0
supernovae are classified by the lines in their spectra (which indicate which elements are present). type I supernovae have no hydrogen lines, having been caused by the explosion of a star with no hydrogen envelope. type II supernovae have hydrogen lines, indicating that the exploding progenitor star had retained a significant amount of its hydrogen before its supernova.
type I supernovae are further classified based on the presence of silicon lines, which are present in type Ia supernovae but not types Ib and Ic.
What else can I help you with?
What are Type II supernovae produced by?
Supernovae are classified as Type I or Type II depending upon the shape of their radioactive decay of the unstable heavy elements produced in the explosion.
Why does a type Ia supernova make a better indicator of distance than a type II supernova?
Type Ia supernovae [See Link] follow a characteristic light curve. This luminosity is generated by the radioactive decay of certain elements. The peak luminosity of the light curve was believed to be consistent across Type Ia supernovae as having a maximum absolute magnitude of about -19.3. This would allow them to be used as a secondary "standard candle" [See Link] to measure the distance to their host galaxies
What is the main difference between meiosis I and meiosis II is that in meiosis II?
four gametes are produced for every original cell
What are supernovae explosions of type 2?
A Type II supernova results from the rapid collapse and violent explosion of a massive red supergiant star. A star must have an initial mass of roughly at least 8 times (and no more than 40-50 times) the mass of the Sun for this type of explosion. The star produces a massive core of iron by a series of nuclear fusion reactions. Iron cannot be used to produce more energy and the core collapses under gravity. The energy released in this gravitational collapse is the cause of the explosion. Also there is the presence of hydrogen in the composition of the spectrum. Finally, this type of supernova is seen only in the spiral arms of galaxies and in H II galaxies, but not in elliptical galaxies.
What can you conclude about a Type I supernova?
It is right to conclude that a type I supernova is what it is because it managed to take out so much matter from its surrounding neighbor until it exceeded a 1.4M Chandrasekhar limit. Exceeding that limit meant that it had to tip over.
What are Type II supernovae produced by?
Supernovae are classified as Type I or Type II depending upon the shape of their radioactive decay of the unstable heavy elements produced in the explosion.
Black holes form from the remains of stars that?
"explode as supernovae". These are called Type II supernovae and sometimes a neutron star is formed, not a black hole.
What are the key differences between a type 1a supernova and a type 2 supernova?
Type 1a supernovae occur in binary star systems where one star is a white dwarf that accumulates material from its companion until it reaches a critical mass, causing a thermonuclear explosion. Type 2 supernovae happen when a massive star runs out of fuel and collapses under its own gravity, leading to a powerful explosion. The key difference is the mechanism of the explosion: type 1a is caused by thermonuclear reactions, while type 2 is due to gravitational collapse.
What is the difference between Dexron II and type D valvoline ATF?
there is no difference..atf type D is a designation of valvoline..
What is the difference between a 1979 s type 1 and 2 Jefferson nickel?
For the type I the mintmark is filled and the type II the mintmark is clear.
What is the difference between a Type I error and a Type II error in hypothesis testing?
In hypothesis testing, a Type I error occurs when a true null hypothesis is incorrectly rejected, while a Type II error occurs when a false null hypothesis is not rejected.
What is the difference between Basel II and Basel III?
There is a main difference between Basel II and Basel III. In Basel III, there is a 4.5% capital buffer to absorb shock. With Basel II, there is no capital buffer.
What is the difference type 1 and type 2 roofing felt?
type I is 15# felt and type II is 30# felt
What are the symptoms that distinguish between type I and type II diabetes?
Type II diabetes symptoms tend to be more severe than thype I.
What is the difference between bronco ii and Eddie Bauer brono ii?
so take a ford f150... the only difference between it and a "king ranch edition" f150 is its nicer and more expensive. its just a higher end model of the bronco II.
What is the difference between snowball I and snowball II the simpson's cat?
snowball I had white snowball II is a black cat
Why does a type Ia supernova make a better indicator of distance than a type II supernova?
Type Ia supernovae [See Link] follow a characteristic light curve. This luminosity is generated by the radioactive decay of certain elements. The peak luminosity of the light curve was believed to be consistent across Type Ia supernovae as having a maximum absolute magnitude of about -19.3. This would allow them to be used as a secondary "standard candle" [See Link] to measure the distance to their host galaxies
