Study and Classification of SDSS Spectra for Byurakan–Iras Galaxies

A. Mickaelian (1) , G. Harutyunyan (2) , Alain Sarkissian (3)

1 BAO - V.A. Ambartsumian Byurakan Astrophysical Observatory
2 AIP - Leibniz-Institut für Astrophysik Potsdam
3 PLANETO - LATMOS

The sample of Byurakan–IRAS galaxies (BIG) has been created based on optical identifications of IRAS Point Source Catalog (PSC) at high galactic latitudes. As a result, 1178 galaxies have been identified. 172 of them have been observed spectroscopically with Byurakan Astrophysical Observatory (BAO, Armenia) 2.6 m, Special Astrophysical Observatory (SAO, Russia) 6m and Observatoire de Haute Provence (OHP, France) 1.93 m telescopes. Later on, spectra were obtained for more 83 BIG objects in Sloan Digital Sky Survey (SDSS). We have extracted and studied these spectra, classified them and measured spectral features. Diagnostic diagrams have been built to distinguish starbursts (SB), LINERs and Seyfert galaxies. Cross-correlations weremade for these objects with multiwavelength (MW) catalogues and their physical properties were studied. Among these 83 objects, 55 HII, 8 Seyfert galaxies, 2 LINERs, 4 other AGN, 6 composite spectrum objects, and 8 other emission-line galaxies have been revealed. Three of these objects are Ultra-Luminous InfraRed Galaxies (ULIRG).

Mots clés: infrared galaxies; methods observational; astronomical databases; galaxies active; galaxies starburst

Domaines: Astrophysique galactique [astro-ph.GA]

A. Mickaelian, G. Harutyunyan, Alain Sarkissian. Study and Classification of SDSS Spectra for Byurakan–Iras Galaxies. Astronomy Letters / Pis'ma v Astronomicheskii Zhurnal, 2018, 44 (6), pp.351 - 361. ⟨10.1134/S1063773718060051⟩. ⟨insu-01834611⟩