H-R Diagrams Based on the HD Stars in the Michigan Spectral Catalogue and theHipparcosCatalog

Autor:	James R. Sowell, M. L. Trippe, N. Houk, Saida M. Caballero-Nieves
Rok vydání:	2007
Předmět:	Physics symbols.namesake Stars Space and Planetary Science Homogeneous Hertzsprung–Russell diagram symbols Astronomy Astronomy and Astrophysics Astrophysics Schmidt camera Parallax Declination
Zdroj:	The Astronomical Journal. 134:1089-1102
ISSN:	1538-3881 0004-6256
DOI:	10.1086/520060
Popis:	The systematic, spectroscopic two-dimensional classification of the HD stars by N. H. is approximately three-quarters complete. Over 161,000 stars have been classified visually using 10° objective-prism plates (2 A resolution) taken at CTIO with the Michigan Curtis Schmidt telescope. The published portion of this large, homogeneous database, taken from volumes 1-5 of the Michigan Spectral Catalogue (declination -90° to +5°), has been used to create an H-R diagram. The Hipparcos parallax measurements provide a large homogenous database, too. H-R diagrams of the HD stars found in both catalogs are produced for distances to 20, 50, 100, and 200 pc.
Databáze:	OpenAIRE
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