Are there any population 3 stars?
Population III stars are a hypothetical population of extremely massive, luminous and hot stars with virtually no metals, except possibly for intermixing ejecta from other nearby Population III supernovae.
What population of star is found in the spiral arms?
Extreme Population I
Extreme Population I stars (the most metal rich stars) are found only in the spiral arms; these are the youngest stars. Intermediate Population I stars (like the Sun) are located through the disk. They are slightly less metal rich. Population II stars are metal poor stars; they contain about 0.1 percent metals.
Where are population 2 stars found?
halos
RR Lyrae variable stars and other Population II stars are found in the halos of spiral galaxies and in the globular clusters of the Milky Way system. Large numbers of these objects also occur in elliptical galaxies.
What are Population I and Population II stars?
Population I stars are younger stars found in the disk of the galaxy that contain lots of atoms heavier than helium (metals). Population II stars are older, metal-poor stars found in a galaxy’s nuclear bulge, halo, and globular clusters.
How are population 1 stars different than population 2 stars?
Population I stars include the sun and tend to be luminous, hot and young, concentrated in the disks of spiral galaxies. Population II stars tend to be found in globular clusters and the nucleus of a galaxy. They tend to be older, less luminous and cooler than Population I stars.
How big are black holes?
These black holes are very large and contain the same amount of material as 100 million or more suns. These types of black holes are several million miles across.
What existed before the sun?
solar nebula
Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.
Where is the Sgr A * object located in our galaxy?
Sagittarius A or Sgr A is a complex radio source at the center of the Milky Way which contains a supermassive black hole. It is located in the constellation Sagittarius, and is hidden from view at optical wavelengths by large clouds of cosmic dust in the spiral arms of the Milky Way.
What is the maximum mass of a population III Star?
Models place the maximum mass of a Population III star to ~1000 solar masses. Analysis of data of extremely low- metallicity Population II stars such as HE0107-5240, which are thought to contain the metals produced by Population III stars, suggest that these metal-free stars had masses of 20 to 130 solar masses.
Who first classified stars into stellar populations?
During 1944, Walter Baade categorized groups of stars within the Milky Way into stellar populations . In the abstract of the article by Baade, he recognizes that Jan Oort originally conceived this type of classification in 1926:
What is the difference between population I and Population II stars?
Population II, or metal-poor, stars are those with relatively little metal. These objects were formed during an earlier time of the universe. Intermediate Population I stars are common in the bulge near the centre of our galaxy, whereas Population II stars found in the galactic halo are older and thus more metal-poor.
https://www.youtube.com/watch?v=Jm12762qFOE