Computer Science
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ycat..35349031g&link_type=abstract
VizieR On-line Data Catalog: J/A+A/534/A31. Originally published in: 2011A&A...534A..31G
Computer Science
Clusters: Galaxy, Active Gal. Nuclei, Redshifts, Equivalent Widths
Scientific paper
We obtained optical spectra of the nuclei of 283 galaxies using the 1.5m Cassini telescope of Bologna observatory during 14 runs from 2005 to 2011, using the Bologna Faint Object Spectrograph and Camera (BFOSC) attached to the 152cm F/8 Cassini Telescope located in Loiano, belonging to the Observatory of Bologna. Among these galaxies, 177 belong to the Coma supercluster and are added to the 4785 spectra available from SDSS (DR7) to fill-in the incomplete coverage by SDSS of luminous galaxies. We perform a spectral classification of the nuclei of galaxies in this region (with a completeness of 98% at r<=17.77), classifying the nuclear spectra in six classes: three of them (SEY, sAGN, LIN) refer to AGNs and the remaining three (HII, RET, PAS) refer to different stages of starburst activity. We perform this classification as recommended by Cid Fernandes and collaborators using the ratio of λ6584 [NII] to Hα lines and the equivalent width of Hα (WHAN diagnostic), after correcting the last quantity by 1.3Å for underlying absorption.
(1 data file).
Fumagalli Michele
Gavazzi Giuseppe
Savorgnan Giulia
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