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

HD 178060


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.

Sottometti un nuovo articolo


Link relazionati

  • - Nessun link trovato -
Sottometti un nuovo link


Membro dei seguenti gruppi:


Osservazione e dati astrometrici

Costellazione:Lira
Ascensione retta:19h05m17.45s
Declinazione:+41°25'18.7"
Magnitudine apparente:8.924
Distanza:769.231 parsec
Moto proprio RA:-0.2
Moto proprio Dec:-2.2
B-T magnitude:8.952
V-T magnitude:8.927

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 178060
TYCHO-2 2000TYC 3128-2211-1
USNO-A2.0USNO-A2 1275-10743306
HIPHIP 93741

→ Richiesta di ulteriori cataloghi da VizieR