my baby picture!
my baby picture!
my baby picture! by TwilightMyth
![my baby picture! by TwilightMyth](http://pictures.fanart-central.net/t/TwilightMyth/674686/TwilightMyth-674686-my_baby_picture.jpg)
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Category Comics » Sonic the Hedgehog » Fan Characters (OC's)
Date Submitted
Views 1358
Favorites... 4
Vote Score 4
Category Comics » Sonic the Hedgehog » Fan Characters (OC's)
Date Submitted
Views 1358
Favorites... 4
Vote Score 4
Comments
20
Media Other digital art
Time Taken no, i wont tell
Reference none
Media Other digital art
Time Taken no, i wont tell
Reference none
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Falconlobo on July 31, 2008, 7:55:55 AM
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![Falconlobo Falconlobo](http://fanart-central.net/avatars/50550.jpg)
TwilightMyth on July 31, 2008, 8:04:28 AM
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Falconlobo on July 31, 2008, 8:06:40 AM
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TwilightMyth on August 1, 2008, 1:54:00 AM
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Falconlobo on August 1, 2008, 3:12:02 AM
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Rebel94 on July 31, 2008, 1:44:46 PM
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wispo on July 27, 2008, 12:56:12 AM
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TwilightMyth on July 30, 2008, 5:05:22 AM
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TwilightMyth on July 29, 2008, 6:01:40 AM
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wispo on July 27, 2008, 12:56:43 AM
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![wispo wispo](http://fanart-central.net/avatars/DefaultAvatar.jpg)
The hydrogen fusion process is temperature-sensitive, so a moderate increase in the core temperature will result in a significant increase in the fusion rate. As a result the core temperature of main sequence stars only varies from 4 million K for a small M-class star to 40 million K for a massive O-class star.[83]
In the Sun, with a 10 million K core, hydrogen fuses to form helium in the proton-proton chain reaction:[110]
41H → 22H + 2e+ + 2νe (4.0 MeV + 1.0 MeV)
21H + 22H → 23He + 2γ (5.5 MeV)
23He → 4He + 21H (12.9 MeV)
These reactions result in the overall reaction:
41H → 4He + 2e+ + 2γ + 2νe (26.7 MeV)
where e+ is a positron, γ is a gamma ray photon, νe is a neutrino, and H and He are isotopes of hydrogen and helium, respectively. The energy released by this reaction is in millions of electron volts, which is actually only a tiny amount of energy. However enormous numbers of these reactions occur constantly, producing all the energy necessary to sustain the star's radiation output.
Minimum stellar mass required for fusion Element Solar
masses
Hydrogen 0.01
Helium 0.4
Carbon 4
Neon 8
In more massive stars, helium is produced in a cycle of reactions catalyzed by carbon—the carbon-nitrogen-oxygen cycle.[110]
In evolved stars with cores at 100 million K and masses between 0.5 and 10 solar masses, helium can be transformed into carbon in the triple-alpha process that uses the intermediate element beryllium:[110]
4He + 4He + 92 keV → 8*Be
4He + 8*Be + 67 keV → 12*C
12*C → 12C + γ + 7.4 MeV
For an overall reaction of:
34He → 12C + γ + 7.2 MeV
In massive stars, heavier elements can also be burned in a contracting core through the neon burning process and oxygen burning process. The final stage in the stellar nucleosynthesis process is the silicon burning process that results in the production of the stable isotope iron-56. Fusion can not proceed any further except through an endothermic process, and so further energy can only be produced through gravitational collapse.[110]
The example below shows the amount of time required for a star of 20 solar masses to consume all of its nuclear fuel. As an O-class main sequence star, it would be 8 times the solar radius and 62,000 times the Sun's luminosity
TwilightMyth on July 29, 2008, 6:02:31 AM
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TwilightMyth on July 8, 2008, 10:08:26 AM
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gonemad on June 9, 2008, 8:10:35 AM
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TwilightMyth on June 18, 2008, 8:01:51 AM
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gonemad on July 4, 2008, 9:01:29 AM
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dingocat on March 26, 2008, 6:30:36 AM
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TwilightMyth on June 18, 2008, 8:00:49 AM
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Secret on June 18, 2008, 8:07:33 AM
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CrystalKnight on June 9, 2008, 9:09:14 AM
TwilightMyth on June 18, 2008, 8:02:09 AM
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