PSR B1259-63/LS 2883

LS 2883
Observation data
Epoch J2000      Equinox J2000
Constellation Crux
Right ascension 13h 02m 47.655s[1]
Declination –63° 50′ 08.67″[1]
Apparent magnitude (V) 10.34
Characteristics
Spectral type O9.5Ve[2] + pulsar
Astrometry
Proper motion (μ) RA: −6.0[1] mas/yr
Dec.: −5.7[1] mas/yr
Distance7,500[3] ly
Orbit[4]
CompanionSS 2883
Period (P)1237 days
Eccentricity (e)0.87
Inclination (i)36°
Other designations
AAVSO 1256-63, ALS 2883, AX J1302-638, CPD-63° 2495, GSC 08997-01597, Hbg 757, Hen 3-852, INTREF 538, LS 2883, MSX6C G304.1845-00.9916, PSR J1302-6350, THA 17-8, TYC 8997-1597-1, UCAC2 3710789, WRAY 15-1053.[5]
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-long eclipse each time the pulsar passes behind the star.[4] 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.[6]

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.[4]

References

  1. 1 2 3 4 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H.
  2. ↑ Chernyakova, M.; et al. (March 2014). "Multiwavelength observations of the binary system PSR B1259-63/LS 2883 around the 2010-2011 periastron passage". Monthly Notices of the Royal Astronomical Society. 439 (1): 432−445. arXiv:1401.1386Freely accessible. Bibcode:2014MNRAS.439..432C. doi:10.1093/mnras/stu021.
  3. ↑ Universidad de Barcelona (May 2, 2011). "Discovery of Structure of Radio Source from a Pulsar Orbiting a Massive Star". ScienceDaily.
  4. 1 2 3 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/0403612Freely accessible. Bibcode:2004MNRAS.351..599W. doi:10.1111/j.1365-2966.2004.07806.x.
  5. ↑ "TYC 8997-1597-1 -- Pulsar". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2009-01-06.
  6. ↑ 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/0506280Freely accessible. Bibcode:2005A&A...442....1A. doi:10.1051/0004-6361:20052983.

External links


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