Results 31 to 40 of about 31,213 (262)

The gamma‐ray emission from young radio galaxies and quasars

Astronomische Nachrichten, Volume 342, Issue 9-10, Page 1176-1179, November-December 2021., 2021
Abstract According to radiative models, radio galaxies are predicted to produce γ‐rays from the earliest stages of their evolution onwards. The study of the high‐energy emission from young radio sources is crucial for providing information on the most energetic processes associated with these sources, the actual region responsible for this emission, as
Giacomo Principe, Leonardo Di Venere, Giulia Migliori, Monica Orienti, Filippo D'Ammando, the Fermi‐LAT Collaboration   +5 more
wiley   +1 more source

Morphologies of z~0.7 AGN host galaxies in CANDELS : no trend of merger incidence with AGN luminosity [PDF]

, 2014
PS would like to acknowledge funding through grant ASI I/005/11/0. DKoo would like to acknowledge funding through grant NSF AST-0808133. SJ acknowledges financial support from the EC through an ERC grant StG-257720.The processes that trigger active ...
Bell, E.~F., Chang, Y.-Y., Conselice, C.~J., Croton, D., Dahlen, T., Dekel, A., Faber, S.~M., Grogin, N., Guo, Y., Hamann, F., Hamilton, T., Hopkins, P.~F., Juneau, S., Kartaltepe, J., Kocevski, D., Koekemoer, A., Koo, D.~C., Lotz, J., McGrath, E.~J., McIntosh, D., Mozena, M., Rosario, D.~J., Santini, P., Somerville, R., van der Wel, A., Villforth, C., Wild, V.   +26 more
core   +4 more sources

Jet propagation through inhomogeneous media and shock ionization

Astronomische Nachrichten, Volume 342, Issue 9-10, Page 1171-1175, November-December 2021., 2021
Abstract In this contribution, we present the first numerical simulations of a relativistic outflow propagating through the inner hundreds of parsecs of its host galaxy, including atomic and ionized hydrogen, and the cooling effects of ionization. Our results are preliminary, but we observe efficient shock ionization of atomic hydrogen in interstellar ...
Manel Perucho, Jose López‐Miralles, Victoria Reynaldi, Álvaro Labiano   +3 more
wiley   +1 more source

The host galaxy/AGN connection [PDF]

Astronomy & Astrophysics, 2007
[ABRIDGED] We recently presented evidence of a connection between the brightness profiles of nearby early-type galaxies and the properties of the AGN they host. The radio loudness of the AGN appears to be univocally related to the host's brightness profile: radio-loud nuclei are only hosted by ``core'' galaxies while radio-quiet AGN are only found in ``
Capetti, Alessandro, Balmaverde, Barbara
openaire   +2 more sources

The central FR0 in the sloshing cluster Abell 795: Indications of mechanical feedback from Chandra data

Astronomische Nachrichten, Volume 342, Issue 9-10, Page 1207-1211, November-December 2021., 2021
Abstract We present a detailed study of the galaxy cluster Abell 795 and of its central Fanaroff‐Riley Type 0 (FR0) radio galaxy. From an archival Chandra observation, we found a dynamically disturbed environment with evidences for sloshing of the intracluster medium.
Francesco Ubertosi, Myriam Gitti, Eleonora Torresi, Fabrizio Brighenti, Paola Grandi   +4 more
wiley   +1 more source

The bulge-disc decomposition of AGN host galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We present the results from a study of the morphologies of moderate luminosity X-ray selected AGN host galaxies in comparison to a carefully mass-matched control sample at 0.5 < z < 3 in the CANDELS GOODS-S field. We apply a multi-wavelength morphological decomposition analysis to these two samples and report on the differences between the ...
V. A. Bruce, J. S. Dunlop, A. Mortlock, D. D. Kocevski, E. J. McGrath, D. J. Rosario   +5 more
openaire   +3 more sources

The Kiloparsec-scale Influence of the AGN in NGC 1068 with SALT RSS Fabry–Pérot Spectroscopy

The Astronomical Journal, 2023
We present Fabry–Pérot (FP) imaging and longslit spectroscopy of the nearby Seyfert II galaxy NGC 1068 using the Robert Stobie Spectrograph (RSS) on the Southern African Large Telescope (SALT) to observe the impact of the central active galactic nucleus (
Raphael E. Hviding, Ryan C. Hickox, Petri Väisänen, Rajin Ramphul, Kevin N. Hainline   +4 more
doaj   +1 more source

Do Moderate-Luminosity Active Galactic Nuclei Suppress Star Formation? [PDF]

, 2009
The growth of supermassive black holes and their host galaxies are thought to be linked, but the precise nature of this symbiotic relationship is still poorly understood. Both observations and simulations of galaxy formation suggest that the energy input
Adelman-McCarthy, Anderson, Antonucci, Bronika Kushkuley, Brooke Simmons, Bundy, C. Megan Urry, Conselice, Constantin, Ezequiel Treister, Ferrarese, Gebhardt, Gehrels, Hopkins, Häring, Johansson, Kaviraj, Kaviraj, Kevin Schawinski, Li, Martini, Martini, Nandra, Peng, Salim, Schawinski, Schawinski, Shanil Virani, Silverman, Simmons, Sugata Kaviraj, Treister, Tueller, Voges, Wild, Yi, York   +36 more
core   +4 more sources

AGN host galaxy mass function in COSMOS [PDF]

Astronomy & Astrophysics, 2016
15 pages, 10 figures, accepted for publication in A& ...
Bongiorno, A, Schulze, A., Merloni, A., Zamorani, G., Ilbert, O., La Franca, F., Peng, Y., Piconcelli, E., Mainieri, V., Silverman, J. D., BRUSA, MARCELLA, Fiore, F., Salvato, M., Scoville, N.   +13 more
openaire   +4 more sources

Relation between AGN type and host galaxy properties [PDF]

Astronomy & Astrophysics, 2021
We use 3213 active galactic nuclei (AGNs) from the XMM-XXL northern field to investigate the relation of AGN type with host galaxy properties. Applying a Bayesian method, we derive the hardness ratios, and through these the hydrogen column density (NH) for each source. We consider those with NH > 1021.5 cm−2 as absorbed sources (type 2).
Masoura, V. A., Mountrichas, G., Georgantopoulos, I., Plionis, M.   +3 more
openaire   +3 more sources