In this work we study the spectral properties (3600 - 6800 Å) of the nuclear region of early-type... more In this work we study the spectral properties (3600 - 6800 Å) of the nuclear region of early-type galaxies at low (|b|<25o), intermediate (including surroundings of the Magellanic Clouds) and high (South Polar Cap) Galactic latitudes. We determine the E(B-V) reddening values of the galaxies by matching their continuum distribution with respect to those of reddening-free spectral galaxy templates with
We present Washington photometry for red giant candidates in the open clusters NGC 1817 and NGC 2... more We present Washington photometry for red giant candidates in the open clusters NGC 1817 and NGC 2251. Published radial velocities are used to separate field stars from cluster giants. Effective temperatures and metal abundances are derived for each star. From new UBV and DDO photometric data, we also derive reddening and metal content for NGC 2251. The resulting mean metallicities are [Fe/H] = -0.33 + 0.08 and -0.20 + 0.05 for NGC 1817 and NGC 2251, respectively. We reexamine the overall properties of a sample of 30 clusters in the Galactic anticenter direction with distances, ages and metallicities available. This cluster sample presents no evidence of an abundance gradient perpendicular to the Galactic plane, nor is an age-metallicity relation found. However, a radial abundance gradient of -0.093 dex/kpc is derived over a Galactocentric distance of 14 kpc. This value practically does not change when all clusters with basic parameters known up to this date are considered.
Publications of the Astronomical Society of the Pacific
Fil: Ahumada, Andrea Veronica. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordo... more Fil: Ahumada, Andrea Veronica. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba. Departamento de Astrofisica Estelar; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas; Argentina
In this work we study the spectral properties (3600 - 6800 Å) of the nuclear region of early-type... more In this work we study the spectral properties (3600 - 6800 Å) of the nuclear region of early-type galaxies at low (|b|<25o), intermediate (including surroundings of the Magellanic Clouds) and high (South Polar Cap) Galactic latitudes. We determine the E(B-V) reddening values of the galaxies by matching their continuum distribution with respect to those of reddening-free spectral galaxy templates with
We present Washington photometry for red giant candidates in the open clusters NGC 1817 and NGC 2... more We present Washington photometry for red giant candidates in the open clusters NGC 1817 and NGC 2251. Published radial velocities are used to separate field stars from cluster giants. Effective temperatures and metal abundances are derived for each star. From new UBV and DDO photometric data, we also derive reddening and metal content for NGC 2251. The resulting mean metallicities are [Fe/H] = -0.33 + 0.08 and -0.20 + 0.05 for NGC 1817 and NGC 2251, respectively. We reexamine the overall properties of a sample of 30 clusters in the Galactic anticenter direction with distances, ages and metallicities available. This cluster sample presents no evidence of an abundance gradient perpendicular to the Galactic plane, nor is an age-metallicity relation found. However, a radial abundance gradient of -0.093 dex/kpc is derived over a Galactocentric distance of 14 kpc. This value practically does not change when all clusters with basic parameters known up to this date are considered.
Publications of the Astronomical Society of the Pacific
Fil: Ahumada, Andrea Veronica. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordo... more Fil: Ahumada, Andrea Veronica. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba. Departamento de Astrofisica Estelar; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas; Argentina
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