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

HD 23128


Contenuti

Immagini

Carica la tua immagine

DSS Images   Other Images


Articoli relazionati

UBV (RI)c standard stars in the E- and F-regions and in the Magellanic Clouds - a revised catalogue.
Not Available

UBV(RI)c photometry of some standard sequences in the Harvard F regions and in the Magellanic Clouds
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1988MNRAS.231.1047M&db_key=AST

Standard Stars for VRI Photometry with S25 Response Photocathodes
Not Available

Isolated Stroemgren spheres as a source of galactic H alpha emission
The isolated H alpha emission features reported by Reynolds et al. areidentified with Stroemgren spheres surrounding observed O stars; theroot mean square electron densities and Stroemgren radii are calculatedfrom the observed emission measure and stellar type. The density has anaverage value of 2 per cu cm but increases to 3.3 per cu cm for starswithin 200 pc of the galactic plane. An analysis of the Catalogue ofGalactic O Stars shows that enhanced H alpha emission is observed aroundall known O stars. The diffuse component of H alpha emission is what onewould expect from the line-of-sight overlapping of isolated Stroemgrenspheres surrounding B stars and appears to correlate with features onextinction maps, as derived. There is no compelling reason to suggestany large-scale intercloud ionization from H alpha data alone.

Further observations of magnitude with a coarse grating
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1952MNRAS.112..665W&db_key=AST

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:03h36m12.24s
Declinazione:-73°58'25.7"
Magnitudine apparente:7.627
Distanza:214.592 parsec
Moto proprio RA:28.2
Moto proprio Dec:63.2
B-T magnitude:9.067
V-T magnitude:7.746

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 23128
TYCHO-2 2000TYC 9158-876-1
USNO-A2.0USNO-A2 0150-01544711
HIPHIP 16797
→ Richiesta di ulteriori cataloghi da VizieR