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HD 22736


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Ýlgili Makaleler

Southern subdwarf photometry
UBV photometry and normalized UV excesses are reported for 176 southernmetal-poor stars selected from the objective-prism survey of Bidelmanand MacConnell (1973) as well as 49 other metal-deficient starsidentified in other surveys. Photometry is also presented for 32 otherstars lying near the 225 program stars (although not explicitlyidentified as such in the text, the program stars are apparentlysubdwarfs and subdwarf candidates). Previously determined spectral typesand degrees of line weakening are given for the 225 stars, andmetallicities are estimated on the basis of the degrees of lineweakening. It is noted that 33 F and G stars with extreme meannormalized UV excesses of approximately 0.22 mag have a mean Fe/H valueof -1.4 and probably represent halo subdwarfs, while 82 F and G starswith moderate UV excesses are mostly old disk stars.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Ocak
Sað Açýklýk:03h38m22.24s
Yükselim:-24°00'26.3"
Görünürdeki Parlaklýk:9.659
özdevim Sað Açýklýk:36.9
özdevim Yükselim:-19
B-T magnitude:10.266
V-T magnitude:9.71

Kataloglar ve belirtme:
Özgün isimleri
HD 1989HD 22736
TYCHO-2 2000TYC 6447-297-1
USNO-A2.0USNO-A2 0600-01436000
HIPHIP 16978

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