Home     Per cominciare     Sopravvivere Nell'Universo    
Inhabited Sky
    News@Sky     Astro Foto     La collezione     Forum     Blog New!     FAQ     Stampa     Login  

HD 9963


Contenuti

Immagini

Carica la tua immagine

DSS Images   Other Images


Articoli relazionati

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.

Sottometti un nuovo articolo


Link relazionati

  • - Nessun link trovato -
Sottometti un nuovo link


Membro dei seguenti gruppi:


Osservazione e dati astrometrici

Costellazione:Idro
Ascensione retta:01h35m07.35s
Declinazione:-67°08'10.4"
Magnitudine apparente:8.212
Distanza:131.406 parsec
Moto proprio RA:-26.8
Moto proprio Dec:-0.7
B-T magnitude:8.578
V-T magnitude:8.243

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 9963
TYCHO-2 2000TYC 8856-630-1
USNO-A2.0USNO-A2 0225-00412053
HIPHIP 7383

→ Richiesta di ulteriori cataloghi da VizieR