Inici     Sobreviure a l'Univers    
Services
    Per que Habitar     Millors Contribuents     Astro Fotografia     La Col·lecció     Fòrum     Blog New!     FAQ     Login  
→ Adopt this star  

HD 218631


Contingut

Imatges

Carregar la teva Imatge

DSS Images   Other Images


Articles Relacionats

Interstellar polarization from observations of A and F stars in high and intermediate galactic latitudes, and from stars in the Mathewson and Ford polarization catalogue
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1986A&AS...64..487K&db_key=AST

Uvby-Beta Photometry of Equatorial and Southern Bright Stars - Part Two
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980A&AS...42..311H&db_key=AST

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.

Enviar un nou article


Enllaços Relacionats

  • - No s'ha trobat enllaços -
Enviar un nou enllaç


Membre dels grups següents:

Dades d'Observació i Astrometria

Constel·lació:Tucana
Ascensió Recta:23h10m27.09s
Declinació:-60°33'51.8"
Magnitud Aparent:6.717
Distancia:92.678 parsecs
Moviment propi RA:49.5
Moviment propi Dec:-24.9
B-T magnitude:6.991
V-T magnitude:6.74

Catàlegs i designacions:
Noms Propis
HD 1989HD 218631
TYCHO-2 2000TYC 9125-333-1
USNO-A2.0USNO-A2 0225-31754657
HIPHIP 114428
→ Sol·licitar més catàlegs i designacions de VizieR