Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976pasp...88...89h&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 88, Apr. 1976, p. 89-94.
Astronomy and Astrophysics
Astronomy
23
Early Stars, Interstellar Extinction, Stellar Spectrophotometry, Ubv Spectra, Cepheid Variables, Globular Clusters, Magellanic Clouds, Stellar Luminosity
Scientific paper
Results are reported for uvby-beta photometry of 10 distant early-type stars in the vicinity of the galactic globular cluster 47 Tucanae and the western edge of the Small Magellanic Cloud (SMC). The present study was undertaken to investigate the growth of interstellar reddening at large distances above the galactic plane and in front of the SMC. The derived (B - V) color excess between 1.2 and 4.6 kpc along the line of sight to 47 Tucanae is found to be in excellent agreement with a previous determination for the distance range from 0.20 to 0.52 kpc. It is concluded that: (1) the growth of reddening with increasing distance from the sun in the direction of 47 Tuc and the western edge of the SMC appears to have essentially stopped beyond 200 pc, remaining constant to a distance of the order of 10 kpc; (2) the reddening of 47 Tuc corresponds to a (B - V) color excess of 0.03 magnitude; and (3) the galactic contribution to the reddening of the SMC also corresponds to a (B - V) color excess of approximately 0.03.
Davis Philip A. G.
Hesser James Edward
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