Results 11 to 20 of about 1,281,453 (204)
A Morphological Study of AGN-host Dwarf Galaxies
The Astrophysical JournalThe study of morphology in galaxies offers a convenient and quantitative method to measure the shapes and characteristics of galaxy light distribution that reflect the evolutionary history.
Jie Tian +3 more
doaj +4 more sources
, 2001 The relationship of an AGN to its host galaxy is a crucial question in the study of galaxy evolution. We perform stellar population synthesis in the central regions of galaxies of different activity levels. A large number of stellar features are measured both in the optical and near-infrared.
Boisson, C., Joly, M.
core +7 more sources
GALAXIES ON DIET: FEEDBACK SIGNATURES IN RADIO-AGN HOST GALAXIES [PDF]
Publications of The Korean Astronomical Society, 2017 There exists strong evidence supporting the co-evolution of central supermassive black holes and their host galaxies; however it is still under debate how such a relation comes about and whether it is relevant for all or only a subset of galaxies. An important mechanism connecting AGN to their host galaxies is AGN feedback, potentially heating up or ...
Karouzos, Marios +21 more
openaire +3 more sources
The Interplay between Radio AGN Activity and Their Host Galaxies [PDF]
Galaxies, 2023 Radio activity in AGN (Active Galactic Nuclei) produce feedback on the host galaxy via the impact of the relativistic jets on the circumnuclear gas. Although radio jets can reach up to several times the optical radius of the host galaxy, in this review we focus on the observation of the feedback deposited locally in the central region of the host ...
Guilherme S. Couto +1 more
openaire +4 more sources
The Coevolution of AGN and Their Host Galaxies in Late Stage Mergers [PDF]
, 2021 As galaxies grow and evolve, the supermassive black holes (SMBHs) thought to exist at the center of most galaxies coevolve with them. During periods of growth, these SMBHs can become observable as active galactic nuclei (AGN).
Stemo, Aaron Michael
core +8 more sources
The smallest AGN host galaxies [PDF]
New Astronomy Reviews, 2006 We describe our efforts to study dwarf galaxies with active nuclei, whose black holes, with masses < 10^6 M_sun, provide the best current observational constraints on the mass distribution of primordial seed black holes. Although these low-mass galaxies do not necessarily contain classical bulges, Barth, Greene, & Ho (2005) show that their ...
Greene, J. E., Barth, A. J., Ho, L. C.
openaire +2 more sources
High‐Energy Neutrinos from the Cosmos
Annalen der Physik, Volume 533, Issue 11, November 2021., 2021 The IceCube Neutrino Observatory is the first detector of its kind, designed to observe the cosmos from deep within the South Pole ice. It consists of a cubic kilometer of instrumented transparent ice transformed into a Cherenkov detector. IceCube's first decade of operations has yielded breakthrough results, including the discovery of very high energy
Francis Halzen
wiley +1 more source
Peaked sources and narrow‐line Seyfert 1s: A love story
Astronomische Nachrichten, Volume 342, Issue 9-10, Page 1066-1070, November-December 2021., 2021 Abstract The first similarities between peaked sources (PS) and narrow‐line Seyfert 1 (NLS1) galaxies were noticed already 20 years ago. Nowadays, it is known that several sources can share both classifications, and that part of the parent population of γ‐ray emitting NLS1s could be hiding among PS.
Marco Berton, Emilia Järvelä
wiley +1 more source
The impact of young radio jets traced by cold molecular gas
Astronomische Nachrichten, Volume 342, Issue 9-10, Page 1135-1139, November-December 2021., 2021 Abstract Ranging from a few pc to hundreds of kpc in size, radio jets have, during their evolution, an impact on their gaseous environment on a large range of scales. While their effect on larger scales is well established, it is now becoming clear that they can also strongly affect the interstellar medium (ISM) inside the host galaxy.
Raffaella Morganti +3 more
wiley +1 more source
Extremely inverted peaked spectrum radio sources
Astronomische Nachrichten, Volume 342, Issue 9-10, Page 1126-1129, November-December 2021., 2021 Abstract We report our ongoing search for extremely inverted spectrum compact radio galaxies, for which the defining feature in the radio spectrum is not the spectral peak, but instead the slope of the spectrum () in the high‐opacity (i.e., lower frequency) part of the radio spectrum.
Mukul Mhaskey +2 more
wiley +1 more source