Results 31 to 40 of about 256,920 (281)

Radio AGN in spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
Radio AGN in the nearby Universe are more likely to be found in galaxies with early-type morphology, the detection rate in spiral or late-type galaxies (LTGs) being around an order of magnitude lower. We combine the mJy Imaging VLBA Exploration at 20 cm (mJIVE-20) survey with the Sloan Digital Sky Survey, to study the relatively rare population of AGN ...
Kaviraj, Sugata, Shabala, Stanislav S., Deller, Adam T., Middelberg, Enno   +3 more
openaire   +4 more sources

Developing and adult reef fish show rapid light‐induced plasticity in their visual system

Molecular Ecology, Volume 32, Issue 1, Page 167-181, January 2023., 2023
Abstract The visual capabilities of fish are optimized for their ecology and light environment over evolutionary time. Similarly, fish vision can adapt to regular changes in light conditions within their lifetime, e.g., ontogenetic or seasonal variation.
Lily G. Fogg, Fabio Cortesi, Camille Gache, David Lecchini, N. Justin Marshall, Fanny de Busserolles   +5 more
wiley   +1 more source

Radio emission of Shakhbazian Compact Galaxy Groups [PDF]

, 1999
Three hundred fifty three radio sources from the NRAO VLA Sky Survey (NVSS) (Condon et al. 1998) and the FIRST Survey (White et al. 1997}, are detected in the areas of 179 Shakhbazian Compact Groups (ShCGs) of galaxies.
Amirkhanian A. S., Amirkhanian A. S., Baier F. W., Baldwin J. E., Barnes J., Cohen A. M., de Ruiter H. R., del Olmo A., H. M. Tovmassian, H. Tiersch, Kodaira K., Kodaira K., Kodaira K., Lynds C. R., Mendes de Oliveira C., Menon T. K., Menon T. K., O. V. Verkhodanov, Saracco P., Shakhbazian R. K., Stoll D., Stoll D., Tiersch H., Tiersch H., Tovmassian H. M., Tovmassian H. M., Tovmassian H. M., Tovmassian H. M., V. H. Chavushyan, Vennik J., Walke D. G.   +30 more
core   +2 more sources

Viewing Classical Radio Galaxies with the Upgraded GMRT and MeerKAT—A Progress Report

Galaxies, 2021
We present a progress report of a study of FR I and FR II radio galaxies. Several new morphological features in the radio emission are now revealed using the high (μJy) sensitivity reached in the range 550–1712 MHz, more than a factor of three, at the ...
Dharam V. Lal, Portia Legodi, Bernie Fanaroff, Tiziana Venturi, Oleg M. Smirnov, Marco Bondi, Kshitij Thorat, Landman H. Bester, Gyula I. G. Józsa, Dane Kleiner, Francesca Loi, Sphesihle Makhathini, Sarah V. White   +12 more
doaj   +1 more source

Multifrequency analysis of the radio emission from a post-merger galaxy CGCG 292-057 [PDF]

, 2023
Galaxies exhibiting a specific large-scale extended radio emission, such as X-shaped radio galaxies, belong to a rare class of winged radio galaxies. The morphological evolution of these radio sources is explained using several theoretical models, including galaxy mergers.
arxiv   +1 more source

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   +5 more sources

A search for candidate radio supernova remnants in the nearby irregular starburst galaxies NGC 4214 and NGC 4395 [PDF]

Serbian Astronomical Journal, 2005
We present the results of a search for new candidate radio su­pernova remnants (SNRs) in the nearby starburst irregular galaxies NGC 4214 and NGC 4395 using archived radio observations made with the Very Large Array (VLA) at the wavelengths of 3.5 cm, 6 ...
Vukotić B., Bojičić I., Pannuti T.G., Urošević Dejan V.   +3 more
doaj   +1 more source

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 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

Gas Outflows in Radio Galaxies [PDF]

Symposium - International Astronomical Union, 2004
We present a summary of our recent results on gas outflows in radio galaxies. Fast outflows (up to 2000 km s−1) have been detected both in ionized and neutral gas. The latter is particularly surprising as it shows that, despite the extremely energetic phenomena occurring near an AGN, some of the outflowing gas remains, or becomes again, neutral.
Clive Tadhunter, J. Holt, B. H. C. Emonts, Tom Oosterloo, Raffaella Morganti   +4 more
openaire   +4 more sources