Many people know about black holes but don't know exactly what a black hole is. To put it simply, a black hole is an area in space where the pull of gravity is so strong nothing can escape, not even light. What is inside a black hole? The inside of the black hole is called the...
we consider the case where after we inject radiation Fin of non-zero total energy μ, the system radiates back the same total amount of energy, but with a possibly different distribution Fout.8 While such systems are of course special, we will see that black holes can be one of them. ...
Using the criterion explained above, we can “continue” the wavepacket inside the horizon by a suitable analytic continuation. More precisely, we need an analytic continuation of the form xμ→ xμ + iyμ, where yμ belongs to the future lightcone to ensure that we will then be dealing ...
As black holes gravitationally draw matter toward their event horizons, a high proportion of this matter is converted into energy. Radiation from this conversion process is deadly for advanced life. The apparent incompatibility of black holes with advanced life raises a problem for Christians and othe...
We study radio and X-ray emissions from intermediate-mass black holes (IMBHs) and explore the unified model for accretion and ejection processes. The radio band survey of IMBH (candidate) hosted galaxies indicates that only a small fraction (∼0.6%) of them are radio-band active. In addit...
‘small’ black holes the broadening is expected to be substantially smaller. Moreover, there are classes of type 1 AGN that have broad lines with widths less than 1,000 km s−1: these are the so-called Narrow Line Seyfert 1 (NLSy1), the permitted lines of which are broader ...
However, we do have two very interesting limits on the formation of the first black holes. The first comes from observations of the most distant known black holes: light is emitted by material falling into the deep gravitational potential of the black hole. These monsters are so bright that ...
Finally, I did address how can black holes merge or grow in the pinned FAQs. In the hindsight, I think I could have addressed those in the video itself." Which is the main thing that prompted my question. I unfortunately do not have access to the textbooks or know where ...
(They would leave holes like a speeding bullet traveling through a wall of glass.) Looking in older materials provides the best odds, simply because such things have been around for ages and have had more opportunity for a black hole impact. It's also much cheaper to look for tunnels than...
For the background field configuration explained above, the term in vanishes and the Y term can be expressed in terms of X and F, as . Therefore, we will simply consider the function of the form . On the background (2.9), the term proportional to in Eq. (2.6) also vanishes. Then,...