Poчetna     Да почнемо     To Survive in the Universe    
Inhabited Sky
    News@Sky     Астро Фотографије     Колекција     Форум     Blog New!     FAQ(Често постављана питања     Штампа     Улогуј се  

HD 8000


Садржај

Слике

Уплоадјуј своје слике

DSS Images   Other Images


Везани чланци

Metal-Deficient Giants in the Galactic Field - Catalogue and Some Physical Parameters
Not Available

A kinematic and abundance survey at the galactic poles
The DDO intermediate band system is used to obtain detailed informationabout abundance gradients and velocity dispersions in the galaxy, withan emphasis on the properties of halo stars in the range of from 1 to 5kpc. The DDO abundance index is calibrated agianst (Fe/H) for metal-poorstars, with a resulting gradient of about -0.2 per kpc. However, whenthe sample is divided into two subsamples with (Fe/H) less than -0.5 andequal to or greater than -0.5, the gradients are -0.14 and 0.00,respectively. DDO observations of about 1000 stars, mostly G5-K5 giants,show that the velocity dispersion increases both with decrease inmetallicity and increase in z distance. The abundances found for high-zstars are similar to the A-star results of Rodgers (1971) in that abouthalf the K giants above 1 kpc appear to have solar abundances.

Stellar population samples at the galactic poles. III - UBVRI observations of proper motion stars near the south pole and the luminosity laws for the halo and old disk populations
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1976ApJS...30..351E&db_key=AST

Додај нови чланак


Линкови у сродству са темом

  • - Нема линкова -
Додај нови линк


Чланови следећих група \:

Посматрања и Астрометриски подаци

Сазвежђа:Вајар
Ректацензија:01h18m56.44s
Deклинација:-29°57'32.9"
Apparent магнитуда:9.331
Proper motion RA:100.3
Proper motion Dec:68.6
B-T magnitude:10.206
V-T magnitude:9.404

Каталог и designations:
Proper имена   (Edit)
HD 1989HD 8000
TYCHO-2 2000TYC 6427-931-1
USNO-A2.0USNO-A2 0600-00506374
HIPHIP 6151
→ Захтевај још каталога од VizieR