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]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| 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[2] |
| Details[2]: 4 | |
| 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]: 3 | |
| Primary | PSR J1930–1852 A |
| Companion | PSR J1930–1852 B |
| Period (P) | 45.0600007(5) d |
| Semi-major axis (a) | 50900000 km (mean separation)[a] |
| 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 |
See also edit
- 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 edit
- ^ Orbital separation distance (semi-major axis from primary) calculated with Kepler's Third Law: given total system mass = 2.59 M☉ and orbital period = 45.0600007 d.[2]: 3 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]: 3
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References edit
- ^ a b "PSR J1930-1852 -- Pulsar". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 3 March 2023.
- ^ a b c d e f Swiggum, J. K.; Rosen, R.; McLaughlin, M. A.; Lorimer, D. R.; Heatherly, S.; Lynch, R.; et al. (June 2015). "PSR J1930-1852: a Pulsar in the Widest Known Orbit around Another Neutron Star". The Astrophysical Journal. 805 (2): 7. arXiv:1503.06276. Bibcode:2015ApJ...805..156S. doi:10.1088/0004-637X/805/2/156. 156.
- ^ 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. 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. arXiv:1512.02785. Bibcode:2016ApJ...816...45S. doi:10.3847/0004-637X/816/1/45. 45.