SIMBAD references

2003ApJS..148..419N - Astrophys. J., Suppl. Ser., 148, 419-472 (2003/October-0)

Space telescope imaging spectrograph spectroscopy of the emission-line gas in the nuclei of nearby FR-I galaxies.

NOEL-STORR J., BAUM S.A., VERDOES KLEIJN G., VAN DER MAREL R.P., O'DEA C.P., DE ZEEUW P.T. and CAROLLO C.M.

Abstract (from CDS):

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 and are redshifted from the narrow line components (assuming an origin in Hα) by 486±443 km/s.


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Journal keyword(s): Galaxies: Active - Galaxies: Elliptical and Lenticular, cD - Galaxies: Kinematics and Dynamics - Galaxies: Nuclei

Simbad objects: 21

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