Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...87...97d&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 87, no. 1, Jan. 1991, p. 97-108. Research supported by CNR a
Astronomy and Astrophysics
Astrophysics
6
Magellanic Clouds, Main Sequence Stars, Open Clusters, Stellar Spectra, M Stars, Spectral Methods, Stellar Evolution
Scientific paper
Spectral types of stars for an extended area (1200 sq arcmin) of the SMC, containing the associations NGC456, NGC460 a, b and NGC465 have been derived here. High-quality UJ and YJ film copies of objective prism plates taken with the 1.2-m UK Schmidt telescope were used. The medium dispersion spectral (830 A/mm) were digitized with a PDS microdensitometer and spectra types of stars were obtained down to about 16.5 mag. A computer interactive method of reduction has been developed, and the spectral types obtained are accurate to 0.3 spectral subtypes. Spectral classification for the low (2440 A/mm) dispersion spectra down to 18.5 mag was carried out visually using a binocular microscope. The frequency distributions of stars in the associations region, after subtracting the field stars, have revealed that only blue main sequence stars are their members.
Dapergolas A.
Kontizas Evangelista
Kontizas Mary
Pasian Fabio
Pucillo Mauro
No associations
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