Results 81 to 90 of about 256,920 (281)

Pair-Matching of Radio-Loud and Radio-Quiet AGNs

Frontiers in Astronomy and Space Sciences, 2017
Active galactic nuclei (AGNs) are known to cover an extremely broad range of radio luminosities and the spread of their radio-loudness is very large at any value of the Eddington ratio.
Dorota Kozieł-Wierzbowska, Grażyna Stasińska, Natalia Vale Asari, Marek Sikora, Elisa Goettems, Anna Wójtowicz   +5 more
doaj   +1 more source

Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range

The Astrophysical Journal, 2023
We analyze radio continuum emission of early-type galaxies with dynamical measurements of central supermassive black hole (SMBH) masses and well-characterized large-scale environments, but regardless of the exact level of the nuclear activity.
Anna Wójtowicz, Łukasz Stawarz, C. C. Cheung, Norbert Werner, Dominik Rudka   +4 more
doaj   +1 more source

Radio, optical and X-ray nuclei in nearby 3CRR radio galaxies [PDF]

, 1999
HST observations have shown that low-redshift 3CR radio galaxies often exhibit a point-like optical component positionally coincident with the GHz-frequency radio core. In this paper we discuss the correlation between the luminosities of the radio, optical and X-ray cores in these objects, and argue that all three components have a common origin at the
arxiv   +1 more source

Optical and Radio Properties of Extragalactic Sources Observed by the FIRST and SDSS Surveys

, 2002
We discuss the optical and radio properties of 30,000 FIRST sources positionally associated with an SDSS source in 1230 deg$^2$ of sky. The majority (83%) of the FIRST sources identified with an SDSS source brighter than r=21 are optically resolved.
Ali Kinkhabwala, Aniruddha R. Thakar, Antonucci R., Brian Yanny, Christy Tremonti, Constance M. Rockosi, Daniel E. Vanden Berk, Daniel Eisenstein, David Schlegel, Donald G. York, Donald P. Schneider, Douglas Finkbeiner, Francis P. J., Gillian R. Knapp, Gordon T. Richards, Gregory S. Hennessy, Iskra Strateva, James E. Gunn, Jeffrey A. Munn, Jonathan Brinkmann, Joshua Frieman, Kristen Menou, Kristian Finlator, Machalski J., Mamoru Doi, Mariangela Bernardi, Mark SubbaRao, Masataka Fukugita, Michael A. Strauss, Michael A. Weinstein, Michael Blanton, Miller L., Neta A. Bahcall, Pat B. Hall, Peacock J. A., Richard L. White, Rita S. J. Kim, Robert C. Nichol, Robert H. Becker, Robert H. Lupton, Scott Anderson, Strittmatter P. A., Vijay K. Narayanan, Willot C. J., Wolfgang Voges, Xiaohui Fan, Željko Ivezić   +46 more
core   +1 more source

A Complete Sample of Radio Galaxies [PDF]

Symposium - International Astronomical Union, 1982
We report here some preliminary results of a multi-wavelength study of a complete sample of radio galaxies. The sample is comprised of 93 radio sources from the Parkes 11 cm catalog which are identified with galaxies of 17th magnitude or brighter in the declination zone −17° to −40°. Our objective is to cross-correlate the radio, infrared, optical, and
P. A. Shaver, Jasper Wall, David Malin, Wm Goss, R. A. E. Fosbury, I. J. Danziger, Ron Ekers, A. F. M. Moorwood   +7 more
openaire   +2 more sources

Non‐thermal plasma decontamination of microbes: a state of the art

Biotechnology Progress, EarlyView.
Abstract Microbial decontamination is a critical concern in various sectors, from healthcare to food processing. Traditional decontamination methods, while effective to a degree, present limitations in terms of environmental impact, efficiency, and potential harm to the target material. This review investigates the emerging realm of non‐thermal plasma (
Yiyi Xu, Amarjeet Bassi
wiley   +1 more source

Dwarf Galaxies with Radio-excess Active Galactic Nuclei in the Very Large Array Sky Survey

The Astrophysical Journal
We present a systematic search for radio active galactic nuclei (AGNs) in dwarf galaxies using recent observations taken by the Very Large Array Sky Survey (VLASS).
John-Michael Eberhard, Amy E. Reines, Hansung B. Gim, Jeremy Darling, Jenny E. Greene   +4 more
doaj   +1 more source

The Clustering Of Galaxies Around Radio-Loud AGNs

, 2013
We examine the hypothesis that mergers and close encounters between galaxies can fuel AGNs by increasing the rate at which gas accretes towards the central black hole.
Beutler, Florian, Brown, Michael J. I., Floyd, David J. E., Jones, D. Heath, Worpel, Hauke   +4 more
core   +1 more source

On black hole masses, radio-loudness and bulge luminosities of Seyfert galaxies [PDF]

, 2001
We estimated black hole masses for 9 Seyfert 1 and 13 Seyfert 2 galaxies in the Palomar and CfA bright Seyfert samples using the tight correlation between black hole mass and bulge velocity dispersion.
Adams, Begelman, Blandford, Blandford, Blundell, Boller, Boroson, Di Matteo, Dunlop, Faber, Faber, Fabian, Falcke, Falcke, Ferrarese, Ferrarese, Franceschini, Gebhardt, Gebhardt, Genzel, Ghez, Haehnelt, Haehnelt, Haiman, Ho, Ho, Ho, Ho, Ho, Huchra, Huchra, J. L. Han, Kaspi, Kaspi, Kauffmann, Kormendy, Krolik, Kukula, Kukula, Laor, Laor, Laor, Lyden-Bell, Magorrian, Mathur, Merritt, Nelson, Nelson, Osterbrock, Rees, Sadler, Sadler, Schmidt, Shakura, Silk, Simien, Véron, Wandel, Wandel, Wang, Whittle, Worthey, Xue-Bing Wu   +62 more
core   +3 more sources

On dynamical models for radio galaxies [PDF]

New Astronomy Reviews, 2002
The tailed radio galaxies that have been called ``Type I'' are not a uniform set. To study their dynamics, we have used the Ledlow-Owen data set, which provides a new sample of 250 radio galaxies in nearby Abell clusters. These sources divide into two clear categories based on their radio morphology.
Frazer N. Owen, T. Markovic, P. Hardee, M. J. Ledlow, Jean A. Eilek   +4 more
openaire   +3 more sources