List of brown dwarfs

From Wikipedia, the free encyclopedia

The first free-floating brown dwarf discovered is Teide 1 in 1995. The first brown dwarf discovered that orbits a star is Gliese 229B, also discovered in 1995. The first brown dwarf to have a planet is 2M1207, discovered in 2004.

Since a brown dwarf mass is between a planet and star, it is also called planetar or hyperjovian. The designation starts with lower case 'b' or upper case 'B' if the brown dwarf orbit the parent primaries.

The following is the list of 38 brown dwarfs out of 608 total brown dwarfs. Although some extrasolar planets can turn to brown dwarfs since most have only minimum masses because their inclination of the orbit is not known. The more massive the extrasolar planet is, the more likely it’ll turn to brown dwarf. Examples include HD 114762 b (>11.68 M_J), Pi Mensae b (>10.312 M_J), HD 136118 b (>11.99 M_J), and NGC 2423-3 b (>10.6 M_J).

1 Normal stars
2 Field brown dwarfs
3 Unconfirmed brown dwarfs
4 See also
5 External links

[edit] Normal stars

The following contain 31 brown dwarfs in the list orbiting the normal stars. This list is incomplete.

Sorted by increasing right ascension of the parent star. Brown dwarfs within a system sorted by increasing orbital period.

Star	Constellation	Right ascension	Declination	Distance (ly)	Spectral type	Brown dwarf	Mass (M_J)	Orbital period (d)	Semimajor axis (AU)	Orbital eccentricity	Inclination (°)	Discovery year
HD 8673	Andromeda	01^h 26^m 09^s	+34° 34′ 47″	124.75	F7V	b	14	639	1.58			2005
HD 13189	Triangulum	02^h 09^m 40^s	+32° 18′ 59″	603.4	K2II	b	14	471.6	1.85	0.28		2005
HD 18445	Fornax	02^h 57^m 13^s	–24° 58′ 30″	83.92	K2V	b	39	554.67	0.9	0.54		1991
BD-04 782	Eridanus	04^h 15^m 10^s	–04° 25′ 06″	66.6	K5V	b	21	240.92	0.7	0.28		1996
HD 283750	Taurus	04^h 36^m 48^s	+27° 08′ 00″	53.81	K2V	b	50	1.79	0.025	0.02		1996
HD 29587	Perseus	04^h 41^m 34^s	+42° 07′ 25″	146.77	G2V	b	40	1471.7	2.5	0.37		1996
HD 38529 A	Orion	05^h 46^m 34^s	+01° 10′ 05″	138	G4IV	c	37	2174.3	3.68	0.36	160	2002
HD 41004 B	Pictor	05^h 59^m 50^s	–48° 14′ 23″	139	M2	b	18.4	1.3283	0.0177	0.081		2004
Gliese 229	Lepus	06^h 10^m 35^s	–21° 51′ 42″	19	M1V	B	40	200 y	40			1995
AB Pictoris	Pictor	06^h 19^m 12^s	–58° 03′ 15″	149	K2V	b	13.5		275			2005
Tau Geminorum	Gemini	07^h 11^m 08^s	+30° 14′ 43″	302	K2III	b	18.1	305				2004
G 196-3	Ursa Major	10^h 04^m 22^s	+50° 23′ 23″	50.2	M2.5	b	25		300			1998
HD 89707	Hydra	10^h 20^m 50^s	–15° 28′ 48″	81.54	G1V	b	54	298.25		0.95		1991
ChaHα8	Chamaeleon	11^h 07^m 48^s	−77° 40′ 08″	522	M6.5	b	18	1590.9	1	0.49		2007
HD 98230	Ursa Major	11^h 18^m 12^s	+31° 32′ 15″	25.11	F8.5V	b	37	3.98	0.06	0		1931
CD-33 7795	Hydra	11^h 31^m 55^s	–34° 36′ 17″	163.08	M1	b	20		100			1998
NGC 4349-127	Crux	12^h 24^m 08^s	−61° 52′ 18″	7097		b	19.8	677.8	2.38	0.19		2007
HD 110833	Canes Venatici	12^h 44^m 16^s	+51° 45′ 40″	55.44	K3V	b	17	270.04	0.8	0.69		1996
HD 112758	Virgo	12^h 59^m 03^s	–09° 50′ 03″	53.81	K0V	b	35	103.22	0.35	0.16		1996
HD 140913	Corona Borealis	15^h 45^m 07^s	+28° 28′ 12″	156.42	G0V	b	46	147.94	0.54	0.61		1996
GQ Lupi	Lupus	15^h 49^m 12^s	–35° 39′ 03″	400	K7eV	b	1-42		103			2005
HD 162020	Scorpius	17^h 50^m 38^s	–40° 19′ 06″	101.95	K2V	b	13.73	8.428198	0.072	0.277		2000
Nu Ophiuchi	Ophiuchus	17^h 59^m 01^s	−09° 46′ 25″	152.8	K0III	b	21.9	536				2004
HD 164427	Telescopium	18^h 04^m 43^s	−59° 12′ 35″	127.52	G4IV	b	46	108.55	0.46	0.55		2000
HD 168443	Serpens	18^h 20^m 04^s	–09° 35′ 34″	123.5	G5	c	34	1739.5	2.87	0.228	150	2001
SCR 1845-6357	Pavo	18^h 45^m 03^s	−63° 57′ 48″	12.57	M8.5V	B	9-65		4.5			2006
15 Sagittae	Sagitta	20^h 04^m 06^s	+17° 04′ 13″	57.7	G1V	B	65		14			2002
HD 202206	Capricornus	21^h 14^m 58^s	–20° 47′ 20″	151.14	G6V	b	17.4	255.87	0.83	0.435		2000
Epsilon Indi	Indus	22^h 03^m 22^s	–56° 47′ 09″	11.8	K5V	Bb	28	15 y	2.65			2003
Epsilon Indi	Indus	22^h 03^m 22^s	–56° 47′ 09″	11.8	K5V	Ba	47	1459 y				2003
HD 217580	Aquarius	23^h 01^m 52^s	–03° 50′ 55″	58.7	K4V	b	60	454.66	1	0.52		1994
COROT-Exo-3					G0V	b	20.2	4.25	0.052			2008

