GX_339-4

GX 339-4

GX 339-4

Star in the constellation Ara

GX 339-4 is a moderately strong variable galactic low-mass X-ray binary (LMXB) source[1][2] and black hole candidate that flares from time to time. From spectroscopic measurements, the mass of the black-hole was found to be at least of 5.8 solar masses.[3]

An I band light curve for GX 339-4, platted assuming an orbital period of 0.7 days. Adapted from Cowley et al. (2002)[4]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...

During the outbursts GX 339-4 shows evolution of quasi-periodic oscillations (QPOs). In the rising phase the QPO frequency monotonically increase as the CENBOL propagates closer to the black hole and in the declining phase the QPO frequency monotonically decreases since the CENBOL recedes away from the black hole after viscosity is decreased. The frequency variation is thus well modeled by the propagating and oscillating shock in the sub-Keplerian flow. The entire spectrum also fits very well using two component advective flow solution.

A strong, variable relativistic jet, emitting from radio to infrared wavelengths was observed by several studies.[5][6][7]

References

  1. [1]
    SIMBAD
  2. [2]
    Bradt, H.V.D., and McClintock, J.E., Annu. Rev. Astron. Astrophys., 21, 13-66 (1983)
  3. [3]
    Hynes, R. I.; Steeghs, D.; Casares, J.; Charles, P. A.; O'Brien, K. (February 2003). "Dynamical Evidence for a Black Hole in GX 339-4". The Astrophysical Journal. 583 (2, pp. L95–L98): L95–L98. arXiv:astro-ph/0301127. Bibcode:2003ApJ...583L..95H. doi:10.1086/368108. S2CID 16820881.
  4. [4]
    Cowley, A. P.; Schmidtke, P. C.; Hutchings, J. B.; Crampton, David (March 2002). "Optical Observations of the Black Hole Candidate GX 339−4 (V821 Arae)". The Astronomical Journal. 123 (3): 1741–1749. doi:10.1086/339028. S2CID 119867410. Retrieved 25 October 2021.
  5. [5]
    Corbel, S.; Nowak, M. A.; Fender, R. P.; Tzioumis, A. K.; Markoff, S. (March 2003). "Radio/X-ray correlation in the low/hard state of GX 339-4". Astronomy and Astrophysics. 400 (3): 1007–1012. arXiv:astro-ph/0301436. Bibcode:2003A&A...400.1007C. doi:10.1051/0004-6361:20030090. S2CID 40809381.
  6. [6]
    Casella, P.; Maccarone, T. J.; O'Brien, K.; Fender, R. P.; Russell, D. M.; van der Klis, M.; Pe'Er, A.; Maitra, D.; Altamirano, D.; Belloni, T.; Kanbach, G.; Klein-Wolt, M.; Mason, E.; Soleri, P.; Stefanescu, A.; Wiersema, K.; Wijnands, R. (May 2010). "Fast infrared variability from a relativistic jet in GX 339-4". Monthly Notices of the Royal Astronomical Society: Letters. 404 (1, pp. L21–L25): L21–L25. arXiv:1002.1233. Bibcode:2010MNRAS.404L..21C. doi:10.1111/j.1745-3933.2010.00826.x. S2CID 41202016.
  7. [7]
    Gandhi, P.; Blain, A. W.; Russell, D. M.; Casella, P.; Malzac, J.; Corbel, S.; D'Avanzo, P.; Lewis, F. W.; Markoff, S.; Cadolle Bel, M.; Goldoni, P.; Wachter, S.; Khangulyan, D.; Mainzer, A. (October 2011). "A Variable Mid-infrared Synchrotron Break Associated with the Compact Jet in GX 339-4". The Astrophysical Journal Letters. 740 (1, article id. L13, 7 pp): L13. arXiv:1109.4143. Bibcode:2011ApJ...740L..13G. doi:10.1088/2041-8205/740/1/l13. S2CID 118406325.


Stub icon

This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article GX_339-4, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.