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

We present a near infrared spectroscopic atlas of nearby, bright early-typegalaxies with radio emission, containing 163 galaxies observed by the Palomar200" TripleSpec instrument, measuring the emission line fluxes for H, He, [FeII] and H$_2$ and determined the nuclear excitation mechanisms. By stackingspectra, we deduced the H$_2$ excitation temperature ($1957\pm182$ K) anddominant excitation mechanism (thermal and shock heating combined) from the$\textit{K}$-band emission line sequence. Stacking also produces an "average"spectrum of absorption features and spectral indices from the literature; theCO12 absorption line index vs. $\textit{J-K}$ colour shows a trend of strongernuclear activity producing a weaker CO12 index and a redder (flatter)continuum. The correlations between the radio and the emission-lineluminosities finds a trend with radio power; however, the large scatter in theupper limits shows that the two are not directly coupled and the duty cycles ofSF and AGN activity are not synchronised.

Infrared Spectroscopy of Nearby Radio Active Early-Type Galaxies -- II: Spectral Atlas