出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：For microquasars, the one time when these systems exhibit steady and powerful jets is when they
are in the hard state. Thus, our understanding of this state is key to learning about the disk/jet
connection. Recent observational and theoretical results have led to questions about whether we
really understand the physical properties of this state, and even our basic picture of this state is
uncertain. Here, I discuss some of the recent developments and possible problems with our understanding
of this state. Overall, it appears that the strongest challenge to the standard truncated disk
picture is the detection of broad iron features in the X-ray spectra, and it seems that either there
is a problem with the truncated disk picture or there is a problem with the relativistic reflection
models used to explain the broad iron features.
