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Information × Registration Number 0215U001007, 0109U006853 , R & D reports Title The study of the massive stellar evolution manifestation in emission-line galaxies from the Sloan Digital Sky Survey popup.stage_title Head Izotov Yu.I., Registration Date 12-01-2015 Organization Main Astronomical Observatory popup.description2 The global parameters, such as metallicities, luminosities, and stellar masses for a large sample of 15000 galaxies from the Sloan Digital Sky Survey are derived. These data were supplemented by the data from the space telescopes GALEX, Spitzer, WISE, and Herschel. The chemical composition of the interstellar medium (ISM) is studied with the use of observations in the optical, near- and mid-infrared ranges. Several new low-metallicity dwarf galaxies are discovered. The ISM properties of these galaxies are similar to those in high-redshift galaxies. This common feature opens an opportunity to study physical conditions in galaxies on the stage of their formation. The luminosity-metallicity and mass-metallicity relations are constructed for the galaxies with active star formation. For the first time the magnesium abundance is derived in the large sample of 64 emission-line galaxies. A new method of the oxygen abundance determination in HII regions with any metallicity is proposed. The oxygen and nitrogen abundance distributions are found in discs of 130 nearby spiral galaxies. The relation between oxygen abundance distribution and surface brightness profile in the infrared band W1 is determined. The variations of oxygen and nitrogen abundances with the redshift are studied for the galaxies with different masses. The sample of SDSS galaxies with double-peak emission lines is analysed. Product Description popup.authors Ізотов Юрій Іванович Вовк К.Б. Гусєва Наталія Григорівна Зинченко І.А. Никитюк Тетяна Вікторівна Пілюгін Леонід Степанович Якобчук Тарас Миколайович popup.nrat_date 2020-04-02 Close