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XTE J1650-500 : ウィキペディア英語版
XTE J1650-500
XTE J1650-500 is a binary system containing a stellar-mass black hole candidate and 2000–2001 transient binary X-ray source located in the constellation Ara.
In 2008, it was claimed that this black hole had a mass of 3.8±0.5 solar masses,〔(Smallest, lightest black hole identified ) Technology & science - Space - Space.com By Andrea Thompson, updated 4/1/2008 4:32:08 PM ET〕 which would have been the smallest found for any black hole; smaller than GRO 1655-40, the then known smallest of 6.3 MSun. However, this claim was subsequently retracted;〔(Determination of Black Hole Masses in Galactic Black Hole Binaries Using Scaling of Spectral and Variability Characteristics ) Shaposhnikov, Nickolai; Titarchuk, Lev; The Astrophysical Journal, Volume 699, Issue 1, pp. 453-468 (2009) (Pdf )〕 the more likely mass is 5–10 solar masses.
The binary period of the black hole and its companion is 0.32 days.〔Orosz, J.A. et al. (2004) ApJ 616,376-382.〕
==See also==

* Stellar black hole

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