GRS 1915 + 105 , Eagle's V1487 is an X-ray double star , in which one component is an ordinary star and the other is a black hole . The system was opened on August 15, 1992 when observing the Granat Space Observatory (GRANAT) on the WATCH instrument. [5] “GRS” means “source observed by GRANAT”, “1915” - right ascension (19 hours 15 minutes), “105” means approximate declination (10 degrees 56 minutes). Infrared radiation in the same area was detected according to spectroscopic observations. [6] The binary system is located at a distance of about 11 to the pc from the Sun [7] in the constellation Eagle . GRS 1915 + 105 is the most massive stellar-mass black hole known in the Milky Way, [8] the mass of an object exceeds the solar mass by 10 to 18 times. [9] The system is also a microquasar ; the black hole probably rotates at a speed of about 1150 revolutions per second, the black hole spin is in the interval from 0.82 to 1.00 (the highest possible value). [ten]
GRS 1915 + 105 | |||
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Star | |||
Research history | |||
opening date | |||
Observational data ( Epoch J2000.0 ) | |||
Type of | microquasar [1] | ||
Right ascension | |||
Declination | |||
Distance | 8,600 +2,000 −1 600 pc [1] | ||
Constellation | |||
Astrometry | |||
Parallax (π) | 0,120 ± 0,009 [1] mas | ||
Specifications | |||
Spectral class | KIII + black hole [3] | ||
physical characteristics | |||
Weight | ? + 12.4 +2.0 −1,8 [1] M ☉ | ||
| |||
Information in databases | |||
SIMBAD | data | ||
Content
Super-Bright Galactic Source
In 1994, GRS 1915 + 105 became the first known galactic source to expel matter at an observable velocity exceeding the speed of light. [eleven]
Observations on high-resolution radio telescopes, such as VLA , MERLIN , VLBI, showed the existence of a bipolar outflow of charged particles emitting synchrotron radiation in the radio frequency range. Studies have shown that the observed superluminal motion is caused by relativistic aberration , while the true ejection velocity is about 90% of the speed of light. [7]
Weight Regulation
Repeated observations on the Chandra telescope a decade later revealed a possible mechanism for self-regulating the growth rate of GRS 1915 + 105. The jet of the ejected substance periodically weakens due to the influence of the hot wind, which blows away the accretion disk . When the wind decays, the jet gets stronger again. [12]
Notes
- ↑ 1 2 3 4 Reid, MJ; McClintock, J. E; Steiner, J. F; Steeghs, D; Remillard, R. A; Dhawan, V; Narayan, R. A Microsurgeon 1915 + 105 and the Black Hole Mass (English) // The Astrophysical Journal : journal. - IOP Publishing , 2014. - Vol. 796 . - P. 2 . - DOI : 10.1088 / 0004-637X / 796/1/2 . - . - arXiv : 1409.2453 .
- ↑ 1 2 Liu, QZ; Van Paradijs, J; Van Den Heuvel, EPJ X-ray ray scanners for the Galaxy, LMC, and SMC (Fourth edition) (Eng.) // Astronomy and Astrophysics : journal. - 2007. - Vol. 469 , no. 2 - P. 807 . - DOI : 10.1051 / 0004-6361: 20077303 . - . - arXiv : 0707.0544 .
- ↑ Abubekerov, MK; Antokhina, E. A; Cherepashchuk, A. M; X-ray binary 2S 0921-630 (English) // Astronomy Reports : journal. - 2006. - Vol. 50 , no. 7 - P. 544 . - DOI : 10.1134 / S1063772906070043 . - . - arXiv : 1201.4689 .
- ↑ VizieR
- ↑ Castro-Tirado, AJ; Brandt, S; Lund, N. Grs 1915 + 105 (Unc.) // IAU Circ. - 1992. - T. 5590 . - p . 2 . - .
- ↑ Castro-Tirado, AJ; Geballe, T.R; Lund, N. Infrared Spectroscopy of the Superluminal Galactic Source GRS 1915 + 105 During the September 1994 Outburst (Eng.) // The Astrophysical Journal : journal. - IOP Publishing , 1996. - Vol. 461 , no. 2 - P. L99 . - DOI : 10.1086 / 310009 . - .
- ↑ 1 2 Fender, RP; Garrington, S. T; McKay, D. J; Muxlow, TW B; Pooley, G. G; Spencer, R. E; Stirling, A. M; Waltman, EB MERLIN observations of relativistic ejections from GRS 1915 + 105 (English) // Monthly Notices of the Royal Astronomical Society : journal. - Oxford University Press , 1999. - Vol. 304 , no. 4 - P. 865 . - DOI : 10.1046 / j.1365-8711.1999.02364.x . - . - arXiv : astro-ph / 9812150 .
- Very A Very Massive Stellar Black Hole in the Milky Way Galaxy . The appeal date is November 25, 2017.
- ↑ J; Greiner. Grs 1915 + 105 (Undec.) . - 2001. - S. arXiv: astro — ph / 0111540 . - . - arXiv : astro-ph / 0111540 .
- ↑ Jeanna Bryne. Pushing the Limit: Black Hole Spins at Phenomenal Rate . space.com. The appeal date is November 25, 2017.
- ↑ Mirabel, I. F; Rodríguez, LF A superluminal source in the Galaxy (Engl.) // Nature. - 1994. - Vol. 371 , no. 6492 . - P. 46 . - DOI : 10.1038 / 371046a0 . - .
- ↑ NASA (2009-03-25). An Erratic Black Hole Regulates Itself . Press release . Checked 2009-04-16 .
Links
- A Very Massive Stellar Black Hole in the Milky Way Galaxy November 28, 2001 (ESO)
- Image V1487 Aquilae
- O maior buraco negro estelar da Via Láctea (The biggest stellar black hole of the Milky Way) - in Portuguese.
- MICRO-QUASAR WITHIN OUR GALAXY
- The micro quasar GRS 1915 + 105 INTEGRAL Science Data Center