Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-05-12
Science 300 (2003) 1119-1120
Astronomy and Astrophysics
Astrophysics
8 pages, 1 color figure, PDF version only. Link to the comments article in Science Now: http://sciencenow.sciencemag.org/cgi
Scientific paper
10.1126/science.1083451
We show that the black hole in the x-ray binary Cygnus X-1 was formed in situ and did not receive an energetic trigger from a nearby supernova. The progenitor of the black hole had an initial mass greater than 40 solar masses and during the collapse to form the ~10 solar mass black hole of Cygnus X-1, the upper limit for the mass that could have been suddenly ejected is ~1 solar mass, much less than the mass ejected in a supernova. The observations suggest that high-mass stellar black holes may form promptly, when massive stars disappear silently.
Mirabel Felix
Rodrigues Irapuan
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