A search for 'dwarf' Seyfert nuclei. 2: an optical spectral atlas of the nuclei of nearby galaxies

Details A search for 'dwarf' Seyfert nuclei. 2: an optical spectral atlas of the nuclei of nearby galaxies A search for 'dwarf' Seyfert nuclei. 2: an optical spectral atlas of the nuclei of nearby galaxies

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apjs...98..477h&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 98, no. 2, p. 477-593

Astronomy and Astrophysics

Astronomy

319

Astronomical Catalogs, Galactic Nuclei, Seyfert Galaxies, Sky Surveys (Astronomy), Star Formation, Starburst Galaxies, Wolf-Rayet Stars, Spectrographs, Stellar Magnitude, Velocity Distribution

Scientific paper

We present an optical spectral atlas of the nuclear region (generally 2 sec x 4 sec, or r approximately less than 200 pc) of a magnitude-limited survey of 486 nearby galaxies having BT less than or = 12.5 mag and delta greater than 0 deg. The double spectrograph on the Hale 5 m telescope yielded simultaneous spectral coverage of approximately 4230-5110 A and approximately 6210-6860 A, with a spectral resolution of approximately 4 A in the blue half and approximately 2.5 A in the red half. This large, statistically significant survey contains uniformly observed and calibrated moderate-dispersion spectra of exceptionally high quality. The data presented in this paper will be used for various systematic studies of the physical properties of the nuclei of nearby galaxies, with special emphasis on searching for low-luminosity active galactic nuclei, or 'dwarf' Seyferts. Our survey led to the discovery of four relatively obvious but previously uncataloged Seyfert galaxies (NGC 3735, 492, 4639, and 6951), and many more galactic nuclei showing evidence for Seyfert activity. We have also identified numerous low-ionization nuclear emission-line regions (LINERs), some of which may be powered by nonstellar processes. Of the many 'starburst' nuclei in our sample, several exhibit the spectral features of Wolf-Rayet stars.

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