English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

(Abridged) We present the results from new 15 ks Chandra-ACIS and 4.9 GHzVery Large Array observations of 13 galaxies hosting low luminosity AGN. Thiscompletes the multiwavelength study of a sample of 51 nearby early-typegalaxies described in Capetti & Balmaverde (2005, 2006); Balmaverde & Capetti(2006). The aim of the three previous papers was to explore the connectionbetween the host galaxies and AGN activity in a radio-selected sample. Wedetect nuclear X-ray emission in eight sources and radio emission in all butone (viz., UGC6985). The new VLA observations improve the spatial resolution bya factor of ten: the presence of nuclear radio sources in 12 of the 13 galaxiesconfirms their AGN nature. As previously indicated, the behavior of the X-rayand radio emission in these sources depends strongly on the form of theiroptical surface brightness profiles derived from Hubble Space Telescopeimaging, i.e., on their classification as "core", "power-law" or "intermediate"galaxies. With more than twice the number of "power-law" and "intermediate"galaxies compared to previous work, we confirm with a much higher statisticalsignificance that these galaxies lie well above the radio-X-ray correlationestablished in FRI radio galaxies and the low-luminosity "core" galaxies. Thisresult highlights the fact that the "radio-loud/radio-quiet" dichotomy is afunction of the host galaxy's optical surface brightness profile. We presentradio-optical-X-ray spectral indices for all 51 sample galaxies. Survivalstatistics point to significant differences in the radio-to-optical andradio-to-X-ray spectral indices between the "core" and "power-law" galaxies(Gehan's Generalized Wilcoxon test probability "p" for the two classes beingstatistically similar is <10^-5), but not in the optical-to-X-ray spectralindices (p=0.25).

Examining the Radio-Loud/Radio-Quiet dichotomy with new Chandra and VLA observations of 13 UGC galaxies