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Title:
A New H I Survey of Active Galaxies
Authors:
Ho, Luis C.; Darling, Jeremy; Greene, Jenny E.
Affiliation:
AA(The Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101.), AB(Center for Astrophysics and Space Astronomy, Department of Astrophysical and Planetary Sciences, University of Colorado, 389 UCB, Boulder, CO 80309-0389.), AC(Princeton Observatory, Peyton Hall, Princeton University, Princeton, NJ 08544-1001.; Hubble Fellow and Carnegie-Princeton Fellow.)
Publication:
The Astrophysical Journal Supplement Series, Volume 177, Issue 1, pp. 103-130. (ApJS Homepage)
Publication Date:
07/2008
Origin:
UCP
ApJ Keywords:
Galaxies: Active, Galaxies: Bulges, Galaxies: ISM, Galaxies: Kinematics and Dynamics, Galaxies: Nuclei, Galaxies: Seyfert
DOI:
10.1086/588217
Bibliographic Code:
2008ApJS..177..103H

Abstract

We have conducted a new Arecibo survey for H I emission for 113 galaxies with broad-line (type 1) active galactic nuclei (AGNs) out to recession velocities as high as ~35,000 km s-1. The primary aim of the study is to obtain sensitive H I spectra for a well-defined, uniformly selected sample of active galaxies that have estimates of their black hole masses in order to investigate correlations between H I properties and the characteristics of the AGNs. H I emission was detected in 66 out of the 101 (65%) objects with spectra uncorrupted by radio frequency interference, among which 45 (68%) have line profiles with adequate signal-to-noise ratio and sufficiently reliable inclination corrections to yield robust deprojected rotational velocities. This paper presents the basic survey products, including an atlas of H I spectra, measurements of H I flux, line width, profile asymmetry, optical images, optical spectroscopic parameters, as well as a summary of a number of derived properties pertaining to the host galaxies. To enlarge our primary sample, we also assemble all previously published H I measurements of type 1 AGNs for which we can estimate black hole masses, which total an additional 53 objects. The final comprehensive compilation of 154 broad-line active galaxies, by far the largest sample ever studied, forms the basis of our companion paper, which uses the H I database to explore a number of properties of the AGN host galaxies.

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