We present a near infrared spectroscopic atlas of nearby, bright early-type galaxies with radio emission, containing 163 galaxies observed by the Palomar 200" TripleSpec instrument, measuring the emission line fluxes for H, He, [FeII] and H_2_ and determined the nuclear excitation mechanisms. By stacking spectra, we deduced the H_2_ excitation temperature (1957+/-182K) and dominant excitation mechanism (thermal and shock heating combined) from the K-band emission line sequence. Stacking also produces an 'average' spectrum of absorption features and spectral indices from the literature; the CO^12^ absorption line index vs. J-K colour shows a trend of stronger nuclear activity producing a weaker CO12 index and a redder (flatter) continuum. The correlations between the radio and the emission-line luminosities finds a trend with radio power; however, the large scatter in the upper limits shows that the two are not directly coupled and the duty cycles of SF and AGN activity are not synchronised.
Cone search capability for table J/MNRAS/524/4923/table2 (Observation log)
Cone search capability for table J/MNRAS/524/4923/table7 (Radio catalog)
Cone search capability for table J/MNRAS/524/4923/list (List of fits spectra)
Associated data
