Astronomy:PSR J1930–1852
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Short description: Binary pulsar–neutron star system
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h 30m 29.716s[1] |
| Declination | –18° 51′ 46.27″[1] |
| Characteristics | |
| Spectral type | Pulsar + Neutron star |
| Astrometry | |
| Distance | 1500 pc |
| Details[2](p4) | |
| PSR J1930–1852 A | |
| Mass | ≤1.32 M☉ |
| Rotation | 185.52016047926(8) ms |
| Age | 163 Myr |
| PSR J0952–0607 B | |
| Mass | ≥1.30 M☉ |
| Orbit[2](p3) | |
| Primary | PSR J1930–1852 A |
| Companion | PSR J1930–1852 B |
| Period (P) | 45.0600007(5) d |
| Semi-major axis (a) | 50900000 km (mean separation)[lower-alpha 1] |
| Eccentricity (e) | 0.39886340(17) |
| Periastron epoch (T) | JD 2456527.142330(3) 22 August 2013 15:24:57 UTC |
| Other designations | |
PSR J1930–1852 | |
| Database references | |
| SIMBAD | data |
PSR J1930–1852 is a binary pulsar system, composed of a pulsar and a neutron star and orbiting around their common center of mass. Located 4,900 light-years (1,500 pc) away from Earth in the constellation Sagittarius, it is the most distantly-separated double neutron star system known.[2][3][4]
See also
- Hulse–Taylor binary, first pulsar in a binary system discovered
- PSR J0737−3039, first double pulsar binary system discovered
- PSR J1946+2052, double neutron star system with the shortest known orbital period
Notes
- ↑ Orbital separation distance (semi-major axis from primary) calculated with Kepler's Third Law: [math]\displaystyle{ a = \sqrt[3]{\frac{GMT^2}{4\pi^2}} }[/math] given total system mass [math]\displaystyle{ M }[/math] = 2.59 M☉ and orbital period [math]\displaystyle{ T }[/math] = 45.0600007 d.[2](p3) Swiggum et al. (2015) determined a minimum projected semi-major axis of 86.890277(7) light seconds (26049049(2) km) from radio pulsation timing.[2](p3)
References
- ↑ 1.0 1.1 "PSR J1930-1852 -- Pulsar". SIMBAD. Centre de données astronomiques de Strasbourg. https://simbad.u-strasbg.fr/simbad/sim-id?Ident=PSR+J1930-1852. Retrieved 3 Mar 2023.
- ↑ 2.0 2.1 2.2 2.3 2.4 Swiggum, J. K.Expression error: Unrecognized word "etal". (June 2015). "PSR J1930-1852: a Pulsar in the Widest Known Orbit around Another Neutron Star". The Astrophysical Journal 805 (2): 7. doi:10.1088/0004-637X/805/2/156. 156. Bibcode: 2015ApJ...805..156S.
- ↑ Blue, Charles (10 May 2015). "Schreyer Scholar credited with co-discovery of new pulsar: Never-before-seen star found during NSF-funded educational outreach program". Eberly College of Science (Penn State University). https://science.psu.edu/news/schreyer-scholar-credited-co-discovery-new-pulsar-never-seen-star-found-during-nsf-funded. Retrieved 3 March 2023.
- ↑ Yong, Shao; Xiang-Dong, Li (January 2016). "Formation of the Double Neutron Star System PSR J1930-1852". The Astrophysical Journal 816 (1): 3. doi:10.3847/0004-637X/816/1/45. 45. Bibcode: 2016ApJ...816...45S.
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