Results 21 to 30 of about 96,351 (238)

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

open access: yesGalaxies, 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   +12 more
doaj   +1 more source

Radio Galaxy Zoo: new giant radio galaxies in the RGZ DR1 catalogue [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2020
ABSTRACT In this paper, we present the identification of five previously unknown giant radio galaxies (GRGs) using Data Release 1 of the Radio Galaxy Zoo citizen science project and a selection method appropriate to the training and validation of deep learning algorithms for new radio surveys.
H Tang   +7 more
openaire   +3 more sources

Distant FR I radio galaxies in the Hubble Deep Field: implications for the cosmological evolution of radio-loud AGN [PDF]

open access: yes, 2001
Deep and high resolution radio observations of the Hubble Deep Field and flanking fields have shown the presence of two distant edge-darkened FR I radio galaxies, allowing for the first time an estimate of their high redshift space density.
Baum   +21 more
core   +2 more sources

Radio Galaxy Zoo: host galaxies and radio morphologies derived from visual inspection [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2015
Accepted to MNRAS, 17 pages, 13 figures, 1 table.
Banfield, J. K.   +35 more
openaire   +9 more sources

A closer view of the radio-FIR correlation: disentangling the contributions of star formation and AGN activity [PDF]

open access: yes, 2010
We extend the Unified Radio Catalog, a catalog of sources detected by various (NVSS, FIRST, WENSS, GB6) radio surveys, and SDSS, to IR wavelengths by matching it to the IRAS Point and Faint Source catalogs.
A. Kimball   +25 more
core   +4 more sources

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

open access: yesSerbian 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.   +3 more
doaj   +1 more source

Radio Galaxy Spectra

open access: yes, 2001
4 pages, 3 figures, submitted to 'Particles & Fields in Radio Galaxies' eds Laing & Blundell, ASP conference ...
Jackson, C, Wall, J
openaire   +3 more sources

Extremely Red Radio Galaxies [PDF]

open access: yes, 2001
At least half the radio galaxies at z>1 in the 7C Redshift Survey have extremely red colours (R-K>5), consistent with stellar populations which formed at high redshift (z>5). We discuss the implications of this for the evolution of massive galaxies in general and for the fraction of near-IR-selected EROs which host AGN, a result which is now ...
Willott, C, Rawlings, S, Blundell, K
openaire   +3 more sources

Cosmological Studies with Radio Galaxies and Supernovae [PDF]

open access: yes, 2008
Physical sizes of extended radio galaxies can be employed as a cosmological "standard ruler", using a previously developed method. Eleven new radio galaxies are added to our previous sample of nineteen sources, forming a sample of thirty objects with ...
Alexander   +50 more
core   +3 more sources

Why Are Radio-Galaxies Prolific Producers of Type Ia Supernovae? [PDF]

open access: yes, 2005
An analysis of SNIa events in early type galaxies from the Cappellaro et al (1999) database provides conclusive evidence that the rate of type Ia Supernovae (SNe) in radio-loud galaxies is about 4 times higher than the rate measured in radio-quiet ...
Bondi H.   +17 more
core   +2 more sources

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