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A few candidates for stellar black holes have been found e.g., the X-ray source Cygnus X-1.
(If these black holes exist, they could result from a merger of stellar black holes or a collision of two stars).
Whereas the existence of stellar black holes has been strongly indicated, the existence of neutron stars was confirmed in 1968 when they were identified with the then newly discovered pulsars, objects characterized by the emission of radiation at short and extremely regular intervals, generally between 1 and 1,000 pulses per second and stable to better than a part per billion.
In another study, published this week in the journal Astronomy and Astrophysics, French and Argentine astronomers said observations by the Hubble Space Telescope and ground-based telescopes had detected a stellar black hole streaking across the Milky Way at some 250,000 miles an hour.
Scientists have so far identified two types of black holes: giant ones with the masses of millions of stars that lurk at the core of galaxies, as in NGC 6240 and the Milky Way, and smaller stellar black holes, the collapsed remnants of big stars with masses 3 to 15 times that of the Sun.
Although 10 other similar systems of a black hole paired with a normal star have already been reported, Dr. Foltz said they were "still rare enough that each new one is important because there are still scientists who feel the whole idea of stellar black holes has not been proven".
Similar(38)
Slim disks around massive stellar black-holes of up to several tens of solar mass would naturally explain the observed properties of ULXs.
We have found that the slim disk model is successful to explain ULX spectra, in terms of the massive stellar black-holes with several tens of solar mass and the super-Eddington mass accretion rates.
It was suggested that the distortion of the Fe Kα emission results from Doppler and relativistic effects affecting the radiative transfer close to the strong gravitational well of the central compact object: a stellar mass black hole (BH) or neutron star (NS) in the case of XRBs, or a super massive black hole (SMBH) in the case of AGN.
"Stellar," a black Cambridge police lieutenant said in describing him.
Toulon have announced that the stellar All Black centre Ma'a Nonu, one of the key figures in New Zealand's successful defence of the World Cup last month, will be available for the domestic Top 14 game against Agen a week on Saturday.
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