Study and Classification of SDSS Spectra for Byurakan–Iras Galaxies

• Published in: Astronomy letters Vol. 44; no. 6; pp. 351 - 361
• Main Authors: Mickaelian, A. M., Harutyunyan, G. S., Sarkissian, A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-06-2018; Springer Nature B.V; MAIK Nauka/Interperiodica
• Subjects: Active galactic nuclei; Astronomy; Astrophysical observatories; Astrophysics; Astrophysics and Astroparticles; Diagnostic systems; Emission lines; Feature extraction; Galactic Astrophysics; Galaxies; Linings; Object recognition; Observations and Techniques; Observatories; Physical properties; Physics; Physics and Astronomy; Sciences of the Universe; Seyfert galaxies; Sky surveys (astronomy); Spectra; Telescopes; galaxies—methods; observational—astronomical databases; starburst; infrared; active—galaxies; miscellaneous—galaxies; galaxies active; methods observational; galaxies starburst; astronomical databases; infrared galaxies
• ISSN: 1063-7737; 1562-6873
• DOI: 10.1134/S1063773718060051

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).