Astronomical objects
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
Neutron stars are the collapsed cores of supergiant stars. They are created as a result of supernovas and gravitational collapse, and are the second-smallest and densest class of stellar objects. In the cores of these stars, protons and electrons combine to form neutrons. 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 . 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 .
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
Binary star systems
Related objects
See also
References
Heger, A.; Fryer, C. L.; Woosley, S. E.; Langer, N.; Hartmann, D. H. (2003). "How Massive Single Stars End Their Life". Astrophysical Journal . 591 (1): 288–300. arXiv :astro-ph/0212469 . Bibcode :2003ApJ...591..288H . doi :10.1086/375341 . S2CID 59065632 .
^ "Imagine the Universe!: Neutron Stars" . National Aeronautics and Space Administration - Goddard Space Flight Center . 23 September 2023. Retrieved 7 January 2024.
Glendenning, Norman K. (2012). Compact Stars: Nuclear Physics, Particle Physics and General Relativity (illustrated ed.). Springer Science & Business Media. p. 1. ISBN 978-1-4684-0491-3 . Archived from the original on 2017-01-31. Retrieved 2016-03-21.
Kazmierczak, Jeanette (12 December 2019). "NASA's NICER Delivers Best-ever Pulsar Measurements, 1st Surface Map" . nasa.gov . Retrieved 21 December 2024.
Neutron star Types
Single pulsars
Binary pulsars
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