List of neutron stars

Neutron stars are the collapsed cores of supergiant stars.^[1] They are created as a result of supernovas and gravitational collapse,^[2] and are the second-smallest and densest class of stellar objects.^[3] In the cores of these stars, protons and electrons combine to form neutrons.^[2] Neutron stars can be classified as pulsars if they are magnetized, if they rotate, and if they emit beams of electromagnetic radiation out of their magnetic poles.^[4] They may include soft gamma repeaters (SGR) and radio-quiet neutron stars, as well as pulsars such as radio pulsars, recycled pulsars, low mass X-ray pulsars, and accretion-powered pulsars. A notable grouping of neutron stars includes the Magnificent Seven.

Zooming to RX J1856.5−3754 which is one of the Magnificent Seven and, at a distance of about 400 light-years, the closest-known neutron star

List of neutron stars

Caption text

Designation	Popular name	Type	Constellation	Right ascension	Declination	Distance (pc)	Mass (M☉)	Radius (km)	Spin period (sec)	Temperature) (K)	Notes
SGR 1806−20		Magnetar	Sagittarius	18h 08m 39.32s	−20° 24' 39.5"	13,000			7.55592
RCW 103		Radio-quiet	Norma	16h 17m 33.000s	−51° 02' 00.00"	3,100-3,300
1RXS J141256.0+792204	Calvera	Radio-quiet	Ursa Minor	14h 12m 55.867s	+79° 22' 03.895"	≤2,000			0.059199071070
RX J0822−4300	Cosmic Cannonball	Radio-quiet	Puppis	08h 23m 8.16s	−42° 41′ 41.4″	2,000
PSR B1937+21		Pulsar	Vulpecula	19h 39m 38.560210s	+21° 34′ 59.14166″	>3,600			0.0015578065
RX J1856.5−3754			Corona Australis	18h 56m 35s	−37° 54′ 36″	122	1.5	12.1			The Magnificent Seven
RBS1556											The Magnificent Seven
RBS1223											The Magnificent Seven
RX J0720.4−3125			Canis Major	07h 20m 24.961s	−31° 25′ 50.21″	360		4.50 - 5.38			The Magnificent Seven
RX J0420.0-5022											The Magnificent Seven
PSR B1937+21		Pulsar	Vulpecula	19h 39m 38.560210s	+21° 34′ 59.14166″	3,600			0.0015578065		First-discovered millisecond pulsar
PSR B1957+20	Black Widow Pulsar	Eclipsing binary pulsar	Sagitta	19h 59m 36.77s	+20° 48′ 15.12″	2000	1.66 - 1.8		0.00160734
PSR B0531+21	Crab Pulsar	Pulsar	Taurus	05h 34m 31.95s	+22° 00′ 52.2″	1,900		10	0.0335028583
PSR B1509−58		Pulsar	Circinus	15h 13m 55.52s	−59° 08′ 08.8″	5,200 ±1,400		9.5	0.1502
PSR B0329+54		Pulsar	Camelopardalis	03h 32m 59.368s	+54° 34′ 43.57″	1,060			0.71452
PSR B0943+10		Pulsar	Leo	09h 46m 7.31s	+09° 51′ 57.3″	630 ±100	1.5		1.1	3,100,000
PSR B1257+12	Lich	Pulsar	Virgo	13h 00m 01s	+12° 40′ 57″	710 ±40			0.006219		Host to the first-discovered extrasolar and pulsar planets
PSR B1620−26		Pulsar	Scorpius	16h 23m 38.2218s	−26° 31′ 53.769"	3,800	1.35	20.85		≤ 30,000	Binary with a white dwarf
PSR B1828−11		Pulsar	Scutum	18h 30m 47.75s	−10° 59′ 10.8″	3,200
PSR B1919+21	Little Green Men	Pulsar	Vulpecula	19h 21m 44.815s	+21° 53′ 02.25"	100-1100	1.4	9.7398	1.3373		First-discovered radio pulsar
PSR J0348+0432		Pulsar	Taurus	03h 48m 43.639s	+04° 32′ 11.458″	2,100	2.01	13 ±2	0.0391226569017806		Binary with a white dwarf
PSR J0737−3039A		Double pulsar	Puppis	07h 37m 51.248s	−30° 39′ 40.83″	1150	1.338		0.022699379740922		First-known double pulsar
PSR J0737−3039B		Double pulsar	Puppis	07h 37m 51.248s	−30° 39′ 40.83″	1150	1.249		2.7734613485		First-known double pulsar
PSR J0740+6620		Pulsar	Camelopardalis	07h 40m 45.799s	+66° 20′ 33.60″	1,410	2.08	12.39			Binary with a white dwarf
PSR J0952–0607		Black Widow Pulsar	Sextans	09h 52m 08.319s	−06° 07′ 23.49″	970, 1720, or 6260	2.35		0.00141379836		Fastest spinning pulsar known within the Milky Way
PSR J1311–3430		Pulsar	Centaurus	13h 11m 45.724s	−34° 30′ 30.35″		2.7		0.0025
PSR J1614−2230		Pulsar	Scorpius	16h 14m 36.5051s	−22° 30′ 31.081″	1,200	1.908	13 ±2	0.0031508076534271		Binary with a white dwarf
PSR J1719−1438		Pulsar	Serpens	17:19:10.0730(1)	−14:38:00.96(2)	1,200	1.4	19	0.0058
PSR J1748-2021B		Pulsar	Virgo	17h 48m 52.9522s	−20h 21m 38.90s	223	2.548
PSR J1946+2052A		Pulsar	Vulpecula	19h 46m 14.130s	+20° 52′ 24.64″	3500 - 4200	<1.31		0.0169601753230
PSR J1946+2052A		Neutron star	Vulpecula	19h 46m 14.130s	+20° 52′ 24.64″	3500 - 4200	>1.18
PSR J2124−3358		Pulsar	Microscopium	21h 24m 43.8464s	−33° 58′ 44.961″	270
PSR J0835-4510	Vela Pulsar	Pulsar	Vela	08h 35m 20.65525s	−45° 10′ 35.1545″	294			0.08933

Anomalous X-ray pulsars

• Anomalous X-ray pulsar (AXP)
• AXP 1E 1048-59
• AXP 1E2259+586
• AXP4U 0142+61
• AXP 1RXS 1708–40
• AXP 1E 1841–045
• AXP AXJ1844-0258
• AXP CXJ0110-7211
• Vela X-1
• 4U 0352+309
• Bursting Pulsar
• Vela Junior
• LMC N49

Binary star systems

• Intermediate-mass X-ray binary
• High-mass X-ray binaries
• Centaurus X-3
• Circinus X-1
• GX 301-2
• Hercules X-1

Related objects

• Kesteven 79
• PSR B1620−26 b
• 3C 58
• Cas X-1
• GW170817
• Cygnus Loop
• Spaghetti Nebula
• SN 1987A
• Jellyfish Nebula

See also

• Stellar designations and names