Navegação Ciências Exatas e da Terra por Assunto "Galaxies: stellar content of"
Resultados 1-6 de 6
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A comparative study of Na I and Ca II infrared lines in stars, star clusters and galaxy nuclei : an alternative to the dwarf-enriched population
(1989) [Artigo de periódico]We make a comparative study of the near-infrared Na I doublet and the Ca II triplet, among sets ofstars, star clusters and galaxy nuclei. In particular, we study the semistellar nucleus of M31. We find evidence that the ... -
Eso 138 g1 : a high excitation seyfert 2 nucleus in a low luminosity early-type galaxy
(1992) [Artigo de periódico]We analyze in detail the spectral properties of the active nucleus ESQ 138 G1. We find that this nucleus lies at the heart of a low luminosity elliptical, making it a particularly interesting and rare object. We have been ... -
Population synthesis in galactic nuclei using a library of star cluster
(1988) [Artigo de periódico]Population syntheses for normal nuclei in E/SO and spiral galaxies are derived using a library of star clusters. This method allows to determine the chemical enrichment and to date successive generations of star formation. ... -
Star formation history and chemical enrichment in the nuclear regions of m31 and its dwarf companions m32 and ngc 205
(1990) [Artigo de periódico]We present a comparative discussion about the stellar population and chemical enrichment in the nuclear regions of M 31 and of its dwarf companions M 32 and NGC 205, from a new set of long slit CCD spectra in the range ... -
Stellar population analysis of the red and blue galaxies in the distant cluster Abell 370
(1990) [Artigo de periódico]In this paper, we apply a population synthesis method based on star cluster integrated spectral properties to members of the distant galaxy cluster Abell 370. Within boxes defined from magnitude vs colour diagrams, we have ... -
Super metal-rich clusters g158 and g177 in m31 : clues on the inner bulge/disc transition
(1992) [Artigo de periódico]The star clusters G 158 and G 177, located at projected distances smaller than 1.5 kpc from the semi-stellar nucleus of M 31, show spectra extreme in absorption-line strengths, comparable to those from the nuclei of giant ...