File:Chandra image of Cygnus X-1.jpg

Da Wikimedia Commons, l'archivio di file multimediali liberi
Vai alla navigazione Vai alla ricerca

File originale ‎(2 400 × 2 400 pixel, dimensione del file: 3,72 MB, tipo MIME: image/jpeg)

Didascalie

Didascalie

Aggiungi una brevissima spiegazione di ciò che questo file rappresenta

Dettagli[modifica]

Descrizione
English: Since its discovery in 1964, Cygnus X-1 has been one of the most intensively studied cosmic X-ray sources. About a decade after its discovery, Cygnus X-1 secured a place in the history of astronomy when a combination of X-ray and optical observations led to the conclusion that it was a black hole, the first such identification.

The Cygnus X-1 system consists of a black hole with a mass about 10 times that of the Sun in a close orbit with a blue supergiant star with a mass of about 20 Suns. Gas flowing away from the supergiant in a fast stellar wind is focused by the black hole, and some of this gas forms a disk that spirals into the black hole. The gravitational energy release by this infalling gas powers the X-ray emission from Cygnus X-1.

Although more than a thousand scientific articles have been published on Cygnus X-1, its status as a bright and nearby black hole continues to attract the interest of scientists seeking to understand the nature of black holes and how they affect their environment. Observations with Chandra and ESA's XMM-Newton are especially valuable for studying the property of the stellar wind that fuels Cygnus X-1, and determining its rate of spin.

This latter research has revealed that Cygnus X-1 is spinning very slowly. This puzzling result could indicate that Cygnus X-1 may have formed in an unusual type of supernova that somehow prevented the newly formed black hole from acquiring as much spin as other stellar black holes.
Data
Fonte http://www.nasa.gov/images/content/381549main_cygX1_final_665.jpg linked from http://www.nasa.gov/mission_pages/chandra/multimedia/photo09-065.html
Autore NASA's Chandra X-ray Observatory; Credits: NASA/CXC

Licenza[modifica]

Public domain Questo file è nel pubblico dominio perché creato dalla NASA. La politica sul copyright della NASA afferma che «il materiale della NASA non è protetto da copyright a meno che non sia specificato altrimenti». (NASA copyright policy e JPL Image Use Policy).
Attenzione:

Cronologia del file

Fare clic su un gruppo data/ora per vedere il file come si presentava nel momento indicato.

Data/OraMiniaturaDimensioniUtenteCommento
attuale19:06, 13 ago 2015Miniatura della versione delle 19:06, 13 ago 20152 400 × 2 400 (3,72 MB)Pine (discussione | contributi)Larger version. Source http://chandra.harvard.edu/photo/2011/cygx1/more.html, credit NASA/CXC
16:02, 11 set 2009Miniatura della versione delle 16:02, 11 set 2009665 × 665 (61 KB)Marshallsumter (discussione | contributi){{Information |Description={{en|1=Chandra image of Cygnus X-1.}} |Source=NASA/CXC |Author=NASA's Chandra X-ray Observatory |Date=2009-08-27 |Permission=''Images produced by NASA are usually free of copyright [...]'' |other_versions= }} Since its discovery

Impossibile sovrascrivere questo file.

Utilizzo globale del file

Anche i seguenti wiki usano questo file:

Visualizza l'utilizzo globale di questo file.

Metadati

Questo file contiene informazioni aggiuntive, probabilmente aggiunte dalla fotocamera o dallo scanner usati per crearlo o digitalizzarlo. Se il file è stato modificato, alcuni dettagli potrebbero non corrispondere alla realtà.

Estratto da "https://commons.wikimedia.org/w/index.php?title=File:Chandra_image_of_Cygnus_X-1.jpg&oldid=879847049"