03-25-2013, 12:28 AM | #1 |
Join Date: Mar 2013
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[Space] Multiple/Lots of Stars in one system
I posted about this system before, but now I'm having trouble with a different part of it.
When dealing with lots of star how do you deal with Forbidden Zones? The Primary (1) has two distant companions (2 and 3) which in turn have their own distant companions (4 and 5) and star number 5 has made it's roll to have it's own companion (whose details I haven't really started working out yet and the system way still grow bigger) So for Star 1 do I simply use the closest of it's companions (2) when determining the Forbidden Zone or do I have to worry about how close their companions could come to 1 at closest approach? |
03-25-2013, 02:04 AM | #2 |
Computer Scientist
Join Date: Aug 2004
Location: Dallas, Texas
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Re: [Space] Multiple/Lots of Stars in one system
[EDIT: This is for habitable zones, not forbidden zones. Don't post under the influence of hypoxia, kids!]
You can generally ignore distant companions. If they are close companions, multiply individual zone sizes by this chart: Code:
stars multiple 2 1.4 3 1.7 4 2 5 2.2 6 2.4 7 2.6 8 2.8 9 3 Last edited by jeff_wilson; 03-25-2013 at 01:11 PM. |
03-25-2013, 02:56 AM | #3 | |||
Join Date: Mar 2013
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Re: [Space] Multiple/Lots of Stars in one system
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There is a mention made of planets orbiting a binary pair, but there's no solid guidance on that and it gets quite complex as more stars get involved. Quote:
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03-25-2013, 03:05 AM | #4 | |
Join Date: Mar 2013
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Re: [Space] Multiple/Lots of Stars in one system
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03-25-2013, 10:45 AM | #5 | |
Computer Scientist
Join Date: Aug 2004
Location: Dallas, Texas
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Re: [Space] Multiple/Lots of Stars in one system
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03-25-2013, 10:59 AM | #6 | |
Computer Scientist
Join Date: Aug 2004
Location: Dallas, Texas
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Re: [Space] Multiple/Lots of Stars in one system
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The square roots are due to the inverse square law for radiant energy intensity. For instance, if there were two suns just alike right next to each other, there would be twice as much radiant energy in their solar system as in a single-sun solar system. That means the borders of the habitable zone would be 1.4 times farther from the two suns, because 1.4*1.4~=2 for twice as many suns making it twice as hot at the single radius. Also, 1/1.4 * 1/1.4 ~= 1/2 half as hot for being 1.4 times as far away. Now if you combine both situations, 1/2 as hot for distance and 2 times as hot for multiple suns, 1/2 * 2 = 1, so that with two suns, you have the same temperature range at distances 1.4 times as far away. |
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03-25-2013, 11:32 AM | #7 | |
Join Date: Aug 2007
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Re: [Space] Multiple/Lots of Stars in one system
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Fred Brackin |
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03-25-2013, 11:46 AM | #8 | |
Join Date: Dec 2007
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Re: [Space] Multiple/Lots of Stars in one system
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As for inner and outer limits, the only thing to need to worry about is the star that comes closest. Distant companions are almost never an issue. |
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03-25-2013, 11:49 AM | #9 | |
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Join Date: Sep 2004
Location: Southeast NC
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Re: [Space] Multiple/Lots of Stars in one system
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A sun mass star has an outer limit of 40 AUs, which would be in a forbidden zone of a star with a periapsis of 120 AU or less. A bit different "rolls" might have put Neptune further out, or squeezed the gas giants' orbits together enough to fit another one in.
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RyanW - Actually one normal sized guy in three tiny trenchcoats. |
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03-25-2013, 01:04 PM | #10 | |
Join Date: Mar 2013
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Re: [Space] Multiple/Lots of Stars in one system
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Okay, so this only refers to the zones for the planetary temperature, and has nothing to do with the valid orbital positions for planets? |
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space, system generation |
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