Astronomy and Astrophysics
Know the most amazing type of supernovae: Type 1a Supernovae
In my article on types of supernovae, I mentioned
about all the types of supernovae and Supernovae. If you haven’t read that article then, I
strongly recommend you to read that article first and then continue reading this
article……
In that article I explained that type 1 supernovae
are believed to be created by the detonation of carbon white dwarfs when it
collapses because of electron degeneracy.
Type 1a is a special case of Type 1 supernovae in
which two stars revolve around each other. One of the star is white dwarf and
another may be a white dwarf or a giant star or a smaller star than the white
dwarf.
When a white dwarf merges with another white
dwarf which is a very rare event, it
exceeds the Chandrashekhar limit and begin to collapse and raising the
temperature. Within a few seconds of the initiation of nuclear fusion a
fraction of the matter of white dwarf undergoes runaway reaction (a kind of
reaction which tend to increase the temperature of the system further and
proceed to a destructive result, a kind of uncontrolled positive feedback) and
as a result it initialise the supernovae.
Type 1a category of
supernovae produces consistent peak luminosity because of the uniform mass of
white dwarfs that explode via the accretion mechanism. The stability of this
value allows these explosions to be used as standard candles to measure the
distance to their host galaxies because the visual
magnitude of the supernovae depends
primarily on the distance.
They are the brightest of all supernovae with an absolute magnitude of MB ~ -19.5 at maximum light, occur in
all galaxy types, and are characterised by a silicon absorption
feature in their maximum light spectra. They can eject material at speeds
of the order of 10,000 km/s and outshine an entire galaxy at their peak
brightness.
In upcoming article, I am going to explain about formation of black holes…….Once they are uploaded the link will be available here and also in my social handles.
So, don’t forget to subscribe to our website and follow me on social media for updates…..
To know basics of quantum world, astronomy and space exploration you can check out my book "Through the wormhole" on amazon kindle.
You can directly talk with me on Instagram
To meet more physics Enthusiasts please join our Facebook Page
Also for latest updates of my posts join me on TwitterTo meet more physics Enthusiasts please join our Facebook Page
Thanks for reading.....
See you next time!!!
-Ratnadeep Das Choudhury
Founder and Writer of The Dynamic Frequency
0 Comments