Post on 18-Dec-2014
description
- DEATH OF LARGE STARS -THE BLACK HOLE
Persico Francesco V D
THE BIRTH OF A BLACK HOLE Red Supergiant
Supernove or Hypernove explosions
nucleus bigger than 1,44 solar masses
Chandrasekhar limit
Betelgeuse
Black Hole
Subrahmanyan Chandrasekhar ( 1910/1995) Mu Cep Antares
really violent implosion
stellar core “impossibly” dense
over the Pauli exclusion principle
center of the Black Hole smaller than the nucleus of an atom
Singularity
Stephen Hawking
Roger Penrose
Wolfgang Pauli (1900/1958)
--------------- Click here. --------------
(10−10 m).
“out of existence”
Black Hole “Black”
infinitely strong gravitational field
gravity
nothing, not even a beam of light (speed of 300 000 km/s), can escape it
the curvature in the space-time of Einstein is infinite near the black hole
Albert Einstein (1879/1955)
“event horizon”
limit of Black Hole
“Accretion Disk”
“THE BLACK HOLES ARE NOT SO BLACK”
flat disk of spinning material around the Black Hole
high speeds
glow
jets of high-speed gas
intense magnetic fields like a pulsar
Black Hole Pulsar-------click here.--------
some Black Holes swallow neighboring star------click here-------
This Black Hole----click here----
Milky Way
spins 100 times per second.
no accretion disk
hypothesis
enormous Black hole
central core of the Milky Way.
summary
death of a massive star
Supernove explosion
Neutron Star Pulsar
Black dwarf
Hypernove explosion
Black Hole
appears to exist forever
BIBLIOGRAPHY Celestia Educational Activity 6: The Life and Death of Stars; “Geografia Generale” Crippa-Fiorani; http://it.wikipedia.org/wiki/Buco_nero.