# Central compact object

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A **central compact object** (**CCO**) is an [x-ray](/source/X-ray) [source](/source/Point_source) found near the center of a young, nearby [supernova remnant](/source/Supernova_remnant) (SNR). Given the x-ray [flux](/source/Radiative_flux) and [spectra](/source/X-ray_spectroscopy) of these [compact objects](/source/Compact_object), the almost certain conclusion is that CCOs are remnant [neutron stars](/source/Neutron_star) associated with recent [supernovae](/source/Supernova). Unlike most [pulsars](/source/Pulsar), CCOs generally [lack pulsed radio emission](/source/Radio-quiet_neutron_star) or variation in the observed x-rays due to such phenomena being either nonexistent or difficult to detect. The weaker [magnetic fields](/source/Magnetic_field) than most other detected neutron stars means that most of the detected x-rays are due to [blackbody radiation](/source/Blackbody_radiation). Confirmation that the CCO is associated with the past supernova can be done using the [kinematics](/source/Kinematics) of the objects and matching them to the age and kinematics of the host SNR.[1]

The detection in 1980 of [1E 161348-5055](/source/1E_161348-5055) at the center of SNR [RCW 103](/source/RCW_103) using the [Einstein Observatory](/source/Einstein_Observatory)[2] was once touted as the first CCO discovery, but is now classified as a slow-rotating [magnetar](/source/Magnetar) due to magnetar outburst detection.[3] Since that object's discovery, ten CCOs have been positively identified with a further two as candidates.[4]

## List of CCOs

The following list of confirmed CCOs and their associated supernova remnants is curated by [Andrea De Luca](/source/Andrea_De_Luca), astronomer at the [National Institute for Astrophysics](/source/National_Institute_for_Astrophysics).[3]

- [RX J0822.0-4300](/source/RX_J0822-4300) (center of [Puppis A](/source/Puppis_A)) (pulsations detected[5])
- [CXOU J085201.4-461753](/source/CXOU_J085201.4-461753) (center of [RX J0852.0−4622](/source/RX_J0852.0%E2%88%924622))
- [1E 1207.4-5209](/source/1E_1207.4-5209) (center of [PKS 1209−51/52](/source/PKS_1209%E2%88%9251/52)) (pulsations detected[6])
- [CXOU J160103.1-513353](/source/CXOU_J160103.1-513353) (center of [G330.2+1.0](/source/G330.2%2B1.0))
- [1WGA J1713.4-3949](/source/1WGA_J1713.4-3949) (center of [G347.3−0.5](/source/G347.3%E2%88%920.5))
- [XMMU J172054.5-372652](/source/XMMU_J172054.5-372652) (center of [G350.1−0.3](/source/G350.1-0.3))
- [XMMU J173203.3-344518](/source/XMMU_J173203.3-344518) (center of [G353.6−0.7](/source/G353.6%E2%88%920.7))
- [CXOU J181852.0-150213](/source/CXOU_J181852.0-150213) (center of [G15.9+0.2](/source/G15.9%2B0.2))
- [CXOU J185238.6+004020](/source/CXOU_J185238.6%2B004020) (center of [Kesteven 79](/source/Kesteven_79)) (pulsations detected[7])
- [CXOU J232327.9+584842](/source/CXOU_J232327.9%2B584842) (center of [Cassiopeia A](/source/Cassiopeia_A))

## References

1. Mayer, Martin G. F. & Becker, Werner (2021-07-01). ["A kinematic study of central compact objects and their host supernova remnants"](https://www.aanda.org/articles/aa/abs/2021/07/aa41119-21/aa41119-21.html). *Astronomy & Astrophysics*. **651**: A40. [arXiv:2106.00700](https://arxiv.org/abs/2106.00700). [Bibcode:2021A&A...651A..40M](https://ui.adsabs.harvard.edu/abs/2021A%26A...651A..40M). [doi:10.1051/0004-6361/202141119](https://doi.org/10.1051/0004-6361/202141119). [ISSN 0004-6361](https://www.worldcat.org/issn/0004-6361)

