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How about a topic about ONLY brown dwarfs orbiting stars, orbiting each other and stand alone?
A Brown Dwarf Main Topic
by Edasich on Fri Nov 21, 2008 6:52 am
We have "Unconfirmed/Unpublished Exoplanets Catalogue" for doubtful or suspected planetary objects. As you know, dear John Whatmough's original site included an "Extrasolar Planets Catalogue" and a "Brown Dwarfs List".
How about making a post about ONLY brown dwarf objects (i.e substellar non-planetary objects). It should include both brown dwarfs orbiting around standard stars (ex. GJ 229 B, 15 Sge B etc.), both twin brown dwarfs orbiting each other (ex. PPL 15 AB), either stand alone objects (ex. OTS 44).
Meanwhile I would submit a first draft of several substellar object detected so far, if you wish.
Obviously such a topic should be sticky and placed above "Unconfirmed/Unpublished Exoplanet Catalogue".
Someway we'd keep Whatmough's original subdivision.
Post here you opinion.
How about making a post about ONLY brown dwarf objects (i.e substellar non-planetary objects). It should include both brown dwarfs orbiting around standard stars (ex. GJ 229 B, 15 Sge B etc.), both twin brown dwarfs orbiting each other (ex. PPL 15 AB), either stand alone objects (ex. OTS 44).
Meanwhile I would submit a first draft of several substellar object detected so far, if you wish.
Obviously such a topic should be sticky and placed above "Unconfirmed/Unpublished Exoplanet Catalogue".
Someway we'd keep Whatmough's original subdivision.
Post here you opinion.
Edasich- Saturn-Mass
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Location: Tau Ceti d - Northern hemisphere
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Re: A Brown Dwarf Main Topic
by Lazarus on Fri Nov 21, 2008 7:02 am
The current way we don't have to start worrying about whether an object is a BD or a planet when we post the discovery.
Does a thread on an m sin i = 11 Jupiter masses object go into the planets or brown dwarfs forum? (The probability that such an object exceeds 13 Jupiter masses is roughly 50%)
What definition do we use for the dividing line? Supposing an object with 20 Jupiter masses but signs of a massive heavy element core is found - does that count as a superplanet or a brown dwarf? What about if a system of >13 Jupiter mass objects is found with a planet-like architecture?
Does a thread on an m sin i = 11 Jupiter masses object go into the planets or brown dwarfs forum? (The probability that such an object exceeds 13 Jupiter masses is roughly 50%)
What definition do we use for the dividing line? Supposing an object with 20 Jupiter masses but signs of a massive heavy element core is found - does that count as a superplanet or a brown dwarf? What about if a system of >13 Jupiter mass objects is found with a planet-like architecture?
Lazarus- Jovian
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Re: A Brown Dwarf Main Topic
by Edasich on Sat Nov 22, 2008 6:35 am
Well, it was supposed to keep someway Whatmough's original organization.
However I wait for next votes.
However I wait for next votes.
Edasich- Saturn-Mass
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Location: Tau Ceti d - Northern hemisphere
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Re: A Brown Dwarf Main Topic
by Edasich on Wed Dec 17, 2008 4:10 pm
Excuse me for "necro-posting", but I see fifty-fifty poll result...
So it should still be open...
So it should still be open...
Edasich- Saturn-Mass
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Re: A Brown Dwarf Main Topic
by Lazarus on Wed Dec 17, 2008 4:29 pm
Well since you have proposed this, perhaps you could answer some of the questions I raised about how to deal with the borderline topics.
And here's another one: should the recent HW Virginis detection have been filed under the "planets" category (as planet+superplanet system), the "brown dwarfs" category (as sub-brown dwarf+brown dwarf), or perhaps both categories, or what?
And here's another one: should the recent HW Virginis detection have been filed under the "planets" category (as planet+superplanet system), the "brown dwarfs" category (as sub-brown dwarf+brown dwarf), or perhaps both categories, or what?
Lazarus- Jovian
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Re: A Brown Dwarf Main Topic
by Edasich on Wed Dec 17, 2008 5:51 pm
Touchè. 
Probably neither astrophysics are able to give a feasible limit for planet-brown dwarf at the moment. Usually the limit is put at 13-15 Jupiter masses.
However I think an object with more than 20 Jupiter masses should lay in "brown dwarf" regime. HW Vir c (or D, whatever) could just be in the middle. HD 162020 b could be a superplanet.
Perhaps.
Probably neither astrophysics are able to give a feasible limit for planet-brown dwarf at the moment. Usually the limit is put at 13-15 Jupiter masses.
However I think an object with more than 20 Jupiter masses should lay in "brown dwarf" regime. HW Vir c (or D, whatever) could just be in the middle. HD 162020 b could be a superplanet.
Perhaps.
Edasich- Saturn-Mass
- Number of posts: 489
Age: 25
Location: Tau Ceti d - Northern hemisphere
Registration date: 2008-06-02 -
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