4U 1700-37
 A light curve for V884 Scorpii. The main plot, from TESS data,[1] shows the variation over several orbital periods. The inset plot, adapted from van Paradijs et al. (1984),[2] shows the average variation as a function of orbit phase. | ||
| Observation data J2000
| ||
|---|---|---|
| Constellation | Scorpius | |
| Right ascension | 17h 03m 56.77256s[3] | |
| Declination | −37° 50′ 38.9133″[3] | |
| Apparent magnitude (V) | 6.51 (- 6.57) - 6.60[4] | |
| Characteristics | ||
| Spectral type | O6Iafcp[5] | |
| U−B color index | −0.727[6] | |
| B−V color index | +0.253[6] | |
| Variable type | HMXB[4]
| |
| Absolute magnitude (MV) | −6.52[8] | |
Semi-amplitude (K1)(primary) | 10.06 ± 0.66 km/s | |
| Details[10] | ||
| O star | ||
| Mass | 58±11 M☉ | |
| Radius | 21.9+1.3 −0.5 R☉ | |
| Luminosity | 660,000 L☉ | |
| Temperature | 35,000±1,000 K | |
| X-ray object | ||
| Mass | 2.44±0.27 M☉ | |
| Database references | ||
| SIMBAD | data | |
4U 1700-37 is one of the stronger
The "4U" designation refers to the fourth (and final) Uhuru catalog.The X-ray source is associated with a bright (6.53 V magnitude)
keV
hard X-ray energy region.
Evidence of Compton cooling during an X-ray flare recorded by the Chandra X-ray telescope strongly suggests that the compact object is a neutron star;[13] if verified it would be among the most massive known, and near the boundary of the theoretical maximum.
4U 1700-37 is a
runaway system. It has a high velocity of 63±5 km/s with respect to its parent cluster, NGC 6231. It was kicked out of the cluster about 2.2 million years ago by a supernova explosion.[14]
References
- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
- Bibcode:1984A&AS...55....7V.
- ^ .
- ^ Bibcode:2009yCat....102025S.
- S2CID 118847528.
- ^ Bibcode:1985A&AS...61..387K.
- S2CID 119323941.
- S2CID 220128144.
- S2CID 119387088.
- S2CID 119552560.
- ^ "HD 153919". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 4 September 2017.
- doi:10.1086/181181.
- S2CID 56539478.
- S2CID 237353522.
External links
- Seifina, Elena; Titarchuk, Lev; Shaposhnikov, Nikolai (2016). "X-Ray Spectra of the High-Mass X-Ray Binary 4U 1700-37 Usingbepposax, Suzaku, Andrxteobservations". The Astrophysical Journal. 821 (1): 23. S2CID 119118682.
- Jaisawal, G. K.; Naik, S. (2015). "Broad-band spectroscopy of the eclipsing high-mass X-ray binary 4U 1700-37 with Suzaku". Monthly Notices of the Royal Astronomical Society. 448 (1): 620–628. S2CID 118350876.
- Giménez-García, A.; Torrejón, J. M.; Eikmann, W.; Martínez-Núñez, S.; Oskinova, L. M.; Rodes-Roca, J. J.; Bernabéu, G. (2015). "An XMM-Newton view of FeKα in high-mass X-ray binaries". Astronomy & Astrophysics. 576: A108. S2CID 119232944.
- Islam, Nazma; Paul, Biswajit (2016). "Orbital evolution and search for eccentricity and apsidal motion in the eclipsing HMXB 4U 1700−37". Monthly Notices of the Royal Astronomical Society. 461 (1): 816–824. S2CID 118605899.
