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4U 1700-37

A light curve for V884 Scorpii. The main plot, from TESS data, shows the variation over several orbital periods. The inset plot, adapted from van Paradijs et al. (1984), shows the average variation as a function of orbit phase.
Observation data Epoch J2000      Equinox J2000
Constellation	Scorpius
Right ascension	17 03 56.77256
Declination	−37° 50′ 38.9133″
Apparent magnitude (V)	6.51 (- 6.57) - 6.60
Characteristics
Spectral type	O6Iafcp
U−B color index	−0.727
B−V color index	+0.253
Variable type	Ellipsoidal + HMXB
Astrometry
Radial velocity (Rv)	−75.00±7.4 km/s
Proper motion (μ)	RA: 2.414 mas/yr Dec.: 5.022 mas/yr
Parallax (π)	0.6327 ± 0.0259 mas
Distance	5,200 ± 200 ly (1,580 ± 60 pc)
Absolute magnitude (MV)	−6.52
Orbit
Period (P)	3.4118 ± 0.0001 d
Eccentricity (e)	0.17±0.06
Periastron epoch (T)	JD 2443702.62±0.21
Argument of periastron (ω) (primary)	54±24°
Semi-amplitude (K1) (primary)	10.06 ± 0.66 km/s
Details
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☉
Other designations
V884 Sco, CD−37°11206, HD 153919, HIP 83499, SAO 208356
Database references
SIMBAD	data

4U 1700-37 is one of the stronger binary X-ray sources in the sky, and is classified as a high-mass X-ray binary. It was discovered by the Uhuru satellite. The "4U" designation refers to the fourth (and final) Uhuru catalog.

The X-ray source is associated with a bright (6.53 V magnitude) blue supergiant star HD 153919, which is orbited by an accreting compact object that must be either a neutron star or a black hole. The X-ray source is eclipsed by the star every 3.4 days, but no pulsations have yet been observed. The source is one of the ten brightest persistent X-ray sources in the 10-100 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; 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.

References

1. "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
2. van Paradijs, J.; van Amerongen, S.; van der Woerd, H.; Tjemkes, S.; Menzies, J. W. (January 1984). "Optical photometry of massive X-ray binaries: 4U1700-37/HD 153919 = V884 Sco". Astronomy and Astrophysics Supplement Series. 55: 7–14. Bibcode:1984A&AS...55....7V.
3. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
4. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
5. Sota, A.; Apellániz, J. Maíz; Morrell, N. I.; Barbá, R. H.; Walborn, N. R.; Gamen, R. C.; Arias, J. I.; Alfaro, E. J. (2014). "The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars". The Astrophysical Journal Supplement Series. 211 (1): 10. arXiv:1312.6222. Bibcode:2014ApJS..211...10S. doi:10.1088/0067-0049/211/1/10. S2CID 118847528.
6. ^ Kozok, J. R. (1985). "Photometric observations of emission B-stars in the southern Milky Way". Astronomy and Astrophysics Supplement Series. 61: 387–405. Bibcode:1985A&AS...61..387K.
7. Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID 119323941.
8. Melnik, A. M.; Dambis, A. K. (2020), "Distance scale for high-luminosity stars in OB associations and in field with Gaia DR2. Spurious systematic motions", Astrophysics and Space Science, 365 (7): 112, arXiv:2006.14649, Bibcode:2020Ap&SS.365..112M, doi:10.1007/s10509-020-03827-0, S2CID 220128144.
9. Pourbaix, D.; et al. (2004). "S_B: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727–732. arXiv:astro-ph/0406573. Bibcode:2004A&A...424..727P. doi:10.1051/0004-6361:20041213. S2CID 119387088.
10. Clark, J. S.; Goodwin, S. P.; Crowther, P. A.; Kaper, L.; Fairbairn, M.; Langer, N.; Brocksopp, C. (2002). "Physical parameters of the high-mass X-ray binary 4U1700-37". Astronomy & Astrophysics. 392 (3): 909–920. arXiv:astro-ph/0207334. Bibcode:2002A&A...392..909C. doi:10.1051/0004-6361:20021184. S2CID 119552560.
11. "HD 153919". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 4 September 2017.
12. Jones, C.; Forman, W.; Tananbaum, H.; Schreier, E.; Gursky, H.; Kellogg, E.; Giacconi, R. (1973). "Evidence for the Binary Nature of 2U 1700-37". The Astrophysical Journal. 181: L43. Bibcode:1973ApJ...181L..43J. doi:10.1086/181181.
13. Martinez-Chicharro, M.; Torrej ́on, J. M.; Oskinova, L.; F ̈urst, F.; Postnov, K.; Rodes-Roca, J. J.; Hainich, R.; Bodaghee, A. (2018). "Evidence of Compton cooling during an X-ray flare supports a neutron star nature of the compact object in 4U1700−37". Monthly Notices of the Royal Astronomical Society: Letters. 473 (1): L74 – L78. arXiv:1710.01907. Bibcode:2018MNRAS.473L..74M. doi:10.1093/mnrasl/slx165. S2CID 56539478.
14. Van Der Meij, Vincent; Guo, Difeng; Kaper, Lex; Renzo, Mathieu (2021). "Confirming NGC 6231 as the parent cluster of the runaway high-mass X-ray binary HD 153919/4U 1700-37 with Gaia DR2". Astronomy & Astrophysics. 655: A31. arXiv:2108.12918. Bibcode:2021A&A...655A..31V. doi:10.1051/0004-6361/202040114. 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. arXiv:1603.05504. Bibcode:2016ApJ...821...23S. doi:10.3847/0004-637X/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. arXiv:1501.01122. Bibcode:2015MNRAS.448..620J. doi:10.1093/mnras/stv029. 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. arXiv:1501.03636. Bibcode:2015A&A...576A.108G. doi:10.1051/0004-6361/201425004. 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. arXiv:1606.01059. Bibcode:2016MNRAS.461..816I. doi:10.1093/mnras/stw1299. S2CID 118605899.

