Sagittarius A

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About this Image

Nucleus of our Galaxy, the Milky Way. Sagittarius A (Sgr A) at 1.3 x 2.5 arcsec resolution. An intensity-hue representation: intensity is 6 cm continuum (B, C, and D array 1983-1984) and color (hue) is spectral index between 6 and 20 cm. Blue is a non-thermal spectral index of ~1 and red is an inverted spectrum of + 0. 5. The HII regions to the east of Sgr A East are partially optically thick with an inverted spectrum between 20 and 6 cm. The non-thermal source Sgr A - East shows a shell structure and may be a galactic supernova remnant with a size of about 10pc. The thermal spiral in Sgr A - West has an inverted spectrum which indicates a large electron density.

Investigator(s):  W.M. Goss, R.D. Ekers, J.H. van Gorkom, and U.J. Schwarz

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Technical Data

    Telescope VLA 
    Date of Observation 1984-00-00 
    Type of Observation Continuum Observations 
    Band L 
    Wavelength 20 cm 
    Frequency 1.4 GHz 
    Center of Image RA: 17:42:32.00, Dec: -28:59:30.00 (B1950)  
    Field of View 0.0833 x 0.0833 degrees  
    Technical Caption Observing Runs - During 1983-1984 at the VLA Configurations - A,B,C,D. Number of Antennas - 27.  

  • Astronomical database entries for Sgr A
    • Query SIMBAD for more Sgr A data

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