[edit] Field brown dwarfs

The following has 2 field brown dwarfs, which do not orbit the stellar objects. This list is incomplete.

Sorted by increasing right ascension of the parent star. Brown dwarfs within a system sorted by increasing orbital period.

Brown dwarf	Constellation	Right ascension	Declination	Distance (ly)	Spectral type	Mass (M_J)	Discovery year
Teide 1	Taurus	03^h 47^m 18^s	+24° 22′ 31″	380	M8	55	1995
OTS 44	Chamaeleon	11^h 10^m 12^s	–76° 32′ 13″	554	M9.5V	15

[edit] Unconfirmed brown dwarfs

There are 6 unconfirmed brown dwarfs, which are not 100% certain that brown dwarfs really exist. This list is incomplete.

Sorted by increasing right ascension of the parent star. Brown dwarfs within a system sorted by increasing orbital period.

Star	Constellation	Right ascension	Declination	Distance (ly)	Spectral type	Brown dwarf	Mass (M_J)	Orbital period (d)	Semimajor axis (AU)	Orbital eccentricity	Inclination (°)	Discovery year
Gliese 22 B	Cassiopeia	00^h 32^m 27^s	+67° 14′ 09″	326	M2.5V	b	16	~5500		0		2008
HD 3346	Andromeda	00^h 36^m 46^s	+44° 29′ 19″	655.58	K5III	c	60	650	2.5			1996
OGLE-TR-109	Carina	10^h 53^m 41^s	–61° 25′ 15″	8450		b	<14	0.589128	0.016		77	2002
HD 100546	Musca	11^h 33^m 25^s	–70° 11′ 41″	337.25	B9Vne	b	20		6.5?
HD 104304	Virgo	12^h 00^m 44^s	−10° 26′ 46″	42.1	G9	b	17.2	2752		0.38		2007
CM Draconis	Draco	16^h 34^m 27^s	+57° 09′ 00″	48	M4	b	64	73	0.27			1998

[edit] See also

[edit] External links

Extrasolar Visions: Brown dwarfs. Retrieved on 2007-07-25.
Interactive Extrasolar-Planets Catalogue. Retrieved on 2007-07-25.

Categories: Brown dwarfs | Lists of stars | Binary stars | Multiple stars | Planetary systems

List of brown dwarfs

From Wikipedia, the free encyclopedia

Contents

[edit] Normal stars

[edit] Field brown dwarfs

[edit] Unconfirmed brown dwarfs

[edit] See also

[edit] External links

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