Results 41 to 50 of about 97,087 (224)

Evolution of the Most Massive Galaxies to z ~ 0.6: II. The link between radio AGN activity and star formation [PDF]

, 2012
We analyze the optical spectra of massive (log M*/Msun > 11.4) radio-loud galaxies at z~0.2 and z~0.6. By comparing stellar population parameters of these radio-loud samples with radio-quiet control samples, we investigate how the presence of a radio ...
Abazajian, Ahn, Aihara, Becker, Best, Best, Best, Best, Best, Binney, Boehringer, Bolton, Bower, Brinchmann, Bruzual, Bîrzan, Bîrzan, Catinella, Cavagnolo, Chen, Chen, Chen, Christy A. Tremonti, Churazov, Colless, Condon, Condon, Croton, David Wake, Dawson, Donald P. Schneider, Donoso, Donoso, Dunlop, Eisenstein, Fabian, Fabian, Fabian, Forman, Fukugita, Guinevere Kauffmann, Gunn, Gunn, Heckman, Hogg, Hong Guo, Johnston, Karim, Kauffmann, Kauffmann, Kauffmann, Kauffmann, Kevin Schawinski, Mandelbaum, Mauch, Nesvadba, Padmanabhan, Pier, Rawlings, Rola, Sadler, Saintonge, Salim, Schawinski, Schawinski, Schlegel, Simon White, Smee, Strauss, Timothy M. Heckman, Tremonti, Wake, Wake, White, Yan-Mei Chen, York, Zheng   +76 more
core   +4 more sources

Combining LOFAR and Apertif Data for Understanding the Life Cycle of Radio Galaxies

Galaxies, 2021
Active galactic nuclei (AGN) at the centres of galaxies can cycle between periods of activity and of quiescence. Characterising the duty-cycle of AGN is crucial for understanding their impact on the evolution of the host galaxy.
Raffaella Morganti, Nika Jurlin, Tom Oosterloo, Marisa Brienza, Emanuela Orrú, Alexander Kutkin, Isabella Prandoni, Elizabeth A. K. Adams, Helga Dénes, Kelley M. Hess, Aleksandar Shulevski, Thijs van der Hulst, Jacob Ziemke   +12 more
doaj   +1 more source

The core fundamental plane of B2 radio galaxies

, 2009
The photometric, structural and kinematical properties of the centers of elliptical galaxies, harbor important information of the formation history of the galaxies.
Balmaverde, Bernardi, Bettoni, Bettoni, Capetti, Capetti, Capetti, Colla, D. Bettoni, De Juan, De Koff, de Ruiter, de Ruiter, de Ruiter, Desroches, Emonts, Emonts, Faber, Fanti, Fanti, Ferrarese, González-Serrano, H. de Ruiter, Hyde, Jaffe, Jørgensen, Kormendy, Lauer, Massaglia, Morganti, Morganti, Noel-Storr, Ochsenbein, P. Parma, Parma, Paturel, R. Falomo, R. Fanti, Sargent, Trussoni, Verdoes Kleijn   +40 more
core   +1 more source

Radio continuum spectra of galaxies in the Virgo cluster region [PDF]

, 2004
New radio continuum observations of galaxies in the Virgo cluster region at 4.85, 8.6, and 10.55 GHz are presented. These observations are combined with existing measurements at 1.4 and 0.325 GHz.
B. Vollmer, Beck, Binggeli, Bravo-Alfaro, Cayatte, Cayatte, Chamaraux, Combes, Condon, de Jong, Gavazzi, Gavazzi, Gavazzi, Gavazzi, Gavazzi, Giovanelli, Gunn, Kotanyi, M. Thierbach, Niklas, Niklas, Otmianowska-Mazur, Ott, R. Wielebinski, Sofue, Vollmer, Vollmer, Wunderlich   +27 more
core   +1 more source

Radio Galaxies—The TeV Challenge [PDF]

Galaxies, 2018
Over the past decade, our knowledge of the γ -ray sky has been revolutionized by ground- and space-based observatories by detecting photons up to several hundreds of tera-electron volt (TeV) energies. A major population of the γ -ray bright objects are active galactic nuclei (AGN) with their relativistic jets pointed along our line-of-sight ...
openaire   +3 more sources

Radio Galaxies at VHE Energies [PDF]

Galaxies, 2018
Radio Galaxies have by now emerged as a new γ-ray emitting source class on the extragalactic sky. Given their remarkable observed characteristics, such as unusual gamma-ray spectra or ultrafast VHE variability, they represent unique examples to probe the nature and physics of active galactic nuclei (AGN) in general.
Frank Rieger, Amir Levinson
openaire   +3 more sources

RAD@home Citizen Science Discovery of Two Spiral Galaxies Where the 30–220 kpc Radio Lobes Are Possibly Shaped by Ram Pressure Stripping

Galaxies
We report the RAD@home citizen science discovery of two rare spiral-host radio galaxies (NGC 3898 and WISEA J221656.57-132042434.1 or RAD-“Thumbs up” galaxy), both exhibiting asymmetric radio lobes extending over 30 to 220 kiloparsec scales. We present a
Prakash Apoorva, Ananda Hota, Pratik Dabhade, P. K. Navaneeth, Dhruv Nayak, Arundhati Purohit   +5 more
doaj   +1 more source

The Photometric and Spectroscopic Properties of Remnant and Restarted Radio Galaxies in the Lockman Hole Field

Galaxies, 2021
Radio galaxies are known to undergo phases of activity, where the stage after the jets have switched off is referred to as the remnant phase. This state can be followed by a restarted phase when the activity reignites. Remnant and restarted radio sources
Nika Jurlin, Raffaella Morganti, Natasha Maddox, Marisa Brienza   +3 more
doaj   +1 more source

Radio Continuum Emission at 1.4 GHz from KISS Emission-Line Galaxies

, 2004
We have searched the Faint Images of the Radio Sky at Twenty centimeters (FIRST) and the NRAO VLA Sky Survey (NVSS) 1.4 GHz radio surveys for sources that are coincident with emission-line galaxy (ELG) candidates from the KPNO International Spectroscopic
Benn C. R., Brinkmann W., Caryl Gronwall, Eli Beckerman, J. J. Condon, Jeffrey Van Duyne, John J. Salzer, Kron R. G., Lisa M. Frattare, Lynden-Bell D., Markarian B. E., Prandoni I., Trinh X. Thuan   +12 more
core   +1 more source

Statistical Properties of Radio Emission from the Palomar Seyfert Galaxies [PDF]

, 2001
We have carried out an analysis of the radio and optical properties of a statistical sample of 45 Seyfert galaxies from the Palomar spectroscopic survey of nearby galaxies.
Antonucci R. R. J., Busko I. C., Clark D. H., de Bruyn A. G., de Bruyn A. G., de Grijp M. H. K., Isobe T., James S. Ulvestad, Kukula M. J., Luis C. Ho, Meurs E. J. A., Pedlar A., Perley R. A., Unger S. W., Whittle M., Whittle M.   +15 more
core   +2 more sources