PSR J1930–1852

PSR J1930–1852
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
Distance1500 pc[2]
Details[2]: 4 
PSR J1930–1852 A
Mass≤1.32 M☉
Rotation185.52016047926(8) ms
Age163 Myr
PSR J0952–0607 B
Mass≥1.30 M☉
Orbit[2]: 3 
PrimaryPSR J1930–1852 A
CompanionPSR 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
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.[2][3][4]

See also

Notes

  1. ^ 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 

References

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