XTE J1739−285
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 39m 53.4s[1] |
| Declination | −28° 29′ 43″[1] |
| Characteristics | |
| Spectral type | Q |
| Astrometry | |
| Distance | 4,000[2] pc |
| Details | |
| Mass | 1.51[3] M☉ |
| Radius | 10.9[3] km |
| Other designations | |
| SWIFT J1740.6−2821B | |
| Database references | |
| SIMBAD | data |
XTE J1739−285 is a low-mass X-ray binary in the constellation Ophiuchus, situated approximately 13,000 light-years from Earth.[2] It was first observed on 19 October 1999 by NASA's Rossi X-ray Timing Explorer satellite.[3]
It had previously been claimed that XTE J1739−285 was the fastest-spinning celestial body yet known, with a frequency of 1122 Hz.[4] However, a re-analysis of these data by other astronomers has been unable to reproduce this result.[5]
XTE J1739−285 has been proposed as a possible quark star, as well as 3C 58.[3]
References
- ^ a b Pavlinsky, M.; Sazonov, S.; Burenin, R.; Filippova, E.; Krivonos, R.; Arefiev, V.; Buntov, M.; Chen, C. -T.; Ehlert, S.; Lapshov, I.; Levin, V.; Lutovinov, A.; Lyapin, A.; Mereminskiy, I.; Molkov, S.; Ramsey, B. D.; Semena, A.; Semena, N.; Shtykovsky, A.; Sunyaev, R.; Tkachenko, A.; Swartz, D. A.; Vikhlinin, A. (2022). "SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year". Astronomy and Astrophysics. 661: A38. arXiv:2107.05879. Bibcode:2022A&A...661A..38P. doi:10.1051/0004-6361/202141770.
- ^ a b Fei, Zhenyan; Lyu, Ming; Zhang, Guobao; Yang, Xuejuan; García, Federico (2025). "Spectral properties of the neutron star low-mass X-ray binaries 4U 1636–53, XTE J1739–285, and MAXI J1816–195". Astronomy and Astrophysics. 695: A85. arXiv:2501.14272. Bibcode:2025A&A...695A..85F. doi:10.1051/0004-6361/202451211.
- ^ a b c d Zhang, C. M; Yin, H. X; Zhao, Y. H; Wei, Y. C; Li, X. D (2007). "Does Submillisecond Pulsar XTE J1739−285 Contain a Weak Magnetic Neutron Star or Quark Star?". Publications of the Astronomical Society of the Pacific. 119 (860): 1108. arXiv:0708.3566. Bibcode:2007PASP..119.1108Z. doi:10.1086/522796. S2CID 15651718.
- ^ Kaaret, P.; Prieskorn, Z.; In 't Zand, J. J. M.; Brandt, S.; Lund, N.; Mereghetti, S.; Götz, D.; Kuulkers, E.; Tomsick, J. A. (2007). "Evidence of 1122 Hz X-Ray Burst Oscillations from the Neutron Star X-Ray Transient XTE J1739-285". The Astrophysical Journal. 657 (2): L97 – L100. arXiv:astro-ph/0611716. Bibcode:2007ApJ...657L..97K. doi:10.1086/513270.
- ^ See footnote 1 of Chakrabarty, D; Wijnands, Rudy; Altamirano, Diego; Soleri, Paolo; Degenaar, Nathalie; Rea, Nanda; Casella, Piergiorgio; Patruno, Alessandro; Linares, Manuel (2008). "The spin distribution of millisecond X-ray pulsars". American Institute of Physics Conference Series. 1068: 67. arXiv:0809.4031. Bibcode:2008AIPC.1068...67C. doi:10.1063/1.3031208. S2CID 14585824.