The NGC 1399 globular cluster system

Details The NGC 1399 globular cluster system The NGC 1399 globular cluster system

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989rmxaa..19...83g&link_type=abstract

(Chile, una ventana de la astronomia optica; Coloquio, Santiago, Chile, Jan. 11-13, 1989) Revista Mexicana de Astronomia y Astro

Astronomy and Astrophysics

Astronomy

Abundance, Astrometry, Astronomical Photometry, Charge Coupled Devices, Color-Magnitude Diagram, Globular Clusters, Group Velocity, Hubble Constant

Scientific paper

Integrated photometry of the globular cluster system NGC 1399 was obtained with the CTIO 4-m prime focus CCD. The observations include about 2000 clusters and extend to V = 24.5. Corrections for incompleteness, background, and systematic photometric error are made and the luminosity function is derived. The luminosity function shows a turnover at T(1) = 23.0 + or - 0.15, or V = 23.45 + or - 0.16. The results are used to study the distance of the system. Also, abundances for about 100 clusters are derived from the system's integrated, reddening-free abundance index. The clusters show a mean metallicity of Fe/H = -1.0, with a broad, flattened abundance distribution.

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