Inici     Començant     Sobreviure a l'Univers    
Inhabited Sky
    News@Sky     Astro Fotografia     La Col·lecció     Fòrum     Blog New!     FAQ     Premsa     Login  

HD 157415


Contingut

Imatges

Carregar la teva Imatge

DSS Images   Other Images


Articles Relacionats

Classification of Population II Stars in the Vilnius Photometric System. I. Methods
The methods used for classification of Population II stars in theVilnius photometric system are described. An extensive set of standardswith known astrophysical parameters compiled from the literature sourcesis given. These standard stars are classified in the Vilnius photometricsystem using the methods described. The accuracy of classification isevaluated by a comparison of the astrophysical parameters derived fromthe Vilnius photometric system with those estimated from spectroscopicstudies as well as from photometric data in other systems. For dwarfsand subdwarfs, we find a satisfactory agreement between our reddeningsand those estimated in the uvbyscriptstyle beta system. The standarddeviation of [Fe/H] deter mined in the Vilnius system is about 0.2 dex.The absolute magnitude for dwarfs and subdwarfs is estimated with anaccuracy of scriptstyle <=0.5 mag.

The southern Vilnius photometric system. I - Transformation to the standard system
This paper is the first in a series on the extension of the Vilniusphotometric system to the southern hemisphere. Observations of a commonset of 73 stars measured in both hemispheres are described and ananalysis of the differences is given.

Search for stars with intrinsic polarization.
Not Available

Determination of effective temperatures and surface gravities of metal-deficient K-G giants in the Vilnius photometric system
Not Available

Three-dimensional classification of 78 metal-deficient giants in the Vinius photometric system
Not Available

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

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:Ophiucus
Ascensió Recta:17h23m02.13s
Declinació:+00°50'25.9"
Magnitud Aparent:7.755
Distancia:175.439 parsecs
Moviment propi RA:6.1
Moviment propi Dec:13
B-T magnitude:9.337
V-T magnitude:7.886

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 157415
TYCHO-2 2000TYC 401-951-1
USNO-A2.0USNO-A2 0900-09696951
HIPHIP 85060
→ Sol·licitar més catàlegs i designacions de VizieR