THE advancement OF STARSGREATER 보다 8 SOLAR MASSES

As the star pipeline the MS, the main point goes through the triple-alpha procedure producing a carbon-oxygen core.The core will continue to contract, boosting in density and also temperature.Many fusion reactions develop heavy elements inside the star and also produce an "ONION-SKIN" Structure, with iron in the core.
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AFTER . . . . . BEFORE
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SUPERNOVA = EXPLODING STAR

Two important results of Supernovae: 1. Many aspects are ejected into space. 2. Shock wave will trigger new star formation.Famous Supernovae: SN 1987A in the huge Magallenic Cloud. Kepler"s Supernova in 1604. Tycho"s Supernova in 1572. Crab Nebula Supernova in 1054.

You are watching: All stars that become supernovae will leave behind a neutron star.

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What"s Left Behind? 1. Ghost Star = Pulsar because that stars in between 8 and also 25 solar masses. 2. Black color Hole because that stars higher than 25 solar masses.

NEUTRON STARS or PULSARS

When the gravitational force becomes so good in a white dwarf(such as as soon as the massive is higher than 1.4 solar masses), gravityforces the electrons and also protons together to kind neutrons.Neutron Star straightforward Facts:Remnants native supernovae that stars between around 8 and also 25 solar masses.Mass: 1 come 2 solar masses. Largest mass feasible is between 2 and also 3 solar masses.Size: only 10 come 20 kilometers in radius!Just 1 teaspoon of the ingredient on earth would sweet as much as every the human being in China!Like white dwarfs; the an ext mass they have, the smaller sized the radius will be.
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Neutron stars have additionally been determined asPulsars.Neutron stars rotate very rapidly, 1 come 1000 timesa second! They also have very solid magnetic fields.Electrons in this promptly rotating magnetic ar producelots that radio tide in a beam coming the end the north and south magnetic poles. In a comparable fashion come alighthouse, together the ghost star rotates,this beam is sometimes directed in the direction of us and also we receive a pulse of radio emission.
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BLACK HOLES

For stars higher than 25 solar masses, the core has actually too much mass to become a spirit star after ~ the supernovaexplosion. In the case, a black color HOLE is created.Some black color HOLE preliminary stuffThe rate of light is the exact same for every observers!The rate of light is THE rate limit. Nothing have the right to go quicker than 300,000 km/sec.Escape Velocity: Speed compelled to get over the gravitational pull and break far from an object.E = m c2. Mass-Energy Equivalence. Heaviness pulls Mass. Heaviness pulls energy (photons!)Moving clocks (Time) appear to operation slower. The quicker the clock moves, the slow it will show up to run.Gravity renders clocks (Time) operation SLOWER! This is no a clock problem, yet a TIME problem. Time is impacted by Gravity!

BLACK HOLES

Black Holesare objects of highly compressed issue from whichlight cannot escape because of the extremely solid gravitationalpull. The mass of the black color hole is compressed into a pointknown together a SINGULARITY.Black holes space surrounded through an imagine SURFACEknown together the event HORIZON. Itis within this event Horizon that us cannot observe. Theinformation of any event the occurs inside the occasion Horizoncannot with the external Universe! hence the term black Hole.
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The event Horizon is likewise known as the"Schwarzschild Radius"

RSch = 3 km x (Mass/MSun)

How perform You Look for a black Hole?

Look for the affect of that is gravitational pull. Binary starswhere you deserve to only view one star "wobbling" is a good place tostart. If gas indigenous the star is falling right into the black hole,lots of X-rays will certainly be emitted.

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Candidates because that being a black Hole: Cygnus X-1 Unseen companion around 6 solar masses. LMC X-3 Unseen companion around 10 solar masses.IMPORTANT POINTBlack holes space NOT large vacuum cleaners inspace. Their gravitational pressure is only solid very close tothem. If the sun were to come to be a black color hole, the orbit of theEarth would not change.Black holes arenot prefer this!

FALLING into A black HOLE

If you are falling in, you autumn in! If you clock someone autumn in, castle NEVER loss in. They just would it seems to be ~ to get closer and also closer come the event Horizon, never crossing it, and also become fainter and also fade out of sight. There space two factors for this being what you see: under photons reach you due to the slowing of Time in the gravity field. Photons that do reach you are redshifted by gravity.

Summary that Post-Main-Sequence Evolution

Stars of 0.1 come 8 solar masses end up as WHITE DWARFS.Stars of 8 to 25 solar masses finish with a SUPERNOVA and leave behind a ghost STAR.Stars larger than 25 solar masses finish with a SUPERNOVA, yet leave behind a black HOLE.Stellar Structure and Evolution SimulatorShows the development of different mass stars off the MS.Even contains the supernova explosion for high-mass stars!Death of High-Mass StarsThe Milky means Galaxy. Earlier to The former Page.