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The Role of Starbursts in the Evolution of Galaxies
(Astrophysics and Space Science, 2010-11-30)We have determined, for the first time, the nitrogen-to-oxygen abundance ratio (N/O) for a large sample of starburst nucleus galaxies (SBNGs) and compared it to the values observed in normal spiral galaxies. The N/O ratios ... -
IRFM temperature calibrations for the Vilnius, Geneva, RI(c) and DDO photometric systems
(Astronomy & Astrophysics, 2010-10-07)We have used the infrared flux method (IRFM) temperatures of a large sample of late type dwarfs given by Alonso et al. (1996a) to calibrate empirically the relations Teff = f(colour, [Fe/H]) for the Vilnius, Geneva, RI(C) ... -
The abundance of nitrogen in starburst nucleus galaxies
(Astronomy and Astrophysics, 2010-10-07)We show that the excess of nitrogen emission observed in a large sample of StarburstNucleusGalaxies (SBNGs) can only be explained at a givenmetallicity by an overabundance of nitrogen with respect to normal Hii regions in ... -
IRFM Teff calibrations for cluster and field giants in the Vilnius, Geneva, RI(c) and DDO photometric systems
(Astronomy & Astrophysics, 2010-10-05)Based on a large sample of disk and halo giant stars for which accurate effective temperatures derived through the InfraRed Flux Method (IRFM) exist, a calibration of the temperature scale in the Vilnius, Geneva, RI(C) and ... -
Gemini-Phoenix infrared high-resolution abundance analysis of five giants in the bulge globular cluster NGC 6553
(Astronomy & Astrophysics, 2010-10-05)A detailed abundance analysis of 5 giants of the metal-rich bulge globular cluster NGC 6553 was carried out using high resolution infrared spectra in the H band, obtained at the Gemini-South 8m telescope. JK photometry ...
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