To understand why, it will help to define what a black hole is and how it interacts with the universe around it. Astronomers have only observed black holes indirectly, yet they can paint a clear picture, albeit one based on circumstantial evidence. They feel certain, for example, that black...
However, observed rotation curves in disk galaxies suggest dark matter halos with isothermal cores. The same kind of problem can be found for globular clusters, which show cores in their density profiles but should be cuspy if they where formed through a cold collapse(King, 1962; Jenkins et ...
Cosmologists have an expanding problem ... literally. Could gravitational waves from merging black holes be the answer?
“In our hybrid approach, we combine the observed growth by accretion with the simulated growth through mergers to reproduce the growth history of supermassive black holes,” Brandt said. “With this new approach, we believe we have produced the most realistic picture of the growth of supermassive...
The central ≈ 80×200 pc of the barred spiral galaxy M83 (NGC 5236) has been observed with the GEMINI-S+CIRPASS configuration which produced 490 spectra with a spectral resolving power of 3200, centered at 1.3 microns, oriented NW-SE. We determine the kinematics of this region with 0.36″...
Black holes are supposed to evaporate away, but start with something even more exotic and an everlasting black hole becomes possible – in theory
“Our goal is to simulate light curves for a broad and representative range of the quasar population to be observed by Rubin,” the authors explain. This figure from the research shows some of the simulated LSST light curves that the Deep Drilling Fields will produce. The top panel shows a...
Even in the furthest recesses of cosmic time we see supermassive black holes gorging on gas. But they shouldn’t be there THEY are the great dark spots of the universe. Not merely black holes, but enormous black holes, billions of times the mass of our sun. They are everywhere we look,...
Functions of this form are often used as models to describe the density profile of dense stellar clusters. For black holes the spin can be characterized via the angular momentum parameter [Math Processing Error], where J is the angular momentum and M the mass of the black hole. It has the...
Minsley and collaborators found that within galaxies with active black holes, the ISM is warmer, the ratios of warm molecular gas to other coolants are larger, and other features from dust particles have a wider range of values than in galaxies where the black holes are dormant. ...