Talk:Sub-brown dwarf

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(inserted for readability Rursus dixit. (^mbork³!) 16:59, 6 March 2011 (UTC))

Hello the reference I gave is only one example. It may not say the word sub-brown dwarf but that's what many call free floating objects and free floating objects they thought were totally free but like these binaries turn out to be mutually orbiting other objects. The IAU calls free-floating planemos, sub-brown dwarfs. User:Yisraelasper —Preceding unsigned comment added by Yisraelasper (talk • contribs) 11:26, 1 January 2008 (UTC)

I think there's lots of confusion regarding "planets". As regards to IAU, they've not done any important contribution to terminology outside the solar system, so we can simply stick to the terms that the scientists independently coin themselves. "Planemo" just means "planetary mass object" no less no more. Any super-jovian planet, lesser planet and other "SSSB sized boulders" out there may actually be called "sub-brown dwarfs", but since there's already the term "planet" commonly used for bodies of size Jupiter or less, I guess the common practice will become to use "sub-brown dwarfs" as a technical term for super-jovian planets. ... said: Rursus (bork²) 22:00, 14 January 2009 (UTC)

Not in source provided

The article claims:

A sub-brown dwarf is a gas giant that is not orbiting a star...

which is not in source provided. The source claims that a "sub-brown dwarf" is a free-floating object, with mass less than 13 Jupiter masses, giving the additional "(or whatever name is appropriate)". Such as f.ex. a blob of gooey matter is a "sub-brown dwarf (or whatever name is appropriate)".

First: gas giant points to planets. Rursus dixit. (^mbork³!) 17:04, 6 March 2011 (UTC)

Spectral class?

What (stellar) spectral classes can a sub-brown dwarf have, if this concept applies here at all? I would have expected Y "or below", but ULAS J003402.77−005206.7 is a possible SBD of spectral class T9. Vice versa, can "proper" (deuterium-burning) brown dwarfs have spectral class Y?--Roentgenium111 (talk) 21:46, 11 October 2011 (UTC)

Proposed three-way merger - Not agreed - Other two merged

I have proposed a three-way merger between this article, free-floating planet, and rogue planet. See the rogue planet talk page for discussion. Kevin Nelson (talk) 10:13, 29 November 2011 (UTC)

I have merged "Rogue planet" and "Free-floating planet" under Rogue planet, see Talk:Free-floating planet for more info. — Preceding unsigned comment added by Cliff12345 (talk • contribs) 12:44, 15 May 2012 (UTC)

This article is duplicative

This article should be removed because it basically states the same thing as the Rogue Planet page, and also because this term "sub-brown dwarf" is not used in research papers. The objects referenced on this page are generally described in research papers as "Free Floating Planetary Mass Objects". The Rogue Planet page does a much better job defining these types of objects. Your thoughts? Martin Cash (talk) 20:36, 25 February 2014 (UTC)

"sub-brown dwarf" could be describing some infrared observations - whereas "planetary mass object" might relate to microlensing observations. If so, the different techniques (and hypothetical objects) could be discussed in separate articles ? - Rod57 (talk) 15:40, 26 October 2021 (UTC)

Renewal of previously proposed merger

I would like to suggest to merge the pages Sub-brown dwarf and Rogue planet.

Sub-brown dwarfs and rogue planets are essentially the same thing. This is corraborated twice in [3]. Once in section 4 'Future': ' At the end of item (3), the text: “sub-brown dwarfs” (or whatever name is most appropriate) should be updated to the currently accepted term “free-floating planetary mass objects”.' And even more clear in section 2.6.: 'For planetary mass objects that do not orbit around a more massive central object, the term “sub-brown dwarf” has not been adopted in the usage by the community; rather, these objects are often referred to as “free floating planetary mass objects”. These two terms are nowadays considered as synonymous'.

Please see the discussion at Talk:List of largest exoplanets for more details. Stevinger (talk) 12:05, 8 August 2024 (UTC)