Microquasar GRS 1915+105 (V* V1487 Aql)

Image
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About this Image

This sequence of VLA images shows the violent ejection of twin radio-emitting blobs of plasma, from a black hole of about 14 solar masses, residing in our own Galaxy. In this sequence of six images shown (epochs appear on the right) we see, on top, the stationary core of the hard X-ray source (likely a binary system with the black hole as one of the components) . One day after this observation, a major ejection event produced two condensations that move to the right and left. The cross marks the position of the stationary core of the source. The condensation moving to the left is approaching us obliquely and appears to displace in the sky at 125 percent of the speed of light; this is however only a relativistic illusion and the true speed of both condensations is 92 percent of the speed of light. The black hole's gravity holds a more normal star in tight orbit, and gas from this companion is transferred, or accreted, onto the hole, emitting x-rays as it is heated to a million degrees C. Many such X-ray binaries are seen by satellites such as RXTE and Chandra. Some accreting X-ray binaries emit radio jets, tiny cousins of the quasars & Active Galactic Nuclei, black holes of millions of solar masses in the center of distant galaxies.

Investigator(s):  I.F. Mirabel and L.F. Rodriguez

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Technical Data

    Telescope VLA 
    Date of Observation 1994-04-00 
    Type of Observation Continuum Observations 
    Band X 
    Wavelength 3.6 cm 
    Frequency 8.4 GHz 
    Center of Image RA: 19:15:11.55, Dec: 10:56:44.80 (J2000)  
    Field of View 0.0004 x 0.0008 degrees  
    Technical Caption VLA in A-array  

  • Astronomical database entries for V* V1487 Aql
    • Query SIMBAD for more V* V1487 Aql data

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