weeren RJ.   +9 more
europepmc   +1 more source

Feedback mechanisms stopping the star formation in a pair of massive galaxies in the early Universe

Pérez-González P, D'Eugenio F, Pino BRD, Perna M, Uebler H, Maiolino R, Arribas S, Lamperti I, Bunker A, Carniani S, Charlot S, Willott C, Böker T, Parlanti E, Scholtz J, Venturi G, Barro G, Costantin L, Navarro IM, Dunlop J, Magee D, Cresci G.   +21 more
europepmc   +1 more source

Electromagnetic and gravitational radiation of blazar OJ 287. [PDF]

iScience
Volvach A, Volvach L, Larionov M.
europepmc   +1 more source

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Accretion properties of low‐luminosity active galactic nuclei

Astronomische Nachrichten, 2021
AbstractWe aim to leverage the transformational science enabled by the Event Horizon Telescope (EHT) to study the physics of, and near, the black holes in a sample of galaxies covering a large parameter space in supermassive black hole mass, accretion rate, and jet power. To this end, we work on a sample of nearby galaxies whose directly measured black
Venkatessh Ramakrishnan, Chi‐Kwan Chan, Neil Nagar   +2 more
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Radio sources in low-luminosity active galactic nuclei [PDF]

Astronomy and Astrophysics, 2002
to appear in A& ...
Heino Falcke, N M Nagar, A S Wilson
exaly   +3 more sources

Starbursts in Low Luminosity Active Galactic Nuclei

2005
Low Luminosity Active Galactic Nuclei (LLAGN), which comprise low-ionization nuclear emission-line regions (LINERs) and transition-type objects (TOs), represent the most common type of nuclear activity. Here, we search for spectroscopic signatures of starbursts and post-starbursts in LLAGN, and investigate their relationship to the ionization mechanism
Rosa M. González Delgado, Roberto Cid Fernandes   +1 more
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Revealing Low Luminosity Active Galactic Nuclei (ReveaLLAGN)

2021
JWST will be the most sensitive tool ever built for studying the accretion onto supermassive black holes (SMBHs) at the centers of galaxies. While quasars and bright active galactic nuclei (AGN) provide spectacular examples of this accretion, a vast majority of galaxies have black holes accreting at much lower rates.
Seth, Anil C., Boeker, Torsten, Burtscher, Leonard, Davis, Timothy Andrew, Dumont, Antoine Andre, Feldmeier-Krause, Anja, Fernandez Ontiveros, Juan Antonio, Gallo, Elena, Greene, Jenny Emma, Gultekin, Kayhan, Ho, Luis C., Hoenig, Sebastian F., Kamann, Sebastian, Kirkpatrick, Allison, Luetzgendorf, Nora, Markoff, Sera, Neumayer, Nadine, Pellegrini, Eric William, Plotkin, Richard M., Prieto, Almudena, Reines, Amy E., Runnoe, Jessie Caye, Satyapal, Shobita, Strader, Jay, Trump, Jonathan R., Voggel, Karina, Walsh, Jonelle L., Yuan, Feng, van de Ven, Glenn   +28 more
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Ly  constraints on very low luminosity active galactic nuclei

Monthly Notices of the Royal Astronomical Society, 2006
Recent surveys have detected Lya emission from z = 4.5 to 6.5 at luminosities as low as 10 41 erg s -1 . There is good evidence that low numbers of active galactic nuclei (AGN) are among observed faint Lya emitters. Combining these observations with an empirical relation between the intrinsic Lya and B-band luminosities of AGN, we obtain an upper ...
M. Dijkstra, J. Stuart, B. Wyithe
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Physical Conditions in Low-Luminosity Active Galactic Nuclei

1984
Physical conditions in the nuclei of emission-line galaxies are investigated by analyzing their continua and optical emission lines. The strength and shape of the nonstellar continuum is derived for nine Seyfert galaxies. As in QSOs, it is described by a power law with slope ~ -1.1, and in the most luminous objects it flattens at blue and UV ...
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The Luminosity Function of Quasars and Low Luminosity Active Galactic Nuclei

1986
The quasar luminosity function is extended to include the nuclear luminosities of Seyfert 1 galaxies. The model is fitted to the (total) luminosity data for the active galaxies from a complete flux-limited survey. A good fit is obtained with dN/dL∝L-1.2, matching onto the steeper quasar luminosity function near MB=-22.
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