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

HD 169313


Contenuti

Immagini

Carica la tua immagine

DSS Images   Other Images


Articoli relazionati

An Einstein Observatory SAO-based catalog of B-type stars
About 4000 X-ray images obtained with the Einstein Observatory are usedto measure the 0.16-4.0 keV emission from 1545 B-type SAO stars fallingin the about 10 percent of the sky surveyed with the IPC. Seventy-fourdetected X-ray sources with B-type stars are identified, and it isestimated that no more than 15 can be misidentified. Upper limits to theX-ray emission of the remaining stars are presented. In addition tosummarizing the X-ray measurements and giving other relevant opticaldata, the present extensive catalog discusses the reduction process andanalyzes selection effects associated with both SAO catalog completenessand IPC target selection procedures. It is concluded that X-rayemission, at the level of Lx not less than 10 exp 30 ergs/s, is quitecommon in B stars of early spectral types (B0-B3), regardless ofluminosity class, but that emission, at the same level, becomes lesscommon, or nonexistent, in later B-type stars.

Light variations of extreme galactic B- and A supergiants
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1977A&A....57..361S&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:Scudo
Ascensione retta:18h24m40.00s
Declinazione:-12°40'30.4"
Magnitudine apparente:9.044
Moto proprio RA:7.5
Moto proprio Dec:-5.7
B-T magnitude:9.366
V-T magnitude:9.071

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 169313
TYCHO-2 2000TYC 5698-3538-1
USNO-A2.0USNO-A2 0750-13100031
HIPHIP 90234

→ Richiesta di ulteriori cataloghi da VizieR