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HD 47567


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The chemical evolution of the solar neighborhood. I - A bias-free reduction technique and data sample
The possible ways of measuring the age-metallicity relation for thegalactic disk in the neighborhood of the sun are discussed. It is shownthat the use of a field star sample chosen on the basis of effectivetemperature introduces a bias which results in a monotonic increase inthe metal abundance of the disk with time. However, if theage-metallicity relation for the disk can be shown to satisfy certaincriteria, the bias introduced in such a sample can be neglected: thegalactic disk apparently satisfies the criteria. It is concluded that asample analyzed through the use of uvby and H(beta) photometry inconjunction with a self-consistent set of theoretical isochronesprovides the least biased, most accurate estimate of the age-metallicityrelation for the disk.

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Dades d'Observació i Astrometria

Constel·lació:Pictor
Ascensió Recta:06h35m09.21s
Declinació:-61°10'23.7"
Magnitud Aparent:7.425
Distancia:230.415 parsecs
Moviment propi RA:-9.6
Moviment propi Dec:28.3
B-T magnitude:7.676
V-T magnitude:7.446

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 47567
TYCHO-2 2000TYC 8895-963-1
USNO-A2.0USNO-A2 0225-03117331
HIPHIP 31430

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