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physical object > natural object > celestial body > star > dwarf > brown dwarf
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brown dwarf
subjectfact 
brown dwarfhas mass 1 to 8 percent of the Sunhas source: Croswell, K. 1995 The Alchemy of the Heavens, Anchor Books, 2001-09-27 09:30:52.0
has definition Star with too little mass to ignite its hydrogen 1 fuel. If brown dwarfs exist, they shine faint red for a time, as they convert gravitational energy into heat, and then fade and cool.has source: Croswell, K. 1995 The Alchemy of the Heavens, Anchor Books, 2001-09-27 09:30:52.0
has definition A substellar object that is below the minimum mass required for nuclear fusion reactions to occur in its core.has source: Hawley, J.F., Halcomb, K.H. 1998 Foundations of Modern Cosmology, Oxford University Press, 2001-09-27 09:30:52.0
has definition A self-gravitating, self-luminous gaseous object which is not sufficiently massive to result in thermonuclear hydrogen fusion reactions in its core and cannot therefore be considered a star. Such objects are expected to have a mass less than 7% of the Sun's mass and represent a "missing link" between low-mass stars and gas giant planets like Jupiter (at 0.1% of the Sun's mass).has source: McLean, I.S. 1997 Electronic Imaging in Astronomy, Wiley, 2001-09-27 09:30:52.0
is a kind of dwarf2001-09-27 09:30:52.0
is a kind of massive compact halo object2001-09-27 09:30:52.0
dwarfhas symbol d2001-09-27 09:30:52.0
has luminosity class V2001-09-27 09:30:52.0
has synonym main sequence star2001-09-27 09:30:52.0
massive compact halo objectis a part of halo2001-09-27 09:28:17.0
has acronym MACHO2001-09-27 09:28:17.0
starhas star surface temperature2001-09-27 09:30:25.0
has spectral type2001-09-27 09:30:25.0
has V magnitude2001-09-27 09:30:25.0
has B magnitude2001-09-27 09:30:25.0
has U magnitude2001-09-27 09:30:25.0
has position on celestial sphere from the point of view of Earth2001-09-27 09:30:25.0
has parallax from the point of view of Earth's orbit2001-09-27 09:30:25.0
has proper motion2001-09-27 09:30:24.0
has radiation at surface which is diffused out from the hotter core2001-09-27 09:30:24.0
has energy source gravitational contraction and or fusion2001-09-27 09:30:24.0
has energy production which takes place primarily within the core2001-09-27 09:30:24.0
has surface density which depends on luminosity class2001-09-27 09:30:24.0
has surface temperature greater than 1000 Kelvin2001-09-27 09:30:24.0
has apparent magnitude2001-09-27 09:30:25.0
has absolute magnitude2001-09-27 09:30:25.0
has age2001-09-27 09:30:25.0
has catalog star catalog2001-09-27 09:30:25.0
has material hydrogen, helium2001-09-27 09:30:24.0
has velocity determined from proper motion and radial velocity2001-09-27 09:30:25.0
dark matteris a part of dark halo2001-09-27 09:32:18.0
celestial bodyhas spectra2001-09-27 09:30:09.0
hypothetical particlehas acceptance status hypothetical2001-09-27 09:28:16.0
particleobeys uncertainty principle2001-09-27 09:28:02.0
has frequency inversely proportional to the wavelength2001-09-27 09:28:02.0
has wavelength inversely proportional to its momentum2001-09-27 09:28:02.0
has charge2001-09-27 09:28:01.0
physical objecthas location or center of gravity2001-09-27 09:27:27.0
has angular momentum2001-09-27 09:27:27.0
has momentum2001-09-27 09:27:27.0
has temperature2001-09-27 09:27:27.0
has volume2001-09-27 09:27:27.0
has extent2001-09-27 09:27:27.0

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