Spin Measurements of Black Holes Thomas Dauser
Spin Measurements of Black Holes Thomas Dauser
Spin Measurements of Black Holes Thomas Dauser
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Robust <strong>Spin</strong> Estimation<br />
stellar mass BH Cyg X-1: Broad Band Spectrum<br />
νFν [10 −6 × ergs s −1 cm −2 ]<br />
χ<br />
10 XMM-Newton RXTE-PCA RXTE-HEXTE<br />
5<br />
2<br />
1<br />
5<br />
3<br />
1<br />
-1<br />
-3<br />
-5<br />
5 10 20 50<br />
Energy [keV]<br />
100<br />
Integral<br />
200<br />
500<br />
Duro & <strong>Dauser</strong> et al. (2013, in<br />
prep.)<br />
Broad Band<br />
Coverage<br />
(Simultaneous<br />
observations) ( first<br />
robust stellar mass BH spin<br />
measurement)<br />
Cygnus X-1 is a fast<br />
rotating black hole<br />
(a > 0.9), and<br />
compact emission<br />
region (h < 4rg)<br />
<strong>Spin</strong> in agreement<br />
with the “disk-spin”<br />
method (Gou et al., 2011)
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