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PSR J1930–1852

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Binary pulsar–neutron star system

PSR J1930–1852
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sagittarius
Right ascension 19 30 29.716
Declination –18° 51′ 46.27″
Characteristics
Spectral type Pulsar + Neutron star
Astrometry
Distance1500 pc
Details
PSR J1930–1852 A
Mass≤1.32 M
Rotation185.52016047926(8) ms
Age163 Myr
PSR J0952–0607 B
Mass≥1.30 M
Orbit
PrimaryPSR J1930–1852 A
CompanionPSR J1930–1852 B
Period (P)45.0600007(5) d
Semi-major axis (a)50900000 km (mean separation)
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
SIMBADdata

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.

See also

Notes

  1. Orbital separation distance (semi-major axis from primary) calculated with Kepler's Third Law: a = G M T 2 4 π 2 3 {\displaystyle a={\sqrt{\frac {GMT^{2}}{4\pi ^{2}}}}} given total system mass M {\displaystyle M} = 2.59 M and orbital period T {\displaystyle T} = 45.0600007 d. Swiggum et al. (2015) determined a minimum projected semi-major axis of 86.890277(7) light seconds (26049049(2) km) from radio pulsation timing.

References

  1. ^ "PSR J1930-1852 -- Pulsar". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 3 March 2023.
  2. ^ 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.
  3. 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.
  4. 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.
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