NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-11-19 T12:17:53 PST
Help | Comment | NED Home

For refcode 2013A&A...558A..68G:
Retrieve 390 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2013A&A...558A..68G Red-channel (6000-8000 A) nuclear spectra of 376 local galaxies Gavazzi, Giuseppe; Consolandi, Guido; Dotti, Massimo; Fossati, Matteo; Savorgnan, Giulia; Gualandi, Roberto; Bruni, Ivan Abstract. We obtained long-slit optical spectra of the nuclear regions of 376 galaxies in the local Universe using the 1.5 m Cassini telescope of Bologna Observatory. Of these spectra, 164 were either never taken before by the Sloan Digital Sky Survey (SDSS), or given by the Nasa Extragalactic Database (NED). With these new spectra, we contribute investigating the occurrence of active galactic nuclei (AGNs). Nevertheless, we stress that the present sample is by no means complete, thus, it cannot be used to perform any demographic study. Following the method used in a previous work, we classify the nuclear spectra using a six bin scheme: SEY (Seyfert), sAGN (strong AGN), and wAGN (weak AGN) represent active galactic nuclei of different levels of activity; HII accounts for star-forming nuclei; RET (retired) and PAS (passive) refer to nuclei with poor or no star-formation activity. The spectral classification is performed using the ratio of lambda 6584 [NII] to Halpha lines and the equivalent width (EW) of Halpha versus [NII] /Halpha (WHAN diagnostic introduced by Cid Fernandes and collaborators) after correcting Halpha for underlying absorption. The obtained spectra are made available in machine readable format via the Strasbourg Astronomical Data Center (CDS) and NED. Full Tables 3 and 4 and Fig. 4 (in FITS format) are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/558/A68 Key words: galaxies: active, galaxies: nuclei, galaxies: Seyfert
Retrieve 390 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home