A search for stars of very low metal abundance. III. UBV photometry of metal-weak candidates

John E. Norris; Sean G. Ryan; Timothy C. Beers

doi:10.1086/313248

A search for stars of very low metal abundance. III. UBV photometry of metal-weak candidates

John E. Norris, Sean G. Ryan, Timothy C. Beers

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Abstract

We present photoelectric UBV photometry for some 2600 metal-poor dwarf and giant candidates selected from the HK objective-prism/interference-filter survey of Beers and colleagues. These data provide the basis for our ultraviolet-excess selection of objects having [Fe/H] ≲ -2.0 for a spectroscopic investigation in which we have obtained ∼ 1-2 Å resolution spectra of some 1000 objects. The present material may also prove useful for investigations of the metal-poor dwarfs and giants more metal-rich than [Fe/H] = -2.0, as well as the misclassified subdwarf O and B stars, white dwarfs, blue metal-poor stars, and field horizontal-branch stars which appear in the catalog.

Original language	English
Pages (from-to)	639-686
Number of pages	48
Journal	Astrophysical Journal, Supplement Series
Volume	123
Issue number	2
DOIs	https://doi.org/10.1086/313248
Publication status	Published - Aug 1999

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title = "A search for stars of very low metal abundance. III. UBV photometry of metal-weak candidates",

abstract = "We present photoelectric UBV photometry for some 2600 metal-poor dwarf and giant candidates selected from the HK objective-prism/interference-filter survey of Beers and colleagues. These data provide the basis for our ultraviolet-excess selection of objects having [Fe/H] ≲ -2.0 for a spectroscopic investigation in which we have obtained ∼ 1-2 {\AA} resolution spectra of some 1000 objects. The present material may also prove useful for investigations of the metal-poor dwarfs and giants more metal-rich than [Fe/H] = -2.0, as well as the misclassified subdwarf O and B stars, white dwarfs, blue metal-poor stars, and field horizontal-branch stars which appear in the catalog.",

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author = "Norris, {John E.} and Ryan, {Sean G.} and Beers, {Timothy C.}",

year = "1999",

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journal = "Astrophysical Journal, Supplement Series",

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T1 - A search for stars of very low metal abundance. III. UBV photometry of metal-weak candidates

AU - Norris, John E.

AU - Ryan, Sean G.

AU - Beers, Timothy C.

PY - 1999/8

Y1 - 1999/8

N2 - We present photoelectric UBV photometry for some 2600 metal-poor dwarf and giant candidates selected from the HK objective-prism/interference-filter survey of Beers and colleagues. These data provide the basis for our ultraviolet-excess selection of objects having [Fe/H] ≲ -2.0 for a spectroscopic investigation in which we have obtained ∼ 1-2 Å resolution spectra of some 1000 objects. The present material may also prove useful for investigations of the metal-poor dwarfs and giants more metal-rich than [Fe/H] = -2.0, as well as the misclassified subdwarf O and B stars, white dwarfs, blue metal-poor stars, and field horizontal-branch stars which appear in the catalog.

AB - We present photoelectric UBV photometry for some 2600 metal-poor dwarf and giant candidates selected from the HK objective-prism/interference-filter survey of Beers and colleagues. These data provide the basis for our ultraviolet-excess selection of objects having [Fe/H] ≲ -2.0 for a spectroscopic investigation in which we have obtained ∼ 1-2 Å resolution spectra of some 1000 objects. The present material may also prove useful for investigations of the metal-poor dwarfs and giants more metal-rich than [Fe/H] = -2.0, as well as the misclassified subdwarf O and B stars, white dwarfs, blue metal-poor stars, and field horizontal-branch stars which appear in the catalog.

KW - Catalogs

KW - Stars: abundances

KW - Stars: population II

KW - Surveys

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DO - 10.1086/313248

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SN - 0067-0049

VL - 123

SP - 639

EP - 686

JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

IS - 2

ER -

A search for stars of very low metal abundance. III. UBV photometry of metal-weak candidates

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