A Search for “Dwarf'' Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies

  title={A Search for “Dwarf'' Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies},
  author={Luis C. Ho and Alexei V. Filippenko and Wallace L. W. Sargent},
  journal={The Astrophysical Journal Supplement Series},
  pages={315 - 390}
We have completed an optical spectroscopic survey of the nuclear regions (r ≲ 200 pc) of a large sample of nearby galaxies. Although the main objectives of the survey are to search for low-luminosity active galactic nuclei and to quantify their luminosity function, the database can be used for a variety of other purposes. This paper presents measurements of the spectroscopic parameters for the 418 emission-line nuclei, along with a compilation of the global properties of all 486 galaxies in the… 
A Search for “Dwarf” Seyfert Nuclei. IV. Nuclei with Broad Hα Emission
We present the results of an optical spectroscopic survey designed to search for low-luminosity “dwarf” Seyfert nuclei in a magnitude-limited (BT ≤ 12.5 mag) sample of 486 bright, northern galaxies.
We present a spectroscopic study of the stellar populations of low-luminosity active galactic nuclei (LLAGNs). Our main goal is to determine whether the stars that live in the innermost (100 pc
Multiwavelength study of the nuclei of a volume-limited sample of galaxies – II. Optical, infrared and radio observations
We present optical and infrared broad-band images, radio maps, and optical spectroscopy for the nuclear region of a sample of nearby galaxies. The galaxies have been drawn from a complete
The Stellar Populations of Low-Luminosity Active Galactic Nuclei. II. Space Telescope Imaging Spectrograph Observations*
We present a study of the stellar populations of low-luminosity active galactic nuclei (LLAGNs). Our goal is to search for spectroscopic signatures of young and intermediate-age stars and to
We have completed a new survey for H I emission for a large, well-defined sample of 154 nearby (z≲ 0.1) galaxies with type 1 (broad-line) active galactic nuclei (AGNs). We make use of the extensive
A New H I Survey of Active Galaxies
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
Near-infrared long-slit spectra of Seyfert galaxies: gas excitation across the central kiloparsec
Context. The excitation of the gas phase of the interstellar medium can be driven by various mechanisms. In galaxies with an active nucleus, such as Seyfert galaxies, both radiative and mechanical
The Survey of Nearby Nuclei with the Space Telescope Imaging Spectrograph: Emission-Line Nuclei at Hubble Space Telescope Resolution*
We present results from a program of optical spectroscopy for 23 nearby galaxies with emission-line nuclei. This investigation takes advantage of the spatial resolution of the Hubble Space Telescope
Nuclear versus integrated spectroscopy of galaxies in the Herschel Reference Survey
Context. The determination of the relative frequency of active galactic nuclei (AGN) versus other spectral classes, for example, HII region-like (HII), transition objects (TRAN), passive (PAS), and
Stellar and dust properties of local elliptical galaxies: clues to the onset of nuclear activity
Aims. We study the stellar and dust properties of a well-defined sample of local elliptical galaxies to investigate the relationship between host galaxy properties and nuclear activity. Methods. We


A Search for “Dwarf'' Seyfert Nuclei. V. Demographics of Nuclear Activity in Nearby Galaxies
We use the sample of emission-line nuclei derived from a recently completed optical spectroscopic survey of nearby galaxies to quantify the incidence of local (z ≈ 0) nuclear activity. Particular
Spectroscopy of dwarf elliptical galaxies in the fornax cluster
We present the results of spectroscopic observations of 10 nucleated dwarf elliptical galaxies (dE's) in the Fornax cluster. The blue spectra of Fornax dE galaxies indicate a wide range of
Virial and Jet-induced Velocities in Seyfert Galaxies. I. A Compilation of Narrow Line Region and Host Galaxy Properties
Data for a sample of 140 Seyfert galaxies have been compiled with the aim of studying the dependence of nuclear gas velocities on properties of the host galaxy and properties of the nuclear activity.
The optical spectra of narrow-line X-ray galaxies
Spectrophotometric results of narrow--emission-line galaxies known to be X-ray sources are discussed. In many respects, the spectra of these galaxies are similar to Seyfert type 2 and other
The authors present calculations of the relative strengths of Lα, Hα, Hβ, Hγ, and Pα for low-density gas clouds photoionized by a continuum such as might be found in active galactic nuclei. They
Spectrophotometry of Seyfert 2 galaxies and narrow-line radio galaxies
Results are reported for a spectrophotometric survey of several Seyfert 2 galaxies, intermediate Seyferts, and narrow-line radio galaxies. The emission-line spectra of the galaxies are analyzed,
Detailed study of the emission lines in the Seyfert 1 nucleus of M81
Optical spectra of M81 having moderate resolution and exceptionally high SNR ratios are reported. The observations and reductions are presented, the subtraction of the underlying stellar continuum is
Interstellar matter in early-type galaxies. I. The catalog
A catalog is given of the currently available measurements of interstellar matter in the 467 early-type galaxies listed in the second edition of the Revised Shapley-Ames Catalog of Bright Galaxies.
IRAS observations of an optically selected sample of interacting galaxies
IRAS observations of a large, morphologically selected sample of strongly interacting disk-type galaxies have demonstrated that galaxy-galaxy collisions can lead to enhanced infrared emission, but
The chemistry of galaxies. I. The nature of giant extragalactic H II regions.
Spectrophotometric observations of 99 H II regions in 20 spiral and irregular galaxies are presented and discussed. The emission properties are shown to form a one-parameter sequence. The vast