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NGC 6240, o la danza dei due buchi neri…
Source: GruppoLocale.it
Oct 08, 2009


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L’immagine che presentiamo si riferisce al sistema NGC 6240, ed è stata ottenuta combinando nuovi dati della sonda Chandra con immagini in banda ottica acquisite dal Telescopio Spaziale Hubble nello scorso anno. Già nel 2002, venne annunciata la scoperta in questo sistema di due buchi neri in fase di fusione, proprio basandosi su dati Chandra. I due buchi neri sono ad appena 3000 anni luce di distanza (un’inezia, per i parametri cosmici) e si possono vedere nella forma dei due puntini luminosi al centro dell’immagine.


Il sistema NGC 6240 come visto componendo dati da Chandra e da Hubble
Crediti: X-ray (NASA/CXC/MIT/C.Canizares, M.Nowak); Optical (NASA/STScI)

Gli scienziati ritengono che questi buchi neri siano tra loro così vicini perchè sono “colti” nell’atto di spiraleggiare uno intorno all’altro, in un processo che dovrebbe essere cominciato circa 30 milioni di anni fa. Si ritiene che alla fine i due oggetti compatti si fonderanno in un unico grande buco nero, anche se questo avverrà presumibilmente non prima di alcune decine o centinaia di anni. Il fenomen

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