The observed variety of types of Active Galactic Nuclei (AGN) in galaxies with various masses and morphologies is considered. It is proposed that this diversity is related to the evolutionary development of their host galaxies and central regions, including their bulges, massive black holes, and ...
Black holes prevent particles of matter or even electromagnetic radiation such as visible light can emerge again, hence the name. Some galaxies have compacted centers surrounding their supermassive black holes with an extremely high luminosity, called active galactic nuclei (AGN). ...
Spiral galaxies are the most common type in the universe. OurMilky Wayis a spiral, as is the rather close-byAndromeda Galaxy. Spirals are large rotating disks of stars and nebulae, surrounded by a shell of dark matter. The central bright region at the core of a galaxy is called the “g...
Do they mean that the object is emitting energy across a large part of the spectrum, or that it's emitting a lot of energy? Also, I am confused by the different types of active galaxies. I'm trying to work out the main ones though (I'm writing an essay and ...
Studies of the OVV QSO 3C 446 indicate that the gas in its line-emitting region is being ionized by the relativistically-beamed continuum, and it is suggested that a similar phenomenon may be taking place in many non-blazar QSOs and radio galaxies....
Most galaxies have black holes at their centers that can produce a tremendous amount of energy, which astronomers can see over great distances. In some cases, a galaxy’s central black hole is extremely large or active, even in relatively small galaxies. Material circling the black hole may be...
Stars in the main sequence will have a size that depends on their mass, which defines the amount of gravity pulling them inward. Blue Stars Blue stars are typically hot, O-type stars that are commonly found in active star-forming regions, particularly in the arms of spiral galaxies, where ...
Billions, even trillions of stars, along with gas, dust and other celestial objects, are grouped together in each galaxy. Wait - there's more! While astronomers do not know how many galaxies are in the whole universe, they believe that there could be at least one hundred billion!
The so-called classic explosion, associated with Type II supernovae, has as progenitor a very massivestar(a Population I star) of at least eight solar masses that is at the end of its active lifetime. (These are seen only inspiral galaxies, most often near the arms.) Until this stage ...
The so-called classic explosion, associated with Type II supernovae, has as progenitor a very massive star (a Population I star) of at least eight solar masses that is at the end of its active lifetime. (These are seen only in spiral galaxies, most often near the arms.) Until this ...