astro.wikisort.org - StarQX 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]
Active low mass X ray binary star
QX Normae
Observation data Epoch J2000 Equinox J2000 |
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 |
---|
|
Database references |
---|
SIMBAD | data |
References
- "QX Normae". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 April 2015.
- 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. arXiv:0811.3979. Bibcode:2010ApJ...712..964G. doi:10.1088/0004-637X/712/2/964. S2CID 15659561.
- 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. arXiv:astro-ph/0112465. Bibcode:2002ApJ...568..901W. doi:10.1086/339034. S2CID 13345357.
Constellation of Norma |
---|
|
Stars | Bayer | |
---|
Variable | |
---|
HR |
- 5798
- 5803
- 5832
- 5836
- 5865
- 5869
- 5871
- 5872
- 5882
- 5900
- 5921
- 5937
- 5946
- 5979
- 6040
- 6049
- 6059
- 6473
- 6083
- 6085
- 6099
- 6114
|
---|
HD | |
---|
Other | |
---|
|
---|
|
|
|
|
 Category |
Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.
Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии