WIKISKY.ORG

Sopravvivere Nell'Universo

HD 143703

Contenuti

Immagini
Articoli relazionati
Link relazionati
Gruppi

Immagini

Carica la tua immagine

DSS Images Other Images

Articoli relazionati

The λ Bootis phenomenon: interaction between a star and a diffuse interstellar cloud The λ Bootis stars, a group of late B- to early F-type PopulationI stars, have surface abundances that resemble the general metaldepletion pattern found in the interstellar medium. Inspired by therecent result that the fundamental parameters of these peculiar starsdiffer in no respect from those of a comparison sample of normal stars,the hypothesis of an interaction between a star and a diffuseinterstellar cloud is considered as a possible explanation of thepeculiar abundance pattern. It is found that such a scenario is able toexplain the selective accretion of interstellar gas depleted incondensable elements as well as the spectral range of the λBootis phenomenon.
Photoelectric photometry of stars in the Vilnius system in Kapteyn areas SA 2, 4 and 6 Photoelectric photometry in the Vilnius system of 114 standard stars inKapteyn areas SA 2, 4, and 6 is presented with mean square errors of thearithmetic mean +/- 0.005 mag. Photometrically determined spectral typesand luminosity classes of the stars are also presented.
Photoelectric Photometry of Stars in Kapteyn Area SA:6 in the Vilnius Photometric System Not Available

Sottometti un nuovo articolo

Link relazionati

- Nessun link trovato -

Sottometti un nuovo link

Membro dei seguenti gruppi:

Osservazione e dati astrometrici

Costellazione:	Orsa Minore
Ascensione retta:	15^h54^m23.13^s
Declinazione:	+75Â°45'18.1"
Magnitudine apparente:	8.883
Distanza:	434.783 parsec
Moto proprio RA:	-21.2
Moto proprio Dec:	36.1
B-T magnitude:	9.091
V-T magnitude:	8.901

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 143703
TYCHO-2 2000	TYC 4560-1414-1
USNO-A2.0	USNO-A2 1650-01817885
HIP	HIP 77885

→ Richiesta di ulteriori cataloghi da VizieR