Astronomy:QX Normae
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Short description: Active low mass X ray binary star
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 12m 43.0s[1] |
| Declination | −52° 25′ 23″ |
| Characteristics | |
| Spectral type | / |
| Astrometry | |
| Distance | 19,000 ly (58,000[2] pc) |
| Details | |
| Neutron star | |
| Mass | 1.74 ± 0.14[2] M☉ |
| Radius | 9.3 ± 1.0[2] R☉ |
| Other designations | |
4U 1608-52[1] | |
| Database references | |
| SIMBAD | data |
QX Normae is an active low mass X ray binary in the constellation Norma. It is composed of a neutron star and a star smaller and cooler than the Sun. The X-ray component, known as 4U 1608–52, was discovered in the early 1970s, while the visual component, QX Normae, was discovered in 1977.[3] By analysing the interstellar extinction between Earth and the system, Güver and colleagues calculated the most likely distance to be 5.8 kpc (19,000 light-years), and the neutron star's mass to be 1.74 ± 0.14 times that of the Sun and radius to be a mere 9.3 ± 1.0 km.[2]
References
- ↑ 1.0 1.1 "QX Normae". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=QX+Normae.
- ↑ 2.0 2.1 2.2 2.3 Güver, Tolga; Özel, Feryal; Cabrera-Lavers, Antonio; Wroblewski, Patricia (2010). "The Distance, Mass, and Radius of the Neutron Star in 4U 1608-52". The Astrophysical Journal 712 (2): 964–73. doi:10.1088/0004-637X/712/2/964. Bibcode: 2010ApJ...712..964G.
- ↑ Wachter, Stephanie; Hoard, D. W.; Bailyn, Charles D.; Corbel, Stephane; Kaaret, Philip E. (2002). "A Closer Look at the Soft X-ray Transient X1608-52 : Long-term Optical\/X-ray Observations". The Astrophysical Journal 568 (2): 901–911. doi:10.1086/339034. Bibcode: 2002ApJ...568..901W.
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