Black Hole at NGC4258 Center

Minimum credit line: Image courtesy of NRAO/AUI and Gerald Cecil and Holland Ford(for details, see Image Use Policy).

About this Image

An optical image in H-alpha light of the central part of NGC 4258, which shows jet-like structures emerging from the core on a scale of a kiloparsec (3260 light-years). The inset shows the newly discovered molecular disk that contains water vapor masers. Their velocities are color coded (blue for approaching, red for receding and green for stationary with respect to the galaxy) and define nearly perfect Keplerian motion around an unseen object of 40 million solar masses. Optical image courtesy of Gerald Cecil and Holland Ford.

Investigator(s):  Makoto Miyoshi, James Moran, James Herrnstein, Lincoln Greenhill, Naomasa Nakai, Philip Diamond, and Makoto Inoue

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Technical Data

    Telescope VLBA 
    Date of Observation 1995-00-00 
    Type of Observation Continuum Observations 
    Band K 
    Wavelength 1.2 cm 
    Frequency 22 GHz 
    Center of Image RA: 12:18:57.54, Dec: 47:18:14.30 (J2000)  
    Field of View 0.0000 x 0.0000 degrees  

  • Astronomical database entries for ngc4258
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