PSR B1259-63/LS 2883

PSR B1259-63
Observation data
Epoch J2000      Equinox J2000
Constellation Crux
Right ascension 13h 02m 47.65s[1]
Declination –63° 50′ 08.7″[1]
Astrometry
Proper motion (μ) RA: -2.90[1] mas/yr
Dec.: -6.40[1] mas/yr
Absolute magnitude (MV)10.68
Distance Approx. 7500 ly.[2]
Orbit[3]
CompanionSS 2883
Period (P)1237 days
Eccentricity (e)0.87
Inclination (i)36°
Other designations
TYC 8997-1597-1, Hbg 757, PSR J1302-6350, ALS 2883, Hen 3-852, THA 17-8, AX J1302-638, INTREF 538, UCAC2 3710789, AAVSO 1256-63, CPD-63° 2495, LS 2883, MSX6C G304.1845-00.9916, WRAY 15-1053, GSC 08997-01597.[1]
Database references
SIMBADdata

PSR B1259-63 is a pulsar and member of an eclipsing binary star system with the blue B2e-class star SS 2883. The pair has an eccentric orbit that is inclined to the line of sight from Earth by about 36°, leading to a 40 day eclipse each time the pulsar passes behind the star.[3] The pulsar has a period of about 48 ms and a luminosity of 8.3 × 1035 erg/s. It emits very high energy gamma rays that vary on a time scale of several days.[4]

The star SS 2883 has about 10 solar masses and is 6 solar radii in size. The rate of rotation is about 280 km/s at the equator, or 70% of the breakup velocity.[3]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 "TYC 8997-1597-1 -- Pulsar". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2009-01-06.
  2. ↑ ScienceDaily Discovery of Structure of Radio Source from a Pulsar Orbiting a Massive Star
  3. ↑ 3.0 3.1 3.2 Wang N.; Johnston S.; Manchester R. N. (June 2004). "13 years of timing of PSR B1259-63". Monthly Notices of the Royal Astronomical Society 351 (2): 599–606. arXiv:astro-ph/0403612. Bibcode:2004MNRAS.351..599W. doi:10.1111/j.1365-2966.2004.07806.x.
  4. ↑ Aharonian, F. et al. (2005). "Discovery of the Binary Pulsar PSR B1259-63 in Very-High-Energy Gamma Rays around Periastron with H.E.S.S.". Astronomy & Astrophysics 442: 1–10. arXiv:astro-ph/0506280. Bibcode:2005A&A...442....1A. doi:10.1051/0004-6361:20052983.

External links