2003/06/02 by J. Noel-Storr, Jacob Noel-Storr, Stefi A. Baum +8 · 4 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Astrophysics and Star Formation Studies #Emission spectrum #Galaxies: Formation, Evolution, Phenomena #Galaxy #Hubble Deep Field #Hubble Deep Field South #Hubble space telescope #Line (geometry) #Physics #Radio galaxy #Space Telescope Imaging Spectrograph #Spectral line #Spectral resolution #Spectrograph #Spectroscopy #Telescope #astro-ph
paper · pdf · doi:10.1086/377251
119 pages, 26 figures, ApJS Accepted, version with full figures available at http://www.astro.columbia.edu/~jake/pub/fr1datapaper.pdf
arxiv created 2003/06/02 · openalex publication_date 2003/09/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the results of the analysis of a set of medium-resolution spectra, obtained by the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope , of the emission-line gas present in the nuclei of a complete sample of 21 nearby, early-type galaxies with radio jets (the UGC FR-I Sample). For each galaxy nucleus we present spectroscopic data in the region of Hα and the derived kinematics. We find that in 67% of the nuclei the gas appears to be rotating and, with one exception, the cases where rotation is not seen are either face-on or have complex central morphologies. We find that in 62% of the nuclei the fit to the central spectrum is improved by the inclusion of a broad component. The broad components have a mean velocity dispersion of 1349 ± 345 km s -1 and are redshifted from the narrow line components (assuming an origin in Hα) by 486 ± 443 km s -1 .