v t e Constellation of Scorpius
List of stars in Scorpius Scorpius in Chinese astronomy
Stars	Bayer α (Antares) β (Acrab) δ (Dschubba) ε (Larawag) ζ ζ η θ (Sargas) ι ι κ (Girtab) λ (Shaula) μ (Xamidimura) μ (Pipirima) ν (Jabbah) ξ ο π (Fang) ρ (Iklil) σ (Alniyat) τ (Paikauhale) υ (Lesath) χ ψ ω ω G (Fuyue) H (β Nor) N (α Nor) Q Flamsteed 1 (b) 2 (A) 3 4 11 12 (c) 13 (c) 16 18 22 (i) 25 27 Variable T U RR RS RV RY RZ AH AI AK AR BM CL FQ HK KQ V393 V453 V455 V482 V500 V636 V701 V703 V718 V728 V745 V760 V856 V861 V866 V884 V893 V900 V905 V906 V907 V911 V913 V915 V918 V919 V921 V922 V923 V929 V933 V949 V951 V952 V957 V965 V970 V973 V975 V992 V1003 V1007 V1018 V1026 V1033 V1034 V1036 V1040 V1051 V1058 V1068 V1073 (k) V1074 V1075 V1077 V1094 V1104 V1186 V1187 V1280 V1292 V1294 V1309 HR 5906 5910 5934 5965 5969 5973 5996 5998 5999 6000 6001 6003 6006 6007 6012 6015 6017 6044 6051 6053 6054 6061 6070 (d) 6076 6077 6078 6080 6094 6097 6100 6106 6122 6145 6160 6178 6192 6206 6209 6210 6211 6214 6218 6221 6244 6260 6266 6272 6273 6282 6298 6311 6316 6331 6338 6344 6366 6371 6381 6382 6389 6398 6403 6405 6409 6420 6454 6456 6460 6470 6501 6503 6517 6523 6539 6557 6558 6583 6587 6597 6613 6628 6643 6648 6649 6651 6653 6657 6658 6668 6671 6675 6678 6682 6683 HD 143567 144432 145377 146436 149274 150248 150420 152424 153234 153950 (Rapeto) 155448 155985 158042 159868 162020 Other Gliese 618 Gliese 667 Gliese 682 CD -35 11760 CD -38 10980 EPIC 204278916 EPIC 204376071 GCRT J1745−3009 GSC 06214-00210 GX 340+0 GX 349+2 H1-36 H1743-322 HIP 79431 (Sharjah) IGR J17091-3624 IGR J17252−3616 IRAS 17163−3907 K2-24 K2-33 LSS 4067 MOA-2008-BLG-310L MXB 1735-44 OAO 1657-415 OGLE-2005-BLG-071L OGLE-2005-BLG-390L OGLE-2006-BLG-109L Oph 162225-240515 Pismis 24-1 PSR B1620−26 PSR B1706−44 PSR B1737−30 PSR J1614−2230 Rapid Burster ROXs 12 1RXS J160929.1−210524 1RXS J170849.0−400910 Scorpius X-1 Th 28 Trumpler 27-1 Trumpler 27-27 Trumpler 27-28 Trumpler 27-102 Trumpler 27-105 4U 1700-37 4U 1702-42 4U 1705-44 4U 1724-307 4U 1728-34 4U 1746-371 UScoCTIO 108 VVV-WIT-07 WASP-17 (Dìwö) WR 86 WR 93b Wray 17-96 XTE J1720−318 XTE J1739−302 XTE J1751−305
Exoplanets HD 145377 b HD 153950 b HD 159868 b HIP 78530 b HIP 79431 b K2-24b c K2-33b OGLE-2005-BLG-071Lb OGLE-2005-BLG-390Lb OGLE-2007-BLG-368Lb PSR B1620−26 b (Methuselah) WASP-17b V921 Scorpii b
Star clusters	NGC 6124 6139 6144 6231 6242 6256 6281 6380 6388 6400 6441 6453 6480 6496 Other Messier 4 Messier 7 Messier 80 Trumpler 27
Nebulae	NGC 6072 6153 6302 6334 6337 6357
Galaxies	NGC 6000 Other PKS 1622-297 TXS 1545-234
Category

• Binary stars
• Objects with variable star designations
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Neutron stars
• O-type supergiants
• Rotating ellipsoidal variables
• X-ray binaries
• Runaway stars
• Scorpius