| Planetary Masses - 3rd attempt | |
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marasama SuperEarth
Number of posts : 220 Location : Earth Registration date : 2008-04-22
| Subject: Planetary Masses - 3rd attempt 7th July 2008, 12:09 am | |
| TYPE | MASS
| Brown Dwarf
| if [Fe/H] > 0, then ~13 to ~65Mj if [Fe/H] = 0, then ~13 to ~80Mj if [Fe/H] < 0, then ~13 to ~80-90Mj
| Transitional Planets
| Mass between 12-14Mj, due to metallicity
| Gray-area between planet & sub-brown dwarf
| Mass at ~5 to 12Mj
| Electron degeneracy | Begins at ~2Mj | Metallic hydrogen | Begins at ~0.1Mj / 31.8Me | Ability to start accreting gas
| Begins at ~7-15Me
| Ability to maintain volatile?
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| Ability to maintain a tenuous atmosphere?
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Any suggestions/criticisms would is welcomed. _________________ Thanks, CarpD (^_^)
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Edasich dK star
Number of posts : 2295 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Planetary Masses - 3rd attempt 7th July 2008, 5:26 am | |
| I would set limit to "ability to mantain volatile" between <0.15-5 Me. And "mantaining a tenuous atmosphere" between <0.05-<0.1 Me. | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Planetary Masses - 3rd attempt 7th July 2008, 3:04 pm | |
| A very interesting table! Where did you get the information for it? _________________ Caps Lock: Cruise control for 'Cool'!
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Edasich dK star
Number of posts : 2295 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Planetary Masses - 3rd attempt 7th July 2008, 3:28 pm | |
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Lazarus dF star
Number of posts : 3337 Registration date : 2008-06-12
| Subject: Re: Planetary Masses - 3rd attempt 7th July 2008, 3:34 pm | |
| Note that electron degeneracy starts much, much earlier than 2 Jupiter masses: it is a minor contribution even in everyday solids, and degeneracy pressure is at least partially responsible for holding up the cores of even low mass planets.
It is at ~2 Jupiter masses where the dominant contribution to the core pressure is degeneracy pressure rather than electrostatic repulsion, so increasing mass results in decreasing radius. | |
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Edasich dK star
Number of posts : 2295 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Planetary Masses - 3rd attempt 8th July 2008, 5:56 am | |
| I wonder why they've still not given Lazarus Nobel Prize His knowledge seems infinite... | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Planetary Masses - 3rd attempt 8th July 2008, 9:22 am | |
| - Edasich wrote:
- His knowledge seems infinite...
I know, right. Lazarus is very, very knowledgable. I admire him for it. It makes me wonder though... Lazarus if you don't mind me asking, what is your level of formal education? _________________ Caps Lock: Cruise control for 'Cool'!
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Edasich dK star
Number of posts : 2295 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Planetary Masses - 3rd attempt 8th July 2008, 11:56 am | |
| According to me he's a Nobel scientist which's hiding beyond anonymous forum user ... *lol: | |
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marasama SuperEarth
Number of posts : 220 Location : Earth Registration date : 2008-04-22
| Subject: Re: Planetary Masses - 3rd attempt 8th July 2008, 3:52 pm | |
| I got the table from previous entries in extrasolar forum, very long time ago. What would be the electron degeneracy mass be at? _________________ Thanks, CarpD (^_^)
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marasama SuperEarth
Number of posts : 220 Location : Earth Registration date : 2008-04-22
| Subject: Re: Planetary Masses - 3rd attempt 26th November 2008, 7:56 pm | |
| This is a rough outline on the major classes based on only the mass. * | Brown Dwarf | if [Fe/H] > 0, then ~13 to ~65Mj if [Fe/H] = 0, then ~13 to ~80Mj if [Fe/H] < 0, then ~13 to ~80-90Mj | A | Crossover Planet | masses around and above ~13Mj. | B | Super Giant Planet | above Jupiter, maybe ~5-12Mj | C | Giant Planet | where Jupiter is | D | Subgiant Planet | maybe Saturn maybe around the metallic hydrogen formation? ~0.1Mj / 31.8Me | E | Transitional Planet | where the mass is enough to being the process of being a gas giant ~7-15Me | F | Dwarf Planet | where Earth is | G | Subdwarf Planet | where Mercury is | H | Planetoid | where Ceres is | I | Subplanetoid | smaller asteroids and giant boulders |
I'm thinking Pluto will probably at G (Subdwarf Planet) area, since it still has significant atmospheric activities. But it could also be cause it is far out in the cold. Need to wait and see if they find something smaller beyond Neptune and see if it still exhibit an atmopheric change. I'll update this if I or anyone have any new information. _________________ Thanks, CarpD (^_^)
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Planetary Masses - 3rd attempt 26th November 2008, 8:06 pm | |
| So your classification would group Saturn, Uranus, Neptune, and Gliese 436 b into a single category? _________________ Caps Lock: Cruise control for 'Cool'!
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marasama SuperEarth
Number of posts : 220 Location : Earth Registration date : 2008-04-22
| Subject: Re: Planetary Masses - 3rd attempt 26th November 2008, 8:41 pm | |
| Uranus = 14.536Me Neptune = 17.147Me Gliese 436b = 22.2±1.0Me Saturn = 95.152Me
So far it looks: Saturn = subgiant planet Gliese 436b = crossing between the transitional/subgiant planet range Neptune = crossing between the transitional/subgiant planet range Uranus = probably going to be in the transitional planet _________________ Thanks, CarpD (^_^)
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