Infrared spectroscopy of nearby radio active elliptical galaxies
Jeremy Mould, Tristan Reynolds, Tony Readhead, David Floyd, Buell, Jannuzi, Garret Cotter, Laura Ferrarese, Keith Matthews, David Atlee, and, Michael Brown
TL;DR
This study surveys the infrared spectra of nearby radio-active elliptical galaxies to analyze their nuclear gas, revealing emission lines and exploring correlations with radio power and black hole mass.
Contribution
It provides the first infrared spectral survey of a complete sample of radio-active elliptical galaxies, offering community access to the spectra and insights into nuclear gas properties.
Findings
20% of spectra show infrared emission lines
Detection of Paschen, Brackett gamma, and [FeII] lines
Infrared emission lines correlate with radio power and black hole mass
Abstract
In preparation for a study of their circumnuclear gas we have surveyed 60% of a complete sample of elliptical galaxies within 75 Mpc that are radiosources. Some 20% of our nuclear spectra have infrared emission lines, mostly Paschen lines, Brackett gamma and [FeII]. We consider the influence of radio power and black hole mass in relation to the spectra. Access to the spectra is provided as a community resource.
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