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Title:
The extragalactic distance scale. III - Secondary distance indicators
Authors:
de Vaucouleurs, G.
Affiliation:
AA(Texas, University; McDonald Observatory, Austin, Tex.)
Publication:
Astrophysical Journal, Part 1, vol. 224, Aug. 15, 1978, p. 14-21. (ApJ Homepage)
Publication Date:
08/1978
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTROMETRY, GLOBULAR CLUSTERS, STELLAR LUMINOSITY, SUPERGIANT STARS, VARIABLE STARS, CALIBRATING, COSMOLOGY, DISTANCE MEASURING EQUIPMENT, H II REGIONS, INDICATING INSTRUMENTS, NEBULAE
Comment:
A&AA ID. AAA022.162.035
DOI:
10.1086/156344
Bibliographic Code:
1978ApJ...224...14D

Abstract

Several important secondary extragalactic distance indicators are calibrated. These indicators are: (1) the brightest blue or yellow Population I clusters in late-type galaxies, (2) the brightest globular clusters, (3) the brightest blue supergiants, (4) the brightest red supergiant variables at maximum light, (5) the brightest blue supergiant variables, (6) the diameters of the largest H II loops or rings, and (7) the velocity dispersion of H II regions. Zero points and errors for these secondary indicators are determined on the distance scale defined by six Local Group galaxies whose distances were previously derived from five calibrated primary indicators (novae, Cepheids, RR Lyrae stars, BA supergiants, and eclipsing variables).

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