On the Spectral Slopes of Hard X-Ray Emission from Black Hole Candidates

Ebisawa Ken; Titarchuk Lev; Chakrabarti Sandip K.

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On the Spectral Slopes of Hard X-Ray Emission from Black Hole Candidates

机译：黑洞候选者的硬X射线发射的光谱斜率

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Inthehighstateofblackholecandidates,inwhich2-10keVluminosityisrelativelyhigh,theenergyindexofthepower-lawlikehardX-rayemissionabove??10keVistypically??1.5.Ontheotherhand,inthelowstate,thehardX-rayenergyindexis0.3a€“0.9.Inthispaper,wesuggestthatthisdifferenceofthehardX-rayspectralslopesmaybeduetotwodifferentComptonizationmechanisms.Weproposethat,inthehighstate,thehardcomponentisgovernedbytheComptonizationduetothebulkmotionofthealmostfreelyfalling(convergentaccretion)flowclosetotheblackhole,ratherthanthermalComptonization.Thespectralslopeofthehardcomponentisinsensitivetothediskaccretionrategoverningthesoftcomponent,henceisnearlyinvariantinspiteofthesoftcomponentvariations.Thepower-lawcomponentduetothebulkmotionComptonizationhasasharpcut-offataroundtheelectronrestmassenergy,whichisconsistentwithhighenergyobservationsofthehighstate.Inthelowstate,thespectrumisformedduetothermalComptonizationofthelow-frequencydiskradiationbyasub-Kepleriancomponent(possiblyundergoingacentrifugally-supportedshock)whichisoriginatedfromtheKepleriandisk.Inthelimitoflowdiskaccretionrate,thepowerlawindexisuniquelydeterminedbythemassaccretionrateofthesub-Kepleriancomponent.

机译：Inthehighstateofblackholecandidates，inwhich2-10keVluminosityisrelativelyhigh，theenergyindexofthepower-lawlikehardX-rayemissionabove ?? 10keVistypically ?? 1.5.Ontheotherhand，inthelowstate，thehardX-rayenergyindexis0.3a€“0.9.Inthispaper，wesuggestthatthisdifferenceofthehardX-rayspectralslopesmaybeduetotwodifferentComptonizationmechanisms.Weproposethat，inthehighstate，thehardcomponentisgovernedbytheComptonizationduetothebulkmotionofthealmostfreelyfalling（convergentaccretion）flowclosetotheblackhole，ratherthanthermalComptonization.Thespectralslopeofthehardcomponentisinsensitivetothediskaccretionrategoverningthesoftcomponent因此，由于软运动变化，功率定律分量几乎不变。在大功率运动分量化过程中，功率定律分量在高能态下与电子态的能量保持一致，这与高态的高能观察一致。从极限盘流的增加率中，幂律指数由次克里普勒分量的吸积率唯一确定。

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《PASJ: Publications of the Astronomical Society of Japan》 |1996年第1期|共页
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Ebisawa Ken; Titarchuk Lev; Chakrabarti Sandip K.;
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1. ON THE SPECTRAL HARDENING FACTOR OF THE X-RAY EMISSION FROM ACCRETION DISKS IN BLACK HOLE CANDIDATES [J] . TOSHIYA SHIMURA, FUMIO TAKAHARA The Astrophysical journal . 1995,第2Pt1期

机译：黑洞候选物吸积盘X射线发射的谱硬化因子研究
2. ON THE SPECTRAL HARDENING FACTOR OF THE X-RAY EMISSION FROM ACCRETION DISKS IN BLACK HOLE CANDIDATES [J] . TOSHIYA SHIMURA, FUMIO TAKAHARA The Astrophysical journal . 1995,第2Pt1期

机译：黑洞候选物吸积盘X射线发射的谱硬化因子研究
3. Three spectral states of the disk X-ray emission of the black-hole candidate 4U 1630-47 [J] . Abe Y, Fukazawa Y, Kubota A, PASJ: Publications of the Astronomical Society of Japan . 2005,第4期

机译：黑洞候选者4U的圆盘X射线发射的三种光谱状态1630-47
4. The Extragalactic Wolf-Rayet/Black-Hole X-ray Binary Candidates NGC 300 X-l and IC 10 X-l [C] . S. Carpano, A. M. T. Pollock, A. Prestwich, Conference on A Population Explosion : the Nature and Evolution of X-Ray Binaries in Diverse Environments . 2008

机译：胶质术狼林/黑洞X射线二进制候选NGC 300 X-L和IC 10 X-L.
5. X-ray timing and spectral observations of galactic black hole candidate XTE J1550-564 during outburst. [D] . Reilly, Kaice Theodore. 2003

机译：爆发期间银河黑洞候选者XTE J1550-564的X射线定时和光谱观察。
6. Cosmological evolution of supermassive black holes in galactic centers unveiled by hard X-ray observations [O] . Yoshihiro UEDA 2015

机译：硬X射线观测揭示银河系中心超大质量黑洞的宇宙学演化
7. On the spectral slopes of the hard X-ray emission from black hole candidates [O] . Ken Ebisawa, Lev Titarchuk, Sandip K. Chakrabarti 1996

机译：在黑洞候选者的硬X射线发射的光谱斜率上

On the Spectral Slopes of Hard X-Ray Emission from Black Hole Candidates

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