1. Tuohy, I. & Garmire, G. (1980-08-01). ["Discovery of a compact X-ray source at the center of the SNR RCW 103."](https://ui.adsabs.harvard.edu/abs/1980ApJ...239L.107T). *The Astrophysical Journal*. **239**: L107–L110. [Bibcode:1980ApJ...239L.107T](https://ui.adsabs.harvard.edu/abs/1980ApJ...239L.107T). [doi:10.1086/183303](https://doi.org/10.1086/183303). [ISSN 0004-637X](https://www.worldcat.org/issn/0004-637X)

1. De Luca, A (2017). "Central compact objects in supernova remnants". *Journal of Physics: Conference Series*. **932** (1). [arXiv:1711.07210](https://arxiv.org/abs/1711.07210). [Bibcode:2017JPhCS.932a2006D](https://ui.adsabs.harvard.edu/abs/2017JPhCS.932a2006D). [doi:10.1088/1742-6596/932/1/012006](https://doi.org/10.1088/1742-6596/932/1/012006)

1. ["\[untitled\]"](https://www.iasf-milano.inaf.it/~deluca/cco/main.htm). *www.iasf-milano.inaf.it*. Retrieved 2023-12-12.

1. Gotthelf, E. V. & Halpern, J. P. (2009-04-01). "Discovery of a 112 ms X-Ray Pulsar in Puppis A: Further Evidence of Neutron Stars Weakly Magnetized at Birth". *The Astrophysical Journal*. **695** (1): L35–L39. [arXiv:0902.3007](https://arxiv.org/abs/0902.3007). [Bibcode:2009ApJ...695L..35G](https://ui.adsabs.harvard.edu/abs/2009ApJ...695L..35G). [doi:10.1088/0004-637X/695/1/L35](https://doi.org/10.1088/0004-637X/695/1/L35). [ISSN 0004-637X](https://www.worldcat.org/issn/0004-637X)

1. Zavlin, V. E.; Pavlov, G. G.; Sanwal, D.; Trümper, J. (2000-09-01). "Discovery of 424 Millisecond Pulsations from the Radio-quiet Neutron Star in the Supernova Remnant PKS 1209-51/52". *The Astrophysical Journal*. **540** (1): L25–L28. [arXiv:astro-ph/0005548](https://arxiv.org/abs/astro-ph/0005548). [Bibcode:2000ApJ...540L..25Z](https://ui.adsabs.harvard.edu/abs/2000ApJ...540L..25Z). [doi:10.1086/312866](https://doi.org/10.1086/312866). [ISSN 0004-637X](https://www.worldcat.org/issn/0004-637X)

1. Gotthelf, E. V.; Halpern, J. P.; Seward, F. D. (2005-07-01). ["Discovery of a 105 ms X-Ray Pulsar in Kesteven 79: On the Nature of Compact Central Objects in Supernova Remnants"](https://ui.adsabs.harvard.edu/abs/2005ApJ...627..390G). *The Astrophysical Journal*. **627** (1): 390–396. [arXiv:astro-ph/0503424](https://arxiv.org/abs/astro-ph/0503424). [Bibcode:2005ApJ...627..390G](https://ui.adsabs.harvard.edu/abs/2005ApJ...627..390G). [doi:10.1086/430300](https://doi.org/10.1086/430300). [ISSN 0004-637X](https://www.worldcat.org/issn/0004-637X). [S2CID 12492328](https://api.semanticscholar.org/CorpusID:12492328)

## External links

- [List of CCOs maintained by A. De Luca](https://www.iasf-milano.inaf.it/~deluca/cco/main.htm)

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Adapted from the Wikipedia article [Central compact object](https://en.wikipedia.org/wiki/Central_compact_object) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Central_compact_object?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.